WO2018168290A1 - Dispositif d'absorption de dioxyde de carbone, procédé d'absorption de dioxyde de carbone, et dispositif électronique - Google Patents

Dispositif d'absorption de dioxyde de carbone, procédé d'absorption de dioxyde de carbone, et dispositif électronique Download PDF

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WO2018168290A1
WO2018168290A1 PCT/JP2018/004766 JP2018004766W WO2018168290A1 WO 2018168290 A1 WO2018168290 A1 WO 2018168290A1 JP 2018004766 W JP2018004766 W JP 2018004766W WO 2018168290 A1 WO2018168290 A1 WO 2018168290A1
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gas
concentration
carbon dioxide
unit
humidity
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PCT/JP2018/004766
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English (en)
Japanese (ja)
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峻之 中
貴洋 土江
健太郎 岸良
博久 山田
郁夫 柳瀬
拳人 佐藤
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シャープ株式会社
国立大学法人埼玉大学
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Publication of WO2018168290A1 publication Critical patent/WO2018168290A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
    • B01J20/10—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B32/00—Carbon; Compounds thereof
    • C01B32/50—Carbon dioxide
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
    • Y02C20/00—Capture or disposal of greenhouse gases
    • Y02C20/40—Capture or disposal of greenhouse gases of CO2
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/151—Reduction of greenhouse gas [GHG] emissions, e.g. CO2

Definitions

  • the carbon dioxide carbon dioxide absorber having (CO 2) carbon dioxide absorbent that absorbs the (CO 2 absorber) (CO 2 absorber) concerning contained in the gas.
  • Patent Documents 1 and 2 disclose a carbon dioxide gas absorbent (in other words, a CO 2 absorbent) mainly composed of lithium silicate containing a predetermined amount of moisture.
  • Japanese Patent Publication Japanese Patent Laid-Open No. 2003-126688 (published May 7, 2003)” Japanese Patent Publication “Japanese Patent Laid-Open No. 2005-13952 (published on January 20, 2005)”
  • the structure for further improving the CO 2 absorption performance of the CO 2 absorbent material there is still room for improvement.
  • the configuration for increasing CO 2 absorption rate of CO 2 absorption material carbon dioxide absorption rate
  • An object of one embodiment of the present disclosure is to realize a CO 2 absorption device or the like that can improve the CO 2 absorption rate of a CO 2 absorbent material as compared with the conventional one.
  • a carbon dioxide absorption device includes a carbon dioxide absorbent that absorbs carbon dioxide contained in the gas from a gas containing moisture and carbon dioxide.
  • a carbon dioxide absorber comprising a tetravalent lithium silicate, a carbon dioxide concentration of 1% or more and a relative humidity of 80% or more.
  • a supply unit for supplying the carbon dioxide absorbent is provided.
  • the carbon dioxide absorption method which concerns on 1 aspect of this indication is the carbon dioxide absorber which absorbs the carbon dioxide contained in the said gas from the gas containing a water
  • the CO 2 absorption rate of CO 2 absorbent becomes possible to improve than before.
  • the carbon dioxide absorption method according to one embodiment of the present disclosure has the same effect.
  • FIG. 3 is a functional block diagram illustrating a configuration of a main part of the CO 2 absorber according to the first embodiment. It is a figure which shows an example of the result of having measured powder X using XRD.
  • (A) is a diagram schematically showing a configuration of a measurement system for measuring the CO 2 absorption rate of CO 2 absorber of Figure 1, the interior of the (b) is CO 2 absorber tube shown in (a)
  • FIG. (A) and (b) are diagrams showing the measurement results of the CO 2 absorption rate obtained in the measurement system of Figure 4. It is a figure which shows an example of the result of having measured each sample using XRD.
  • FIG. (A) ⁇ (c) are respectively a functional block diagram showing a configuration of a main part of the CO 2 absorber as a variation of the CO 2 absorber of Figure 1.
  • 6 is a functional block diagram illustrating a configuration of a main part of a CO 2 absorber according to Embodiment 2.
  • FIG. (A) and (b) are views for explaining the respective configurations and operations of the concentration control unit and the CO 2 concentration part of the CO 2 absorbing device of FIG. (A) and (b) are views for explaining the respective configurations and operations of the humidification control unit and the humidifying unit in the CO 2 absorber of FIG. It is a diagram showing a process flow of the CO 2 absorption in CO 2 absorbing device of FIG.
  • FIG. 1 It is a functional block diagram showing a configuration of a main part of the CO 2 absorbing device related to embodiment 3.
  • (A) and (b) are diagrams for explaining the operation of the absorption path switching control unit and absorption path switching unit in the CO 2 absorber of Figure 11. It is a diagram showing a process flow of the CO 2 absorption in CO 2 absorbing device of Figure 11. It is a figure which shows schematic structure of the air cleaner which concerns on Embodiment 4.
  • FIG. 1 is a functional block diagram showing a configuration of a main part of the CO 2 absorber 1.
  • the CO 2 absorber 1 includes a CO 2 absorbent 10 (carbon dioxide absorbent), a CO 2 concentrating unit 11 (concentrating unit, supply unit), and a humidifying unit 12 (supply unit).
  • the CO 2 absorber 1 takes in a gas G0 that is an inlet gas from the outside. In the CO 2 absorber 1, the gas G 0 passes through the CO 2 concentrating unit 11 and the humidifying unit 12 in this order, and is finally led to the CO 2 absorbent 10.
  • the CO 2 concentration unit 11 and the humidification unit 12 serve as a supply unit that supplies a high CO 2 concentration / high humidity gas (described later) to the CO 2 absorbent 10 described later.
  • a high CO 2 concentration / high humidity gas described later
  • at least one of the CO 2 concentration unit 11 and the humidification unit 12 may be omitted from the CO 2 absorber 1 (see FIG. 6 described later).
  • the gas G0 passing through the CO 2 concentrating unit 11 and moving toward the humidifying unit 12 is referred to as a gas G1.
  • the gas G1 that passes through the humidifying unit 12 and travels toward the CO 2 absorbent 10 is referred to as a gas G2.
  • the gases G0 to G2 may each be a gas containing moisture (ie, water vapor) and CO 2 (ie, carbon dioxide gas).
  • the CO 2 absorber 1 is provided with members such as a pump (fluid machine) and a fan (blower) for taking in the gas G0 from the outside and guiding the gas G0 (gas G1 and G2) to the CO 2 absorbent 10. It may be done. Further, the CO 2 absorber 1 may be provided with a pipe for transporting the gas G0 (gas G1 and G2). However, in FIG. 1 and the subsequent drawings, illustration of these members is omitted for simplification of the drawing.
  • CO 2 absorbent 10 absorbs CO 2 contained in the gas. Specifically, CO 2 absorbent material 10, from moisture (i.e. water vapor) and CO 2 (i.e. carbon dioxide) gas in the space including the separates at least a portion of the CO 2, absorbing the CO 2 To do.
  • the gas G2 that has passed through the humidifying unit 12 described below is introduced (supplied) to the CO 2 absorbent 10. That is, the CO 2 absorber 1 is configured to bring the gas G2 into contact with the CO 2 absorbent 10.
  • space means an environment in which humans (or other living organisms) can survive. Therefore, the atmospheric pressure in the space is near atmospheric pressure (1 atm).
  • Room temperature means a temperature of about 1 ° C. to 30 ° C., for example. Further, for example, a temperature of about 1 ° C. to 50 ° C. may be referred to as “about room temperature”.
  • the CO 2 absorbent 10 contains Li 4 SiO 4 (tetravalent lithium silicate) as a main component.
  • tetravalent lithium silicate means “lithium silicate having four monovalent Li”.
  • the tetravalent lithium silicate is the main component of the CO 2 absorbent 10.
  • CO 2 absorption amount of CO 2 absorber 10 can be adjusted CO 2 absorption amount of CO 2 absorber 10. That is, it adjusts the CO 2 absorption rate of CO 2 absorber 10.
  • the "CO 2 absorption rate of CO 2 absorber 10" means the ratio of the relative "CO 2 mass of absorbent material 10", "mass of CO 2 CO 2 absorbent material 10 has absorbed” (rate) .
  • the mass of CO 2 absorber 10 W1 (unit: g) of the mass of CO 2 CO 2 absorbent material 10 has absorbed W2 (unit: g) of the.
  • Ac (W2 / W1) ⁇ 100.
  • CO 2 concentration unit 11 The gas G0 taken from the outside of the CO 2 absorber 1 is introduced into the CO 2 concentrating unit 11. CO 2 concentration unit 11 increases the CO 2 concentration of the gas G0.
  • the gas an operation of increasing the CO 2 concentration (eg gas G0), also referred to as "gas to CO 2 and concentrated.”
  • the CO 2 concentrating unit 11 concentrates the gas G0 with CO 2 and increases the CO 2 concentration of the gas to a predetermined value or more. Then, the CO 2 concentrating unit 11 introduces a gas with an increased CO 2 concentration (that is, the gas G1) into the humidifying unit 12.
  • the “predetermined value of the CO 2 concentration” is also referred to as “predetermined concentration”.
  • the predetermined concentration may be a “1%” CO 2 concentration. That is, the CO 2 concentration unit 11 increases the CO 2 concentration of the gas G0 to 1% or more, and introduces the gas G1 having a CO 2 concentration of 1% or more into the humidification unit 12.
  • the CO 2 concentrating unit 11 uses a pressure swing adsorption (PSA) device, a compressor that can supply pressurized air, and a membrane that can separate CO 2 in gas (eg, polyimide). (Separation membrane).
  • PSA pressure swing adsorption
  • the CO 2 concentration unit 11 is not particularly limited as long as the CO 2 concentration of the gas is increased to a predetermined value or more.
  • the humidifier 12 the gas G1 from CO 2 concentration unit 11 (CO 2 concentration of 1% or more of the gas) is introduced.
  • the humidifying unit 12 increases the humidity of the gas G1. That is, the humidifying unit 12 humidifies the gas G1.
  • the humidifying unit 12 humidifies the gas G1, and increases the humidity of the gas to a predetermined value or more.
  • the “predetermined value of humidity” is also referred to as “predetermined humidity”.
  • the predetermined humidity may be “80%” humidity. That is, the humidifying unit 12 increases the humidity of the gas G1 to 80% or more, and introduces the gas G2 having a humidity of 80% or more into the CO 2 absorbent 10.
  • humidity in this specification means relative humidity (Relative Humidity, RH).
  • RH relative humidity
  • Relative humidity represents the ratio of the water vapor pressure of a gas at a predetermined temperature to the saturated water vapor pressure at the predetermined temperature.
  • the humidifying unit 12 a device (bubbling device) for bubbling gas in water may be used.
  • the humidification part 12 should just increase the humidity of gas more than predetermined value, and the structure is not specifically limited.
  • a known humidifier e.g., a vaporizing type, an ultrasonic type, or a heating type humidifier
  • a heating type humidifier may be used as the humidifying unit 12.
  • silicon dioxide and lithium carbonate are inserted into a three-dimensional mill.
  • silicon dioxide and lithium carbonate are mixed by a three-dimensional mill using a ZrO 2 ball for about 10 minutes (an example of mixing time) (mixing step).
  • the three-dimensional mill used in this production method is 3D-210-D2 manufactured by Nagao System.
  • the mixed powder of silicon dioxide and lithium carbonate mixed by the three-dimensional mill is heated in an electric furnace at a temperature of about 700 ° C. (an example of a heating temperature) for about 10 hours (an example of a heating time) ( Heating step). Then, the mixed powder after heating is pulverized in a mortar (pulverization step), and the pulverized powder is passed through a sieve.
  • the thus-prepared powder (powdered) Li 4 SiO 4 is used as the CO 2 absorbent 10 (CO 2 absorbent containing Li 4 SiO 4 as a main component).
  • the powder produced as described above is referred to as powder X.
  • the average particle diameter (D50) was about 10 ⁇ m.
  • the apparatus used in the said mixing process is not limited to a three-dimensional mill.
  • silicon dioxide and lithium carbonate may be mixed using a mortar or a pot mill.
  • the mixing time in the mixing step varies depending on the total weight of silicon dioxide and lithium carbonate weighed in the weighing step.
  • the heating temperature and the heating time in the heating process vary depending on the electric furnace used in the heating process. Considering the difference in performance and specifications of the electric furnace used, the heating temperature may be, for example, 600 ° C. or more and 1000 ° C. or less. Moreover, the heating time should just be 5 hours or more and less than 40 hours, for example.
  • CO 2 absorbent material 10 may be formed into pellets.
  • shape of the pellet any shape such as a cylinder, a sphere, or a rectangular parallelepiped may be used.
  • the size of the pellet may be, for example, about several mm to several tens mm.
  • FIG. 2 is a graph showing an example of the result of measuring the powder X using XRD.
  • the horizontal axis represents the diffraction angle (unit: °)
  • the vertical axis represents the X-ray intensity (arbitrary unit) after scattering in the measurement target (material).
  • the legend “Li 4 SiO 4 ” (solid line) in FIG. 2 is a measurement result obtained when the powder X is a measurement target.
  • the legend “Li 4 SiO 4 -ref (37-1472)” (triangle mark) in FIG. 2 shows the analysis result of Li 4 SiO 4 as a reference.
  • the powder X solid line
  • the CO 2 absorbent 10 produced as described above is a substance containing Li 4 SiO 4 as a main component.
  • FIG. 3A is a diagram schematically showing the configuration of the measurement system 110.
  • the measurement system 110 includes a dry air cylinder 120, a CO 2 cylinder 121, a flow rate regulator 122/123, a three-way valve 124/125, a humidifier 126, a hygrometer 127, a heating unit 128, a CO 2 concentration meter 129, and a CO 2 absorption.
  • a tube 130 is provided.
  • An inlet gas Gin is introduced into the CO 2 absorption pipe 130 from a hygrometer 127.
  • FIG. 3B is a diagram illustrating an internal state of the CO 2 absorption pipe 130 in the measurement system 110.
  • the CO 2 absorbing material 10 is loaded inside the CO 2 absorber tube 130. More specifically, CO 2 absorbent material 10 is left on the container 135. CO 2 absorbent material 10 absorbs CO 2 contained in the inlet gas Gin passing inside the CO 2 absorber tube 130.
  • the outlet gas (Outlet Gas) of the CO 2 absorption pipe 130 is referred to as outlet gas Gout.
  • Outlet gas Gout is introduced from the CO 2 absorber tube 130 in the CO 2 concentration meter 129.
  • the CO 2 concentration meter 129 detects the CO 2 concentration of the outlet gas Gout. If the CO 2 concentration of the inlet gas Gin (in other words, the amount of CO 2 ) is known, the CO 2 absorbent 10 is detected using the detection result of the CO 2 concentration meter 129 (CO 2 concentration of the outlet gas Gout). The amount of absorbed CO 2 can be measured (calculated). Therefore, it is possible to measure the CO 2 absorption rate of CO 2 absorber 10.
  • the dry air cylinder 120 contains a gas (dry air) that contains substantially no CO 2 and moisture (water vapor) and contains nitrogen and oxygen as main components.
  • the flow rate regulator 122 adjusts the flow rate of the dry air flowing from the dry air cylinder 120 to the three-way valve 124 side. Gaseous CO 2 is sealed in the CO 2 cylinder 121.
  • the flow rate adjuster 123 adjusts the flow rate of the dry air flowing from the CO 2 cylinder 121 to the three-way valve 124 side.
  • a drying line 131 and a humidification line 132 shown in FIG. 3A are provided in parallel.
  • the three-way valves 124 and 125 switch paths for directing the gas introduced from the dry air cylinder 120 and the CO 2 cylinder 121 to the three-way valve 124 to the hygrometer 127. That is, one of the drying line 131 or the humidification line 132 can be selected as the route by the three-way valves 124 and 125.
  • a humidifier 126 is provided in the humidification line 132. For this reason, when gas is introduced into the hygrometer 127 via the humidification line 132, the humidity of the gas can be increased to a desired humidity. On the other hand, the humidifier 126 is not provided in the drying line 131. When it is not necessary to increase the humidity of the gas, the gas may be introduced into the hygrometer 127 via the drying line 131.
  • the hygrometer 127 detects the humidity of the gas.
  • the gas that has passed through the hygrometer 127 is introduced into the CO 2 absorption pipe 130 as the inlet gas Gin.
  • the heating unit 128 heats the CO 2 absorption tube 130.
  • the heating unit 128, the CO 2 absorber 10 and the inlet gas Gin present in the CO 2 absorbing tube 130 can be heated to the desired temperature.
  • each of the CO 2 absorption tube 130 and the container 135 is preferably formed of a ceramic material so as to withstand the heating by the heating unit 128.
  • quartz as the material of the CO 2 absorber tube 130, as the material of the container 135 may be used alumina.
  • the flow rate of the produced gas is adjusted by the flow rate adjusters 122 and 123 according to the CO 2 concentration of the gas.
  • the CO 2 concentration is 100%: flow rate 0.01 L / min;
  • the CO 2 concentration is 20%: flow rate 0.05 L / min; -When the CO 2 concentration is 10%: flow rate 0.1 L / min; -When the CO 2 concentration is 1%: flow rate 1 L / min; If ⁇ CO 2 concentration of 0.1%: flow rate 2L / min; It was.
  • the flow rate of the gas is adjusted to be smaller.
  • the three-way valve 124 was controlled, and the gas was introduced into the humidifier 126 of the humidification line 132.
  • a gas (humidified gas) having a humidity of 50 to 80% was produced.
  • the humidified gas was introduced into the hygrometer 127 via the three-way valve 125.
  • the humidity of the humidified gas was measured with a hygrometer 127.
  • the humidified gas was introduced into the CO 2 absorption tube 130 as the inlet gas Gin.
  • the inlet gas Gin was brought into contact with the CO 2 absorbent 10 for 3 days. At this time, heating by the heating unit 128 was not performed, and the CO 2 absorbent tube 130 and the CO 2 absorbent 10 were brought to room temperature.
  • the flow rate regulators 122 and 123 set the flow rate of CO 2 supplied from the CO 2 cylinder 121 to 0 L / min and the flow rate of dry air supplied from the dry air cylinder 120 to 2 L / min. That is, a gas containing substantially no CO 2 and moisture was produced. Then, by controlling the three-way valve 124, 125, and introducing the gas into the drying line 133, a gas containing no CO 2 and moisture (hereinafter, also referred to as CO 2, water-free gas) was prepared. The CO 2 / water-free gas was introduced into the CO 2 absorption pipe 130 as an inlet gas Gin.
  • CO 2 / water-free gas was introduced into the CO 2 absorption pipe 130 as an inlet gas Gin.
  • the inlet gas Gin (CO 2 ⁇ moisture-free gas) was heated under a state that flowed into the CO 2 absorber tube 130, the CO 2 absorber tube 130 heating unit 128 to 700 ° C.. By thus heating the CO 2 absorbing material 10, to release the CO 2 which is absorbed in the CO 2 absorber 10.
  • the heating of the CO 2 absorber 10, the CO 2 concentration meter 129 was measured over time CO 2 concentration at the outlet gases Gout. Using the measurement result of the CO 2 concentration meter 129, the amount of CO 2 absorbed by the CO 2 absorbent 10 was measured. Then, to measure the CO 2 absorption rate of CO 2 absorber 10.
  • FIG. 4 is a table showing the measurement results of the CO 2 absorption rate confirmed by the inventors using the measurement system 110.
  • FIG. 4A shows measurement results when the CO 2 concentration of the inlet gas Gin is changed variously while the humidity of the inlet gas Gin is kept at 80%. As shown in FIG. 4A, when the CO 2 concentration of the inlet gas Gin is low (when the CO 2 concentration is 0.1%), the slightly low CO 2 absorption rate of “31.0%”. Was confirmed.
  • FIG. 4B shows measurement results when the humidity of the inlet gas Gin is changed variously while maintaining the CO 2 concentration of the inlet gas Gin at 1%.
  • the humidity of the inlet gas Gin is low (when the humidity is 50 to 60%), the CO 2 absorption rate is slightly low (the CO 2 absorption rate below 36.7%). ) was confirmed.
  • the inventors have stated that “the CO 2 concentration of the gas in contact with the CO 2 absorbent 10 is 1% (predetermined concentration) or more and the humidity of the gas is 80% (predetermined humidity) or more. by “it, CO 2 absorption rate of CO 2 absorbent material 10 has been found to be sufficiently improved.
  • CO 2 absorption rate of CO 2 absorbing material of Patent Document 1 was 12%. Further, the CO 2 concentration of the inlet gas (introduced gas) was 500 ppm, and the inlet gas contained 1% moisture (water vapor). From this, when the temperature of the inlet gas is 20 ° C., the humidity of the inlet gas is estimated to be 43%.
  • CO 2 absorption rate of CO 2 absorbing material of Patent Document 2 was 9.4%. Further, the CO 2 concentration of the inlet gas (introduced gas) was 3000 ppm. The inlet gas is previously bubbled at 0 ° C. From this, when the temperature of the inlet gas is 20 ° C., the humidity of the inlet gas is estimated to be 28%.
  • the CO 2 absorbent of Patent Document 2 contains tetravalent lithium silicate (Li 4 SiO 4 ) as a main component, like the CO 2 absorbent 10.
  • Li 4 SiO 4 tetravalent lithium silicate
  • the chemical reaction formula when Li 4 SiO 4 absorbs CO 2 is the following formula (1), Li 4 SiO 4 + CO 2 ⁇ Li 2 SiO 3 + Li 2 CO 3 (1) It is expressed as
  • the CO 2 absorption rate exceeding 36.7% can be realized as described above. From this, the inventors can effectively exhibit the CO 2 absorption performance of Li 4 SiO 4 by “introducing a gas of high CO 2 concentration and high humidity into the CO 2 absorbent 10”. I guessed that. Hereinafter, this point will be described.
  • the inventors set the flow rate of the gas with a CO 2 concentration of 100% to 0.15 L / min, and the humidity of the gas to 80% with the humidifier 126, so that the high CO 2 A humidified gas with a concentration was prepared. That is, a gas with high CO 2 concentration and high humidity was produced.
  • the gas was introduced into the CO 2 absorption tube 130 as the inlet gas Gin.
  • Sample A CO 2 absorption time (CO 2 hours imbibed with) was 0 hours (0h), CO 2 absorbent material 10
  • Sample B CO 2 absorption time was 1 hour (1h), CO 2 absorbent material 10
  • Sample C CO 2 absorption time was 5 hours (5h), CO 2 absorbent material 10
  • Sample D was CO 2 absorption time for 18 hours (18h), the CO 2 absorbing material 10
  • Sample E CO 2 absorption time was 24 hours (24h), CO 2 absorbent material 10; Was made.
  • FIG. 5 is a graph showing an example of the results of measuring samples A to E using XRD.
  • the units of the horizontal axis and the vertical axis in the graph of FIG. 5 are the same as those of the graph of FIG. Note that the legends “Li 4 SiO 4 ” (inverted triangle mark) and “Li 2 CO 3 ” (circle mark) in FIG. 5 show the analysis results of Li 4 SiO 4 and Li 2 CO 3 as references, respectively.
  • Equation (2) at room temperature conditions, Li 4 SiO 4 contained in the CO 2 absorber 10 is water (H 2 O) assuming guided formula to react with CO 2 absorbent material 10 in the presence of It is.
  • Li 2 CO 3 is precipitated in the solid state.
  • the subsequent CO 2 absorption reaction in Li 4 SiO 4 is inhibited.
  • the CO 2 concentration of the gas (eg, inlet gas Gin) in contact with the CO 2 absorbent 10 is particularly high (eg, when the CO 2 concentration is 100%), the rate of the CO 2 absorption reaction in Li 4 SiO 4 . Will improve. Therefore, as compared with the case the CO 2 concentration is low, the time the surface of the Li 4 SiO 4 is covered with the Li 2 CO 3 is considered to be shortened.
  • the gas eg, inlet gas Gin
  • the CO 2 absorber 1 includes the CO 2 concentrating unit 11, the humidifying unit 12, and the CO 2 absorbent 10 in the order in which the gas G0 taken from the outside is introduced.
  • the CO 2 concentrating unit 11 increases the CO 2 concentration of the gas G0 to a predetermined concentration or more. That is, in the CO 2 concentration unit 11 gaseous CO 2 concentration is predetermined concentration or more G1 (hereinafter, a high CO 2 concentration gas) to generate, can be introduced the gas G1 to the humidifying unit 12.
  • G1 gaseous CO 2 concentration
  • G1 a high CO 2 concentration gas
  • the humidifying unit 12 increases the humidity of the gas G1 (high CO 2 concentration gas) to a predetermined humidity or higher. That is, in the humidifying unit 12, a gas G ⁇ b > 2 (hereinafter referred to as a high humidity gas) having a humidity equal to or higher than a predetermined humidity can be generated, and the gas G ⁇ b > 2 can be introduced into the CO 2 absorbent 10. Since the gas G1 is a high CO 2 concentration gas, the gas G2 is a gas having a CO 2 concentration of a predetermined concentration or higher and a humidity of a predetermined concentration or higher (hereinafter, high CO 2 concentration / high humidity gas). It becomes.
  • the CO 2 concentration unit 11 and the humidification unit 12 function as a supply unit that supplies the gas G 2 (high CO 2 concentration / high humidity gas) to the CO 2 absorbent 10. Therefore, by introducing the gas G2 into the CO 2 absorbing material 10, the CO 2 absorber 10 CO 2 absorption performance (more specifically, as described above, CO 2 absorption of Li 4 SiO 4 as the main component Performance) can be improved.
  • the CO 2 absorber 1 absorbs a predetermined amount of CO 2 concentration, the required amount of the CO 2 absorbent 10 can be reduced. Therefore, since the CO 2 absorber 1 can be downsized (eg, volume can be reduced), the convenience of the user of the CO 2 absorber 1 can be improved.
  • the CO 2 absorber 1 is particularly preferably used in a narrow sealed space (for example, in a vehicle or in a submarine).
  • the CO 2 absorption device 1 may be configured such that gas is introduced into the inside in the order of “humidification unit 12 ⁇ CO 2 concentration unit 11 ⁇ CO 2 absorbent 10”. That is, humidification and CO 2 concentration may be performed in this order on the gas to introduce a high CO 2 concentration / high humidity gas into the CO 2 absorbent 10. This also applies to each embodiment described later.
  • (1) in FIG. 6 (a) is a functional block diagram showing a configuration of a main part of the CO 2 absorber 1u (carbon dioxide absorber) as a modification of the CO 2 absorber 1.
  • the CO 2 absorbing device 1u has a configuration in which the humidifying unit 12 is omitted from the CO 2 absorbing device 1.
  • a gas G0 as a high-humidity gas is produced in advance in a device external to the CO 2 absorber 1 (eg, a device similar to the humidifying unit 12).
  • a device external to the CO 2 absorber 1 e.g, a device similar to the humidifying unit 12
  • the gas G0 when the gas G0 is taken into the CO 2 absorber 1, the gas G0 already has a sufficiently high humidity. Therefore, it is not necessary to humidify the gas in the humidifying unit 12, and the humidifying unit 12 can be omitted from the CO 2 absorber 1. That is, only the CO 2 concentration unit 11 can be used as the supply unit.
  • the CO 2 concentrating unit 11 concentrates the gas G0 (high humidity gas) with CO 2 to generate a gas G1u that is a high CO 2 concentration / high humidity gas. Then, the CO 2 concentrating unit 11 introduces the gas G1u (high CO 2 concentration / high humidity gas) into the CO 2 absorbent 10.
  • FIG. 6 (b) is a functional block diagram showing a configuration of a main part of the CO 2 absorber 1 v (carbon dioxide absorber) as another modification of the CO 2 absorber 1.
  • CO 2 absorber 1v is omitted from the configuration of the CO 2 concentration unit 11 from the CO 2 absorber 1.
  • a gas G0 as a high CO 2 concentration gas is produced in advance in a device external to the CO 2 absorber 1 (eg, a device similar to the CO 2 concentrating unit 11).
  • the gas G0 when the gas G0 is taken into the CO 2 absorber 1, the gas G0 already has a sufficiently high CO 2 concentration. Therefore, there is no need to gaseous CO 2 concentration in the CO 2 concentration unit 11, from the CO 2 absorber 1 may be omitted CO 2 concentration unit 11. That is, only the humidification part 12 can be used as a supply part.
  • the humidifying unit 12 humidifies the gas G0 (high CO 2 concentration gas) to generate a gas G2v that is a high CO 2 concentration / high humidity gas.
  • the humidifying unit 12 introduces the gas G2v (high CO 2 concentration / high humidity gas) into the CO 2 absorbent 10.
  • FIG. 6 (c) is a functional block diagram showing a configuration of a main part of the CO 2 absorber 1 w (carbon dioxide absorber) as yet another variation of the CO 2 absorber 1.
  • the CO 2 absorber 1w has a configuration in which the CO 2 concentrator 11 and the humidifier 12 are omitted from the CO 2 absorber 1.
  • a gas G0 as a high CO 2 concentration / high humidity gas is prepared in advance.
  • the gas G0 when the gas G0 is introduced into the CO 2 absorber 1, the gas G0 already has a sufficiently high CO 2 concentration and humidity. For this reason, both the CO 2 concentrating unit 11 and the humidifying unit 12 as the supply unit can be omitted from the CO 2 absorber 1.
  • the CO 2 absorber 1 w introduces the gas G 0 (high CO 2 concentration / high humidity gas) taken into the CO 2 absorbent 10 using a pump or a fan (not shown).
  • the gas G 0 high CO 2 concentration / high humidity gas
  • hardware elements such as a pump or a fan for taking in the gas G0 serve as a supply unit.
  • CO 2 absorber 1w when the CO 2 absorber 1w is provided in an electronic device such as an air purifier, or when a living organism (eg, a person or an animal) forcibly supplies the gas G0 to the CO 2 absorber 1w, A pump, a fan, or the like can be omitted from the CO 2 absorber 1w (see Embodiment 4 described later).
  • CO 2 absorber If omitted pump or fan or the like from 1 w, for example, CO 2 absorber openings (not shown) formed on the surface of the housing of 1 w (opening for taking gas G0 inside) is, Acts as a supply unit.
  • the CO 2 absorber may be configured to supply (introduce) a high CO 2 concentration / high humidity gas to the CO 2 absorbent 10. This also applies to each embodiment described later.
  • FIG. 7 is a functional block diagram illustrating a configuration of a main part of the CO 2 absorber 2 (carbon dioxide absorber) of the second embodiment.
  • CO 2 absorber 2 in the CO 2 absorber 1 embodiment 1, (i) CO 2 CO 2 concentration part 21 (the concentration part, the supply unit) respectively in the enrichment section 11 and the humidifier 12 and the humidifier 22 ( And (ii) a control unit 20, a detection unit 25, and a storage unit 90 are added.
  • the gas G0 taken into the CO 2 absorber 2 first passes through the detection unit 25. Then, the gas G 0 that has passed through the detection unit 25 is introduced into the CO 2 concentration unit 21. Thereafter, the gas G2 (high CO 2 concentration / high humidity gas) is introduced into the CO 2 absorbent 10 through the same path as in the first embodiment.
  • the configuration of the CO 2 concentrating unit 21 and the humidifying unit 22 will be described in detail later.
  • the detection unit 25 includes a CO 2 concentration sensor 251 (concentration detection unit) and a humidity sensor 252 (humidity detection unit).
  • the CO 2 concentration sensor 251 detects (measures) the CO 2 concentration of a gas (eg, gas G0).
  • the CO 2 concentration sensor 251 gives a detection value (detection result) of the CO 2 concentration to the control unit 20 (more specifically, a concentration control unit 201 described later).
  • the detection method of the CO 2 concentration in the CO 2 concentration sensor 251 is not particularly limited.
  • a method using a semiconductor sensor semiconductor method
  • an electrochemical method electrochemical method
  • an infrared absorption method or the like
  • any known gas concentration sensor may be used as the CO 2 concentration sensor 251.
  • the cost of the CO 2 concentration sensor 251 can be reduced, and (ii) the CO 2 concentration sensor 251 is given resistance to harsh environmental conditions.
  • the merit that it is possible is obtained.
  • a semiconductor such as SnO 2 or ZnO (eg, n-type semiconductor) is used. From the viewpoint of improving the selectivity of the detection target, SnO 2 added with La is used. Is particularly preferred.
  • the infrared absorption detection method when adopted, there are advantages such as (i) the sensitivity of the CO 2 concentration sensor 251 can be increased, and (ii) the selectivity of the detection target can be improved. can get.
  • an electrochemical detection method for example, a sodium ion conductor is used as the conductive ion species of the solid electrolyte.
  • the humidity sensor 252 detects the CO 2 humidity of gas (eg, gas G0).
  • the humidity sensor 252 gives the humidity detection value (detection result) to the control unit 20 (more specifically, the humidification control unit 202 described later).
  • the humidity detection method in the humidity sensor 252 is not particularly limited.
  • As the detection method an electric resistance type, a capacitance type, or the like may be used. Therefore, any known humidity sensor may be used as the humidity sensor 252.
  • the electric resistance type detection method is employed, there are advantages such as (i) the cost of the humidity sensor 252 can be reduced and (ii) the durability of the humidity sensor 252 can be improved.
  • the detection unit 25 can detect the CO 2 concentration and the humidity of the gas G0.
  • the control unit 20 comprehensively controls each unit (hardware element) of the CO 2 absorber 2.
  • the function of the control unit 20 may be realized by a CPU (Central Processing Unit) executing a program stored in the storage unit 90.
  • the storage unit 90 stores various programs executed by the control unit 20 and data used by the programs.
  • the control unit 20 includes a concentration control unit 201 and a humidification control unit 202.
  • concentration control unit 201 controls the concentration of the concentration control unit 201 and the humidification control unit 202.
  • humidification control unit 202 controls the concentration of the concentration control unit 201 and the humidification control unit 202.
  • the CO 2 concentrating unit 21 includes a concentrating path switching unit 211 and a CO 2 concentrator 212.
  • the CO 2 concentrator 212 is a member (apparatus) similar to the CO 2 concentrating unit 11 of the first embodiment.
  • the CO 2 concentrator 212 is similar to the CO 2 concentrating unit 11 in that a gas (eg, gas G0) is CO 2 concentrated to generate a high CO 2 concentration gas.
  • the CO 2 concentrator 212 is different from the CO 2 concentrating unit 11 in that it can be controlled by the concentration control unit 201 (more specifically, a CO 2 concentration setting unit 201c described later).
  • the concentration path switching unit 211 switches a path for sending a gas (eg, gas G0) that has flowed into the concentration path switching unit 211.
  • the concentration path switching unit 211 may be configured by a fan, a pump, a valve, a pipe, and the like (not shown). This also applies to the humidifying route switching unit 221 and the absorption route switching unit 31 described later (see FIGS. 9 and 12 described later).
  • the concentration path switching unit 211 includes (i) a path toward the humidifying unit 22 without passing through the CO 2 concentrator 212 (hereinafter referred to as a non-concentrating path), and (ii) the humidifying unit 22 through the CO 2 concentrator 212
  • the route (hereinafter referred to as the first gas delivery route) for sending the gas G0 is switched to either the route (hereinafter referred to as the concentration route). That is, the concentration path switching unit 211 selects either the concentration path or the non-concentration path as the first gas delivery path.
  • FIG. 8A shows a case where the concentration path switching unit 211 selects the non-concentration path as the first gas delivery path.
  • the gas G0 passing through the non-concentration path is introduced as it is into the humidification unit 22 as the gas G1. That, CO 2 concentration of the gas G0 by CO 2 concentrator 212 is not performed.
  • FIG. 8B shows a case where the concentration path switching unit 211 selects the concentration path as the first gas delivery path.
  • the gas G0 is introduced into the CO 2 concentrator 212 provided in the concentration path. Therefore, the gas G1 toward the humidifying unit 22 from the CO 2 concentrator 212, CO 2 is concentrated gas, a high CO 2 concentration gas.
  • the CO 2 concentrating unit 21 is configured to be able to switch whether or not to condense CO 2 with respect to the gas (gas G0) that passes through the CO 2 concentrating unit 22 toward the humidifying unit 22.
  • the operation of the CO 2 concentration unit 21 is controlled by a concentration control unit 201 described below.
  • the concentration control unit 201 includes a CO 2 concentration determination unit 201a, a concentration path switching control unit 201b, and a CO 2 concentration setting unit 201c.
  • the concentration control unit 201 controls the CO 2 concentration unit 21 based on the detection value (detection result) of the CO 2 concentration sensor 251 (that is, according to the CO 2 concentration of the gas G0).
  • the detection value of the CO 2 concentration sensor 251 also referred to as a CO 2 concentration detection value Dg.
  • the CO 2 concentration determination unit 201a acquires the CO 2 concentration detection value Dg from the CO 2 concentration sensor 251, and determines the magnitude of the CO 2 concentration detection value Dg and a predetermined CO 2 concentration setting value Ds (first setting value). Compare. Specifically, the CO 2 concentration determination unit 201a determines whether or not Dg ⁇ Ds. The CO 2 concentration determination unit 201a gives CO 2 concentration determination result information indicating its own determination result to each of the concentration path switching control unit 201b and the CO 2 concentration setting unit 201c.
  • CO 2 concentration setting Ds is the CO 2 concentration of the setting value included in the gas supplied to the CO 2 absorber 10.
  • the CO 2 concentration set value Ds may be set in advance when the CO 2 absorption device 2 is shipped, or may be set by the user.
  • the CO 2 concentration set value Ds only needs to be set to be equal to or higher than the predetermined concentration described above.
  • the CO 2 concentration set value Ds may be set equal to a predetermined concentration.
  • Concentrated path switching control unit 201b controls the concentrated path switching unit 211.
  • the CO 2 concentration setting unit 201c controls the CO 2 concentrator 212 based on the CO 2 concentration determination result information.
  • the concentration path switching control unit 201b causes the concentration path switching unit 211 to select the non-concentration path as the first gas delivery path when Dg ⁇ Ds.
  • the CO 2 concentration setting unit 201c may stop the CO 2 concentrator 212 when Dg ⁇ Ds. Thereby, when the non-concentration route is selected as the first gas delivery route (when the gas G0 is not introduced into the CO 2 concentrator 212), the power consumption (energy consumption) of the CO 2 absorber 2 can be reduced.
  • the concentration path switching control unit 201b causes the concentration path switching unit 211 to select the concentration path as the first gas delivery path when Dg ⁇ Ds.
  • the CO 2 concentration setting unit 201c operates the CO 2 concentrator 212 to perform CO 2 concentration on the gas G0.
  • the CO 2 concentration setting unit 201c operates the CO 2 concentrator 212 so that the CO 2 concentration of the gas after CO 2 concentration is equal to or higher than the CO 2 concentration set value Ds.
  • the CO 2 concentrator 212 can condense the gas G 0 with CO 2 and introduce the gas G 1, which is a high CO 2 concentration gas, into the humidifying unit 22.
  • FIGS. 9A and 9B are diagrams for explaining the configurations and operations of the humidification control unit 202 and the humidification unit 22, respectively.
  • the humidification unit 22 includes a humidification path switching unit 221 and a humidifier 222.
  • the humidifier 222 is a member (apparatus) similar to the humidifying unit 12 of the first embodiment.
  • the humidifier 222 is similar to the humidifier 12 in that it humidifies a gas (eg, gas G1) and generates a high-humidity gas (a gas whose humidity is equal to or higher than a predetermined humidity).
  • the humidifier 222 is different from the humidifier 12 in that the humidifier 222 can be controlled by the humidification controller 202 (more specifically, a humidity setting unit 202c described later).
  • the humidification path switching unit 221 switches the path for sending the gas (eg, gas G1) that has flowed into the humidification path switching unit 221.
  • the humidification path switching unit 221 includes (i) a path toward the CO 2 absorbent 10 without passing through the humidifier 222 (hereinafter referred to as a non-humidification path), and (ii) the CO 2 absorbent 10 via the humidifier 222.
  • the route (hereinafter referred to as the second gas delivery route) for sending the gas G1 is switched to either the route (hereinafter referred to as the humidification route). That is, the humidification path switching unit 221 selects either the humidification path or the non-humidification path as the second gas delivery path.
  • FIG. 9A shows a case where the humidification path switching unit 221 selects a non-humidification path as the second gas delivery path.
  • the gas G1 passing through the non-humidifying passage is introduced into the CO 2 absorber 10 as it is as the gas G2. That is, humidification of the gas G1 by the humidifier 222 is not performed.
  • FIG. 9B shows a case where the humidification path switching unit 221 selects the humidification path as the second gas delivery path.
  • the gas G1 is introduced into the humidifier 222 provided in the humidification path. Therefore, the gas G2 heading from the humidifier 222 toward the CO 2 absorbent 10 is a humidified gas and becomes a highly humidified gas. Since the gas G1 introduced from the CO 2 concentration unit 21 to the humidification unit 22 is already a high CO 2 concentration gas, the gas G2 becomes a high CO 2 concentration / high humidity gas.
  • the humidification unit 22 is configured so as to gas (gas G1) towards the CO 2 absorbent material 10 by passing through it, which is capable of switching whether to humidification.
  • the operation of the humidifying unit 22 is controlled by a humidifying control unit 202 described below.
  • the humidification control unit 202 includes a humidity determination unit 202a, a humidification path switching control unit 202b, and a humidity setting unit 202c.
  • the humidification control unit 202 controls the humidification unit 22 based on the detection value (detection result) of the humidity sensor 252 (that is, according to the humidity of the gas G0).
  • the detection value of the humidity sensor 252 is also referred to as a humidity detection value Hg.
  • the humidity determination unit 202a acquires the humidity detection value Hg from the humidity sensor 252, and compares the humidity detection value Hg with a predetermined humidity setting value Hs (second setting value). Specifically, the humidity determination unit 202a determines whether or not Hg ⁇ Hs. The humidity determination unit 202a gives humidity determination result information indicating its own determination result to each of the humidification path switching control unit 202b and the humidity setting unit 202c.
  • the humidity setting value Hs is a humidity setting value in the gas supplied to the CO 2 absorbent 10.
  • Humidity set value Hs may be have been previously set at the time of product shipment of the CO 2 absorber 2, it may be configurable by the user.
  • the humidity set value Hs only needs to be set to be equal to or higher than the predetermined humidity described above.
  • the humidity setting value Hs may be set equal to the predetermined humidity.
  • the humidification path switching control unit 202b controls the humidification path switching unit 221 based on the humidity determination result information.
  • the humidity setting unit 202c controls the humidifier 222 based on the humidity determination result information.
  • the humidification path switching control unit 202b causes the humidification path switching unit 221 to select the non-humidification path as the second gas delivery path when Hg ⁇ Hs.
  • the humidity setting unit 202c may stop the humidifier 222 when Dg ⁇ Ds. Thereby, when the non-humidification route is selected as the second gas delivery route (when the gas G1 is not introduced into the humidifier 222), the power consumption of the CO 2 absorber 2 can be reduced.
  • the humidification path switching control unit 202b causes the humidification path switching unit 221 to select the humidification path as the second gas delivery path.
  • the humidity setting unit 202c operates the humidifier 222 to humidify the gas G1. Specifically, the humidity setting unit 202c operates the humidifier 222 so that the humidity of the humidified gas is equal to or higher than the humidity setting value Hs.
  • the humidity setting unit 202c operates the humidifier 222 so that the humidity of the humidified gas is equal to or higher than the humidity setting value Hs.
  • gas G2 which is a high humidity gas to CO 2 absorber 10.
  • the gas G2 becomes a high CO 2 concentration / high humidity gas. That is, the gas G ⁇ b > 2 that is a high CO 2 concentration / high humidity gas is introduced into the CO 2 absorbent 10.
  • Figure 10 is a flowchart showing the flow of processing S1 ⁇ S7 of CO 2 absorption in the CO 2 absorber 2.
  • the power of the CO 2 absorber 2 is turned on, and the gas G 0 is taken into the CO 2 absorber 2.
  • the CO 2 concentration sensor 251 detects the CO 2 concentration of the gas G0, and gives the CO 2 concentration detection value Dg to the concentration control unit 201 (S1). Further, the humidity sensor 252 detects the humidity of the gas G0, and gives the humidity detection value Hg to the humidification control unit 202 (S2).
  • the CO 2 concentration determination unit 201a determines whether or not Dg ⁇ Ds (S3), and stores the CO 2 concentration determination result information indicating its own determination result as the concentration path switching control unit. 201b and the CO 2 concentration setting unit 201c.
  • the concentration path switching control unit 201b causes the concentration path switching unit 211 to select the non-concentration path as the first gas delivery path.
  • the CO 2 concentration unit 21 does not perform CO 2 concentration of the gas G0. Since the gas G0 is already a high CO 2 concentration gas, the CO 2 concentration unit 21 introduces the gas G0 as the gas G1 into the humidification unit 22 as it is.
  • the concentration path switching control unit 201b causes the concentration path switching unit 211 to select the concentration path as the first gas delivery path.
  • the CO 2 concentrating unit 21 (CO 2 concentrator 212) performs CO 2 concentration of the gas G0 and sets the CO 2 concentration of the gas after CO 2 compression to be equal to or higher than the CO 2 concentration set value Ds (S4). That, CO 2 concentration unit 21 generates a gas G1 is a high CO 2 concentration gas by CO 2 concentration, to introduce the gas G1 to the humidifying unit 22.
  • the humidity determination unit 202a determines whether or not Hg ⁇ Hs (S5), and determines the humidity determination result information indicating its own determination result as the humidification path switching control unit 202b and the humidity setting. It gives to each of the part 202c.
  • the humidification path switching control unit 202b causes the humidification path switching unit 221 to select the non-humidification path as the second gas delivery path.
  • the humidifying unit 22 does not humidify the gas G1. Since the gas G1 is already a high CO 2 concentration / high concentration gas, the humidifying unit 22 introduces the gas G1 as a gas G2 (high CO 2 concentration / high concentration gas) into the CO 2 absorbent 10 as it is (S7, Supply process).
  • the humidification path switching control unit 202b causes the humidification path switching unit 221 to select the humidification path as the second gas delivery path.
  • the humidifying unit 22 humidifies the gas G1, and sets the humidity of the gas after humidification to the humidity set value Hs or more (S7, supply process).
  • the humidifying unit 22, humidifying the generated gas G2 (high CO 2 concentration, high humidity gas) is introduced the gas G2 into the CO 2 absorbing material 10 (S7).
  • the gas G2 having a high CO 2 concentration and high humidity can be introduced into the CO 2 absorbent 10. Therefore, it is possible to similarly, improving the CO 2 absorption rate of CO 2 absorber 10 in the first embodiment.
  • the humidifying unit 22 may be disposed in the upstream of the CO 2 concentrating unit 21 in the gas introduction path. That is, the gas may be introduced into the CO 2 absorber 2 in the order of “detection unit 25 ⁇ humidification unit 22 ⁇ CO 2 concentration unit 21 ⁇ CO 2 absorbent 10”. That is, the order of S3 ⁇ S4 and S5 ⁇ S6 may be exchanged. This also applies to the third embodiment described later.
  • the CO 2 concentration unit 21 and the humidification unit 22 can be controlled in accordance with the detection results of the detection unit 25 (the CO 2 concentration sensor 251 and the humidity sensor 252). That is, the CO 2 concentrating unit 21 and the humidifying unit 22 can be controlled in accordance with the CO 2 concentration and the humidity of the gas G0 taken in by the CO 2 absorbing device 2, respectively. This allows controlled more precisely the CO 2 absorption amount of CO 2 absorber 10.
  • the CO 2 concentration unit 21 can selectively cause the CO 2 concentration to be performed selectively only when the gas G 0 needs to be concentrated with CO 2 (when the CO 2 concentration of the gas G 0 is low).
  • the humidification part 22 can be selectively humidified only when the necessity of humidifying the gas G0 is high (when the humidity of the gas G0 is low).
  • the power consumption of the CO 2 concentration unit 21 and the humidification unit 22 can be reduced as compared with the CO 2 concentration unit 11 and the humidification unit 12 of the first embodiment. That is, the power consumption of the CO 2 absorber 2, it is possible to reduce as compared to CO 2 absorber 1.
  • FIG. 11 is a functional block diagram showing the configuration of the main part of the CO 2 absorber 3.
  • the CO 2 absorption device 3 is the same as the CO 2 absorption device 2 of the second embodiment, in which (i) the control unit 20 is replaced with the control unit 30 and (ii) an absorption path switching unit 31 (supply path switching unit) is added. It is a configuration.
  • the CO 2 absorption device 3 is different from the CO 2 absorption device 2 in that the detection unit 25 is disposed downstream of the CO 2 concentration unit 21 and the humidification unit 22 in the gas introduction path.
  • the gas absorbs CO 2 in the order of “CO 2 concentrating unit 21 ⁇ humidifying unit 22 ⁇ detecting unit 25 ⁇ absorption path switching unit 31 ⁇ CO 2 absorbent 10”. It is introduced inside the device 3.
  • the detector 25 the gas G2 is introduced from the humidifying unit 22. That is, the detection unit 25 (the CO 2 concentration sensor 251 and the humidity sensor 252) detects the CO 2 concentration and humidity of the gas G2. Then, the gas G ⁇ b> 2 that has passed through the detection unit 25 is introduced into the absorption path switching unit 31.
  • the gas G2 passing through the absorption path switching unit 31 and heading for the CO 2 absorbent 10 is referred to as a gas G3.
  • control unit 30 has a configuration in which an absorption path switching control unit 301 (supply path switching control unit) is further added to the control unit 20 of the second embodiment.
  • absorption path switching control unit 301 supply path switching control unit
  • absorption path switching unit 31 operations of the absorption path switching control unit 301 and the absorption path switching unit 31 will be described in detail.
  • FIGS. 12A and 12B are diagrams for explaining operations of the absorption path switching control unit 301 and the absorption path switching unit 31, respectively.
  • the absorption path switching unit 31 switches a path for sending a gas (eg, gas G2) that has flowed into the absorption path switching unit 31.
  • the absorption path switching unit 31 includes (i) a path toward (returning) the CO 2 concentrating unit 21 (hereinafter referred to as a non-absorption path) and (ii) a path toward (advancing) the CO 2 absorbent 10 (hereinafter referred to as an absorption path). And a path for sending the gas G2 (hereinafter referred to as a third gas delivery path).
  • the concentration path switching unit 211 selects either the absorption path or the non-absorption path as the third gas delivery path.
  • Absorption pathway by contact
  • the absorption path may be referred to as a supply path or a contact path.
  • non-absorbing pathway by not contacting) the gas to by not supplying the CO 2 absorbent material 10 is a path to the CO 2 absorbing material 10 does not absorb the CO 2 in the gas.
  • the non-absorption path may be referred to as a non-feed path or a non-contact path.
  • FIG. 12A shows a case where the absorption path switching unit 31 selects a non-absorption path as the third gas delivery path.
  • the gas G2 in (a) of FIG. 12 is not a high CO 2 concentration / high humidity gas.
  • the gas G2 is returned to the CO 2 concentrating unit 21. Accordingly, the gas G2 circulates in the order of “absorption path switching unit 31 ⁇ CO 2 concentrating unit 21 ⁇ humidifying unit 22 ⁇ detecting unit 25 ⁇ absorption path switching unit 31”. That is, before introducing the gas G2 into the CO 2 absorbing material 10, CO 2 concentration in the CO 2 concentration portion 21, and the humidifying the humidifying unit 22 can be repeated to gas G2.
  • FIG. 12B shows a case where the absorption path switching unit 31 selects the absorption path as the third gas delivery path.
  • the gas G2 in FIG. 12B is assumed to be a high CO 2 concentration / high humidity gas.
  • the gas G2 (high CO 2 concentration / high humidity gas) is directly introduced into the CO 2 absorbent 10 as the gas G3.
  • the operation of the absorption path switching unit 31 is controlled by the absorption path switching control unit 301.
  • the absorption path switching control unit 301 acquires the CO 2 concentration determination result information from the CO 2 concentration determination unit 201a and the humidity determination result information from the humidity determination unit 202a.
  • the absorption path switching control unit 301 controls the absorption path switching unit 31 based on the CO 2 concentration determination result information and the humidity determination result information. That is, the absorption path switching control unit 301, in accordance with the CO 2 concentration detection value Dg and the humidity detected values Hg, controls the absorption path switching unit 31.
  • the absorption path switching control unit 301 uses the absorption path switching unit 31 as the third gas delivery path when the condition “Dg ⁇ Ds and Hg ⁇ Hs” (hereinafter, the absorption permission condition) is satisfied. May be selected.
  • the absorption permission condition is satisfied, the gas G2 is a high CO 2 concentration / high humidity gas. Therefore, the gas G2 by introducing the CO 2 absorbent material 10 as a gas G3, it becomes possible to sufficiently improve the CO 2 absorption rate of CO 2 absorber 10.
  • the absorption path switching control unit 301 may cause the absorption path switching unit 31 to select the non-absorption path as the third gas delivery path when the absorption permission condition is not satisfied.
  • FIG. 13 is a flowchart showing the flow of processing S11 ⁇ S17 of the CO 2 absorption in the CO 2 absorber 3. Since the contents themselves of the processes S11 to S17 are the same as the processes S1 to S7 of FIG.
  • the flowchart of FIG. 13 is different from the process flow “go to S5 after S4” in the flowchart of FIG. 10 in the process flow “return to S11 after S14”. This is because when Dg ⁇ Ds (NO in S13), the absorption permission condition is not satisfied, and the gas G2 is returned to the CO 2 concentrating unit 21 by the absorption path switching unit 31.
  • the absorption path switching unit 31 permits the CO 2 absorbent 10 to absorb CO 2 contained in the gas G2 (gas G3) only when the absorption permission condition is satisfied.
  • the absorption path switching unit 31 and the absorption path switching control unit 301 are provided, so that the CO 2 absorbent 10 has the CO 2 of the gas G 2 in accordance with the CO 2 concentration and humidity of the gas G 2. Whether or not 2 is absorbed can be selected.
  • the gas G3 (high CO 2 concentration / high humidity gas) is changed to CO only when the gas G2 (gas G3) is a high CO 2 concentration / high humidity gas. 2 can be introduced into the absorbent material 10. Therefore, only if it is possible to realize a high CO 2 absorption rate to CO 2 absorber 10, it is possible to perform the CO 2 absorption to the CO 2 absorber 10. Therefore, the CO 2 absorbent 10 can be used more effectively.
  • the CO 2 absorber 3 by circulating gas G2, CO 2 concentration in the CO 2 concentration portion 21, and can be repeated humidification in the humidifying unit 22. That is, CO 2 concentration and humidification can be repeatedly performed on the gas G2 until the gas G2 becomes a high CO 2 concentration / high humidity gas. Therefore, the gas G3 (high CO 2 concentration / high humidity gas) can be introduced to the CO 2 absorbent 10 more reliably.
  • the CO 2 absorber 3 is suitable when it is preferable to set, for example, the CO 2 concentration set value Ds and the humidity set value Hs to large values.
  • the humidifying unit 22 may be disposed in the front stage of the CO 2 concentrating unit 21.
  • the above-described non-absorption path may be set as a path for “returning the gas flowing into the absorption path switching unit 31 to the humidification unit 22”.
  • Embodiment 4 The following describes Embodiment 4 with reference to FIG. In Embodiment 4, an example of an electronic device including the CO 2 absorber according to one aspect of the present disclosure will be described.
  • FIG. 14 is a diagram illustrating a schematic configuration of an air cleaner 100 (electronic apparatus) according to the fourth embodiment.
  • the arrows in FIG. 14 indicate the flow of air taken in by the air cleaner 100.
  • the air purifier 100 includes a CO 2 absorber 1, a filter 101, and a fan 102.
  • the fan 102 is a blower that takes air into the air purifier 100.
  • the operation of the fan 102 is controlled by a control unit (not shown) provided in the air cleaner 100.
  • the carbon dioxide absorber eg, CO 2 absorbers 2 and 3
  • the control unit eg, the controllers 20 and 30.
  • the operation of the fan 102 may be controlled by the control unit of the CO 2 absorber.
  • the filter 101 cleans the air taken into the air purifier 100 by the operation of the fan 102.
  • the type of the filter 101 is not particularly limited, and examples include a deodorizing air conditioning filter, a formaldehyde absorbing air conditioning filter, an antibacterial / dust collecting air conditioning filter, and a combination of these filters.
  • the CO 2 absorber (eg, CO 2 absorbers 2 and 3) according to an aspect of the present disclosure may detect the CO 2 concentration of air by the detection unit 25.
  • the CO 2 absorber can control the CO 2 absorption rate of CO 2 absorber 10 in accordance with the CO 2 concentration in the air.
  • the air purifier 100 is cleaned by the filter 101, and, CO 2 concentration by the CO 2 absorbing device capable of delivering a regulated air to an appropriate value.
  • the air cleaner 100 can provide the user with air that is more suitable for the health of the user.
  • the air purifier 100 operates the fan 102 to perform both (i) intake of air for air purification in the filter 101 and (i) intake of air into the CO 2 absorber 1. be able to.
  • the fan 102 is shared between the filter 101 (member related to the air cleaning function) and the CO 2 absorber 1 (member related to the CO 2 absorption function). Therefore, according to the configuration, as compared with the case of providing the fan separately for each of the filters 101 and CO 2 absorber 1, it can reduce the number of parts. For this reason, the manufacturing cost of the air cleaner 100 can be reduced.
  • the filter 101 removes a substance that inhibits the detection of the CO 2 concentration in the detection unit 25 (hereinafter referred to as a detection inhibitor).
  • the detection inhibitor is, for example, dust in the air.
  • the detection unit 25 can detect the CO 2 concentration with respect to the air from which the detection inhibitor is removed by the filter 101. For this reason, it becomes possible to more accurately detect the CO 2 concentration by eliminating the influence of the detection inhibitor. In addition, it is possible to prevent a detection inhibition substance from adhering to the detection unit 25 and a decrease in detection accuracy after the detection inhibition substance has adhered. Therefore, the CO 2 absorption device can adjust the CO 2 absorption rate more accurately over a long period of time.
  • the air cleaner 100 was illustrated as an example of an electronic device, the said electronic device is not limited to this.
  • the electronic device has only to comprise a CO 2 absorption device according to one embodiment of the present disclosure, for example, dehumidifier, humidifier, or may be air conditioner or the like.
  • the CO 2 absorber when the CO 2 absorber is provided in a dehumidifier or a humidifier, it is possible to provide air whose humidity and CO 2 concentration are adjusted to appropriate values. Further, if the CO 2 is provided absorber 1 to the air conditioner can provide air temperature and CO 2 concentration is adjusted to an appropriate value. Thus, the CO 2 absorber may be provided in various devices that provide a comfortable air environment for the user.
  • a CO 2 absorber is mounted on the dehumidifier, when a semiconductor sensor is used as the detection unit 25, it is preferable to provide a dehumidification unit instead of the filter 101 described above. In this case, the CO 2 concentration of the air after dehumidification can be detected by the detection unit 25 (semiconductor sensor) by causing the CO 2 absorber to take in the air dehumidified in the dehumidification unit.
  • the detection accuracy of a gas (eg, CO 2 ) concentration by a semiconductor sensor is easily affected by moisture (humidity). Therefore, according to this configuration, it is possible to prevent the reliability of detection of the CO 2 concentration in the detection unit 25 (semiconductor sensor) from being reduced due to the presence of moisture. Therefore, it is possible to detect the CO 2 concentration more accurately. Further, it is possible to prevent water vapor from adhering to the detection unit 25 itself.
  • a gas eg, CO 2
  • the CO 2 absorption device is desirably used in a space where ventilation can be restricted. This is because when the ventilation is restricted in a space where ventilation can be restricted, the CO 2 concentration in the air increases due to the CO 2 contained in human exhalation or the like.
  • an electronic device for example, the air purifier 100
  • the air cleaner 100 may be used as an in-vehicle air cleaner, for example.
  • the “space where ventilation can be restricted” means a sealed space, an indoor space where ventilation can be restricted, an indoor space, or an interior space.
  • “Ventilation-restrictable space” means to voluntarily ventilate (open a window, operate a ventilation fan, operate a ventilating device, operate a device such as a vacuum device to create a negative pressure) In other words, the space can be restricted or prohibited.
  • control blocks (particularly the control units 20 and 30) of the CO 2 absorbers 1 to 3 may be realized by a logic circuit (hardware) formed in an integrated circuit (IC chip) or the like, or a CPU (Central Processing Unit). ) May be implemented by software.
  • the CO 2 absorbers 1 to 3 include a CPU that executes instructions of a program that is software that implements each function, and a ROM (Read Only Memory) or a storage device (these are referred to as “recording media”), a RAM (Random Access Memory) for expanding the program, and the like. And the objective of this indication is achieved when a computer (or CPU) reads and runs the said program from the said recording medium.
  • a “non-temporary tangible medium” such as a tape, a disk, a card, a semiconductor memory, a programmable logic circuit, or the like can be used.
  • the program may be supplied to the computer via an arbitrary transmission medium (such as a communication network or a broadcast wave) that can transmit the program.
  • an arbitrary transmission medium such as a communication network or a broadcast wave
  • one aspect of the present disclosure can also be realized in the form of a data signal embedded in a carrier wave in which the program is embodied by electronic transmission.
  • Carbon dioxide absorber from a gas containing the moisture and carbon dioxide, the carbon dioxide absorbent for absorbing carbon dioxide contained in the in the gas (CO 2 absorption
  • a carbon dioxide absorption device provided with a material 10), wherein the carbon dioxide absorption material contains tetravalent lithium silicate (Li 4 SiO 4 ), has a carbon dioxide concentration of 1% or more, and humidity Is provided with a supply unit (for example, the CO 2 concentrating unit 11 and the humidifying unit 12) that supplies a gas having a relative humidity of 80% or more (for example, gas G2) to the carbon dioxide absorbent.
  • a supply unit for example, the CO 2 concentrating unit 11 and the humidifying unit 12
  • a gas having a CO 2 concentration of 1% (predetermined concentration) or higher and a relative humidity of 80% (predetermined humidity) or higher” high CO 2 concentration / high humidity. gas
  • the supply unit because a high CO 2 concentration and high humidity gas can be supplied to the CO 2 absorbing material, to improve the CO 2 absorption rate of the CO 2 absorbent material than conventional It becomes possible. For example, as shown in FIG. 4 described above, a CO 2 absorption rate exceeding “36.7%” can be realized.
  • the carbon dioxide absorption device is the carbon dioxide absorption device according to aspect 1, wherein the concentration unit (CO 2 concentration unit 11) that increases the carbon dioxide concentration of the gas (e.g., gas G0) taken in by the carbon dioxide absorption device. Further, the above-mentioned supply unit is further provided, and the concentration unit preferably supplies a gas (for example, gas G1) after increasing the carbon dioxide concentration to the carbon dioxide absorbent.
  • the concentration unit CO 2 concentration unit 11
  • the concentration unit preferably supplies a gas (for example, gas G1) after increasing the carbon dioxide concentration to the carbon dioxide absorbent.
  • the concentration unit increases the CO 2 concentration of the gas. Can do. Therefore, even if the CO 2 concentration of the gas captured CO 2 absorber is low, it is possible to improve the CO 2 absorption rate of CO 2 absorbing material.
  • a carbon dioxide absorption device is the above aspect 2, wherein the concentration detection unit (CO 2 concentration sensor 251) that detects the carbon dioxide concentration of the gas taken in by the carbon dioxide absorption device, and the concentration detection unit. It is preferable to further include a concentration control unit (201) that controls the concentration unit based on the detection result (CO 2 concentration detection value Dg).
  • the CO 2 concentration of the gas captured CO 2 absorption device can control the concentration unit. Therefore, it is possible to control the CO 2 absorption rate of CO 2 absorption material more accurately.
  • the carbon dioxide absorption device is the first set value (CO 2 concentration set value) which is a set value of the concentration of carbon dioxide contained in the gas supplied to the carbon dioxide absorbent in the aspect 3. Ds) is set in advance, the first set value is 1% or more, and the concentration control unit is set when the carbon dioxide concentration detected by the concentration detection unit is lower than the first set value. It is preferable to increase the carbon dioxide concentration of the gas taken in by the carbon dioxide absorber into the concentrating part.
  • the concentration unit can increase the CO 2 concentration of the gas only when the CO 2 concentration detected by the concentration detection unit is lower than the first set value.
  • the CO 2 concentration detected by the concentration detection unit is equal to or higher than the first set value (when it is less necessary to increase the CO 2 concentration of the gas by the concentration unit)
  • the CO 2 of the gas is supplied to the concentration unit.
  • the operation of increasing the concentration (CO 2 concentration) can be prevented. Therefore, the power consumption of the CO 2 absorber can be reduced.
  • the carbon dioxide absorption device according to aspect 5 of the present disclosure is the gas supply device according to any one of aspects 1 to 4, wherein the humidification unit (12) that increases the humidity of the gas taken in by the carbon dioxide absorption device is the supply unit. Furthermore, it is preferable that the humidification unit supplies a gas (for example, gas G2) after increasing the humidity to the carbon dioxide absorbent.
  • a gas for example, gas G2
  • the humidity of the gas taken in by the CO 2 absorber is low (eg, less than 80% relative humidity)
  • the humidity of the gas can be increased by the humidifying unit. Therefore, even when the humidity of the gas captured CO 2 absorber is low, it is possible to improve the CO 2 absorption rate of CO 2 absorbing material.
  • the carbon dioxide absorption device is the above-described aspect 5, wherein the humidity detection unit (humidity sensor 252) that detects the humidity of the gas taken in by the carbon dioxide absorption device, and the detection result of the humidity detection unit ( It is preferable to further include a humidification control unit (202) that controls the humidification unit based on the humidity detection value Hg).
  • the humidity detection unit humidity sensor 252 that detects the humidity of the gas taken in by the carbon dioxide absorption device
  • Hg humidity detection unit
  • a second set value (humidity set value Hs) that is a set value of humidity in the gas supplied to the carbon dioxide absorbent is set in advance.
  • the second set value is a value of relative humidity of 80% or more, and when the humidity detected by the humidity detection unit is lower than the second set value, the humidification control unit It is preferable to increase the humidity of the gas taken in by the carbon dioxide absorber.
  • the humidity of the said gas can be increased by the concentration part. That is, when the humidity detected by the humidity detection unit is equal to or higher than the second set value (when it is less necessary to increase the humidity of the gas by the humidification unit), the operation of increasing the humidity of the gas to the humidification unit ( (Humidification) can not be performed. Therefore, the power consumption of the CO 2 absorber can be reduced.
  • a carbon dioxide absorption device is the carbon dioxide absorption device according to any one of aspects 1 to 7, wherein the concentration detection unit detects the carbon dioxide concentration of the gas taken in by the carbon dioxide absorption device, and the humidity of the gas.
  • the gas e.g., gas G2
  • the supply path switching unit (absorption path switching unit 31) that switches between the non-supply path that is not the supply path, the concentration detection unit, and the detection result of the humidity detection unit, the supply path switching unit It is preferable to further include a supply switching control unit (absorption path switching control unit 301) to be controlled.
  • the CO 2 concentration and humidity in the CO 2 absorber is captured gas, whether or not can be selected to absorb CO 2 of the gas in the CO 2 absorbing material.
  • the carbon dioxide absorption device is the carbon dioxide absorption device according to aspect 8, in which the first set value that is the set value of the concentration of carbon dioxide contained in the gas supplied to the carbon dioxide absorbent and the humidity in the gas A second set value, which is a set value, is set in advance, the first set value is a value of 1% or more, the second set value is a value of a relative humidity of 80% or more, and
  • the supply switching control unit is configured to supply the supply It is preferable to cause the route switching unit to switch to the supply route.
  • the gas is high CO 2 concentration and high humidity gas, it can be supplied to the gas to the CO 2 absorbing material. That is, only if it is possible to realize a high CO 2 absorption rate CO 2 absorbent material, it is possible to absorb the CO 2 in the CO 2 absorber. Therefore, the CO 2 absorbent can be used more effectively.
  • the carbon dioxide absorption device includes, in the aspect 9, the concentration unit that increases the carbon dioxide concentration of the gas taken in by the carbon dioxide absorption device, and the humidification unit that increases the humidity of the gas. And (ii) when the carbon dioxide concentration detected by the concentration detector is lower than the first set value, and (ii) when the humidity detected by the humidity detector is the first In at least one of cases where the value is lower than 2 set values, the supply switching control unit causes the supply path switching unit to switch to the non-supply path, and the gas is supplied to the concentrating unit and the humidifying unit. It is preferable to reintroduce to the part.
  • the gas is not a high CO 2 concentration and high humidity gas until the gas has a higher CO 2 concentration and high humidity gas, can be repeated CO 2 concentration and humidified. Therefore, a high CO 2 concentration / high humidity gas can be supplied to the CO 2 absorbent more reliably.
  • the carbon dioxide absorption method is a carbon dioxide using a carbon dioxide absorbent that absorbs carbon dioxide contained in the gas from a gas containing moisture and carbon dioxide.
  • the carbon dioxide absorbent contains tetravalent lithium silicate, a gas having a carbon dioxide concentration of 1% or more and a relative humidity of 80% or more is treated as the carbon dioxide.
  • a supply step of supplying the absorbent material is a carbon dioxide using a carbon dioxide absorbent that absorbs carbon dioxide contained in the gas from a gas containing moisture and carbon dioxide.
  • the carbon dioxide absorbent contains tetravalent lithium silicate, a gas having a carbon dioxide concentration of 1% or more and a relative humidity of 80% or more is treated as the carbon dioxide.
  • the electronic apparatus (air purifier 100) preferably includes the carbon dioxide absorber according to any one of the first to tenth aspects.
  • the carbon dioxide absorption method according to one aspect of the present disclosure is a carbon dioxide absorption method using a carbon dioxide absorbent mainly composed of Li 4 SiO 4 for processing a gas containing carbon dioxide, Has a carbon dioxide concentration and humidity above a predetermined level.
  • carbon dioxide absorbing device provides a carbon dioxide absorbent mainly composed of Li 4 SiO 4, the carbon dioxide concentration can be increased carbon dioxide concentration of the gas containing carbon dioxide A concentration unit, and a humidification unit capable of increasing the humidity of the gas containing carbon dioxide.
  • the carbon dioxide absorption device includes a detection unit that detects a carbon dioxide concentration and humidity of a gas containing the carbon dioxide, and the carbon dioxide detected by the detection unit. And a control unit for controlling the carbon dioxide concentration concentrating unit and the humidifying unit based on the carbon dioxide concentration and humidity of the gas.
  • the carbon dioxide absorption device includes a carbon dioxide absorbent mainly composed of Li 4 SiO 4 , a detection unit that detects a carbon dioxide concentration and humidity of a gas containing carbon dioxide, Based on the carbon dioxide concentration and the humidity of the gas containing the carbon dioxide detected by the switching unit that switches whether the gas containing the carbon dioxide is brought into contact with the carbon dioxide absorbent, or the detection unit A control unit that controls the switching unit.
  • the carbon dioxide absorption device includes a carbon dioxide concentration concentration unit capable of increasing a carbon dioxide concentration of the gas containing carbon dioxide, and a humidity of the gas containing carbon dioxide. And a humidifying section that can be raised.
  • a carbon dioxide absorption method is a carbon dioxide absorption method using a carbon dioxide absorbent mainly composed of Li 4 SiO 4 for processing a gas containing carbon dioxide, the carbon dioxide absorption method described above.
  • the carbon dioxide concentration and humidity of the gas containing carbon are detected by the detection unit, and the carbon dioxide concentration and humidity of the gas containing carbon dioxide detected by the detection unit are both equal to or higher than the predetermined concentration and humidity.
  • the gas containing carbon dioxide is brought into contact with the carbon dioxide absorbent.
  • the carbon dioxide concentration and / or humidity of the gas containing the carbon dioxide detected by the detection unit is a predetermined concentration and / or humidity.
  • carbon dioxide is absorbed by preventing the gas containing carbon dioxide from coming into contact with the carbon dioxide absorbent.
  • the carbon dioxide concentration and / or humidity of the gas containing the carbon dioxide detected by the detection unit is a predetermined concentration and / or humidity. If it is less than the carbon dioxide concentration concentration section and / or the humidification section, the carbon dioxide concentration and / or humidity of the gas containing carbon dioxide is set to a predetermined concentration and / or higher than the humidity. The gas whose carbon dioxide concentration and / or humidity is increased to a predetermined concentration and / or higher than the humidity is brought into contact with the carbon dioxide absorbent.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Analytical Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Gas Separation By Absorption (AREA)

Abstract

Le but de la présente invention est d'améliorer davantage le rapport d'absorption de CO2 dans un matériau d'absorption de CO2 par rapport à l'état de la technique. Un matériau d'absorption de CO2 (10) pour absorber le CO2 contenu dans un gaz contenant de l'eau et le CO2 à partir du gaz contient un silicate de lithium tétravalent. Un dispositif d'absorption de CO2 (1) comprend : une section de concentration en CO2(11) qui sert de section d'alimentation pour fournir un gaz (G2) ayant une concentration en CO2 de 1 % ou plus et une humidité relative de 80 % ou plus à un matériau d'absorption de CO2 (10) ; et une section d'humidification (12).
PCT/JP2018/004766 2017-03-15 2018-02-13 Dispositif d'absorption de dioxyde de carbone, procédé d'absorption de dioxyde de carbone, et dispositif électronique WO2018168290A1 (fr)

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JP2017050096 2017-03-15
JP2017140082 2017-07-19
JP2017-140082 2017-07-19

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003126688A (ja) * 2001-10-26 2003-05-07 Toshiba Corp 炭酸ガス吸収材、その使用方法およびその再生方法
JP2005013952A (ja) * 2003-06-27 2005-01-20 Toshiba Ceramics Co Ltd 炭酸ガス吸収材
JP2006103974A (ja) * 2004-09-30 2006-04-20 Toshiba Ceramics Co Ltd 炭酸ガス分離回収装置
JP2013022577A (ja) * 2011-07-26 2013-02-04 Nippon Telegr & Teleph Corp <Ntt> 二酸化炭素回収方法および装置
WO2015125355A1 (fr) * 2014-02-21 2015-08-27 シャープ株式会社 Appareil de régulation de concentration en dioxyde de carbone et appareil électronique
WO2016208718A1 (fr) * 2015-06-26 2016-12-29 シャープ株式会社 Matériau absorbant le dioxyde de carbone, pastille et filtre
WO2017018160A1 (fr) * 2015-07-27 2017-02-02 シャープ株式会社 Système de conditionnement d'air et unité d'absorption de dioxyde de carbone

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003126688A (ja) * 2001-10-26 2003-05-07 Toshiba Corp 炭酸ガス吸収材、その使用方法およびその再生方法
JP2005013952A (ja) * 2003-06-27 2005-01-20 Toshiba Ceramics Co Ltd 炭酸ガス吸収材
JP2006103974A (ja) * 2004-09-30 2006-04-20 Toshiba Ceramics Co Ltd 炭酸ガス分離回収装置
JP2013022577A (ja) * 2011-07-26 2013-02-04 Nippon Telegr & Teleph Corp <Ntt> 二酸化炭素回収方法および装置
WO2015125355A1 (fr) * 2014-02-21 2015-08-27 シャープ株式会社 Appareil de régulation de concentration en dioxyde de carbone et appareil électronique
WO2016208718A1 (fr) * 2015-06-26 2016-12-29 シャープ株式会社 Matériau absorbant le dioxyde de carbone, pastille et filtre
WO2017018160A1 (fr) * 2015-07-27 2017-02-02 シャープ株式会社 Système de conditionnement d'air et unité d'absorption de dioxyde de carbone

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