JP2006061758A - Carbon dioxide remover - Google Patents

Carbon dioxide remover Download PDF

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JP2006061758A
JP2006061758A JP2004244064A JP2004244064A JP2006061758A JP 2006061758 A JP2006061758 A JP 2006061758A JP 2004244064 A JP2004244064 A JP 2004244064A JP 2004244064 A JP2004244064 A JP 2004244064A JP 2006061758 A JP2006061758 A JP 2006061758A
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carbon dioxide
adsorption
moisture
material
adsorbing
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JP2004244064A
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Harushige Boku
Takeyoshi Okawa
Tomoji Takada
剛義 大川
春成 朴
智司 高田
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Daikin Ind Ltd
ダイキン工業株式会社
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02CCAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
    • Y02C10/00CO2 capture or storage
    • Y02C10/08Capture by adsorption

Abstract

<P>PROBLEM TO BE SOLVED: To improve carbon dioxide removing performance of an carbon dioxide remover by applying an adsorption material capable of effectively absorbing/desorbing carbon dioxide in air to the carbon dioxide scrubber. <P>SOLUTION: The adsorption material (40) having a functional group capable of selectively absorbing/desorbing carbon dioxide is used as the adsorption material of an adsorption means. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a carbon dioxide removing device provided with an adsorption means for adsorbing and desorbing carbon dioxide in the air, and particularly relates to an adsorption material used for the adsorption means.

  In indoor spaces such as buildings and residences, there is a tendency for indoors to be airtight or highly insulated to save energy related to air conditioning, but as a result, indoor ventilation is insufficient, May increase the carbon dioxide concentration. For this reason, for example, as a conventional technique for suppressing the carbon dioxide concentration in the indoor space to a predetermined level or less (for example, 1000 ppm or less as defined in the Building Management Law), a carbon dioxide removal device including an adsorbing unit is known.

  For example, the carbon dioxide removal device disclosed in Patent Document 1 includes a supply passage and an exhaust passage. In the supply passage, indoor air flowing in from the room flows and is supplied to the room. An air supply fan is disposed in the supply passage. On the other hand, in the exhaust passage, outdoor air flowing in from outside flows and is discharged to the outside. An exhaust fan is disposed in the exhaust passage.

  The carbon dioxide removing device includes an adsorption rotor on which an adsorbing material made of an inorganic material such as silica, alumina, calcium oxide is supported as an adsorbing means for adsorbing and desorbing carbon dioxide in room air. The adsorption rotor is configured to be rotatable while straddling the supply passage and the exhaust passage. The adsorption rotor includes an adsorption unit located in the supply passage and a desorption unit located in the exhaust passage. Further, in the exhaust passage, in the vicinity of the desorption portion of the adsorption rotor, a regenerating unit is provided that desorbs carbon dioxide adsorbed on the adsorbent material by heating the adsorbent material.

  In the configuration of the carbon dioxide removing apparatus as described above, when the air supply / exhaust fan is operated and the adsorption rotor rotates, the indoor air flows through the air supply passage and passes through the adsorption portion of the adsorption rotor. Here, the carbon dioxide in the room air is adsorbed in the adsorption unit. The air from which carbon dioxide has been adsorbed and removed is supplied to the indoor space.

  On the other hand, outdoor air flows through the exhaust passage and passes through the desorption portion of the adsorption rotor. Here, the regeneration means heats the desorption part to a predetermined temperature. For this reason, when the adsorbing material in which carbon dioxide has been adsorbed by the adsorption unit is displaced to the desorption unit by the rotation of the adsorption rotor, carbon dioxide is desorbed from the desorption unit, and this carbon dioxide is imparted to the outdoor air. And the outdoor air to which carbon dioxide was given is discharged to the outdoor space.

As described above, in the adsorption rotor, the predetermined portion of the adsorbent material repeats the adsorption and desorption of carbon dioxide while alternately displacing the adsorption portion and the desorption portion. As a result, this carbon dioxide removal device can continuously remove carbon dioxide in the indoor space without reducing the carbon dioxide adsorption capacity of the adsorbent material.
JP 2003-19435 A

  As described above, the carbon dioxide removal device disclosed in Patent Document 1 uses an inorganic material such as silica, alumina, or calcium oxide as an adsorbing material that adsorbs and desorbs carbon dioxide. However, it is generally known that these adsorbing materials such as silica and alumina also have an adsorbing ability for components to be treated other than carbon dioxide (harmful components, odor components, moisture, etc.). For this reason, the adsorption capacity of these adsorbing materials is reduced by the amount by which the harmful components and odor components are adsorbed, and carbon dioxide in the air can be efficiently removed by these adsorbing materials. It was difficult.

  The present invention was devised in view of such problems, and its purpose is to apply an adsorbent material capable of effectively adsorbing and desorbing carbon dioxide in the air in a carbon dioxide removing device. This is to improve the carbon dioxide removal performance of this carbon dioxide removal device.

  In the present invention, an adsorption material that selectively adsorbs and desorbs carbon dioxide is used as an adsorption means for adsorbing and desorbing carbon dioxide.

  More specifically, the first invention is premised on a carbon dioxide removing device provided with an adsorbing means (30) for adsorbing and desorbing carbon dioxide in the air. In this carbon dioxide removal apparatus, the adsorption means (30) includes an adsorption material (40) having a functional group that selectively adsorbs and desorbs carbon dioxide.

  In the said 1st invention, the carbon dioxide density | concentration of indoor space is reduced by adsorb | sucking the carbon dioxide in indoor air, for example by the adsorption | suction means (30). On the other hand, the carbon dioxide desorbed from the adsorption means (30) is discharged into, for example, an outdoor space.

  Here, in the present invention, an adsorption material (40) having a functional group that selectively adsorbs and desorbs carbon dioxide is used as the adsorption means (30). Therefore, when carbon dioxide in the air flows through the surface of the adsorbing material (40), adsorption involving a chemical reaction between carbon dioxide and the functional group is performed on the surface of the adsorbing material (40). Therefore, carbon dioxide in the air can be selectively adsorbed by the adsorbing material (40).

  According to a second invention, in the carbon dioxide removing apparatus according to the first invention, the adsorbing material (40) is a material containing a resin having a functional group that selectively adsorbs and desorbs carbon dioxide. As the resin here, a chelate resin, an ion exchange resin, a chitosan resin and the like are particularly suitable.

  In the second invention, a material containing a resin such as a chelate resin, an ion exchange resin, or a chitosan resin is used as the material having a functional group that selectively absorbs and desorbs carbon dioxide.

  According to a third invention, in the carbon dioxide removing apparatus according to the second invention, the adsorbing material (40) is a composite material of chitosan and an ion exchange resin.

  In the third invention, a composite material of chitosan and ion exchange resin is used as a material having a functional group that selectively absorbs and desorbs carbon dioxide.

  According to a fourth invention, in the carbon dioxide removing apparatus of the first invention, the adsorbing material (40) is a material containing a complex having a functional group that selectively adsorbs and desorbs carbon dioxide. Here, the complex preferably has an inclusion space for selectively taking in carbon dioxide as a guest substance.

  In the fourth invention, a material containing a complex is used as a material having a functional group that selectively absorbs and desorbs carbon dioxide. Therefore, when carbon dioxide in the air flows through the surface of the adsorbing material (40), adsorption involving a chemical reaction between carbon dioxide and the functional group is performed on the surface of the adsorbing material (40). Further, when the complex has an inclusion space that selectively takes in carbon dioxide as a guest substance, carbon dioxide molecules are taken in and held in the inclusion space. Therefore, the adsorption ability with respect to the carbon dioxide in adsorption material (40) can be improved.

  According to a fifth invention, in the carbon dioxide removing device according to any one of the first to fourth inventions, the adsorbing material (40) is carried on a carrier made of a predetermined material. Here, the carrier is preferably a metal oxide such as alumina, silica, zeolite, and titanium oxide, or a carbon material such as activated carbon, graphite, or carbon fiber, and particularly harmful substances in the air (sulfur compounds, Nitrogen compounds, VOCs, lower fatty acids, etc.) having a predetermined adsorption capacity are preferred.

  In the fifth aspect of the invention, the adsorbing material (40) described in the first to fourth aspects of the invention is supported on the carrier, whereby the adsorbing material (40) can be held at a high density on the surface of the carrier. Therefore, the contact efficiency between the adsorbing material (40) and air can be increased while using a relatively small amount of the adsorbing material (40), and carbon dioxide can be effectively adsorbed by the adsorbing material (40).

  Further, by using a carrier having an ability to adsorb harmful substances, the adsorption means (30) can simultaneously perform the adsorption of carbon dioxide by the adsorbing material (40) and the adsorption of harmful substances by the carrier.

  According to a sixth aspect of the present invention, in the carbon dioxide removing device of the fifth aspect of the invention, the supply passage (11) through which the indoor air flowing in from the room flows and is supplied to the room, and the outdoor air flowing from the outdoor flow through the room. An exhaust passage (12) discharged into the exhaust passage, and a regeneration means (34) disposed in the exhaust passage (12) and desorbing carbon dioxide adsorbed by the adsorbent material (40). ) Is constituted by an adsorption rotor which can rotate while straddling the supply passage (11) and the exhaust passage (12), and is located in the supply passage (11) and adsorbs the carbon dioxide (32) And a desorption part (33) located in the exhaust passage (12) and desorbing carbon dioxide by the regeneration means (34).

  In the sixth aspect of the invention, the suction means (30) is a so-called rotary rotor. Therefore, when the adsorption rotor (30) rotates at a predetermined speed, the adsorbent material (40) at the predetermined portion alternately displaces the adsorption portion (32) and the desorption portion (33).

  Here, when the indoor air flowing through the supply passage (11) passes through the adsorption part (32) of the adsorption rotor (30), carbon dioxide in the indoor air is adsorbed by the adsorption material (40) of the adsorption part (32). The The air from which carbon dioxide has been removed is supplied to the indoor space. On the other hand, when the outdoor air flowing through the exhaust passage (12) passes through the desorption part (33) of the adsorption rotor (30), the regeneration means (34) is adsorbed by the adsorption material (40) of the desorption part (33). The released carbon dioxide is desorbed, and this carbon dioxide is given to the outdoor air. The air to which carbon dioxide is applied is discharged to the outdoor space.

  A seventh aspect of the present invention is the carbon dioxide removing apparatus according to the sixth aspect of the present invention, in the supply passage (11), on the upstream side of the adsorption portion (32) of the adsorption rotor (30), the moisture removal that removes moisture in the indoor air Means (50) are provided.

  In the seventh aspect of the invention, the room air flowing through the supply passage (11) is dehumidified by the moisture removing means (50) and then flows into the adsorption rotor (30). If it does in this way, it can avoid that a water | moisture content adheres to the adsorption material (40) in the adsorption | suction part (32) of an adsorption | suction rotor (30), and the carbon dioxide adsorption capacity in an adsorption material (40) falls.

  The eighth invention is the carbon dioxide removing apparatus according to the seventh invention, wherein the moisture removing means (50) comprises a moisture adsorbing means comprising a moisture adsorbing material (60) for adsorbing and desorbing moisture in the air, The passage (12) is provided with a moisture regenerating means (54) for desorbing moisture adsorbed on the moisture adsorbing material (60) of the moisture adsorbing means (50). The moisture adsorbing means (50) It is composed of a moisture adsorption rotor that can rotate while straddling the passage (11) and the exhaust passage (12), and is located upstream of the adsorption portion (32) of the adsorption rotor (30) in the supply passage (11). Moisture is adsorbed by the moisture regeneration means (54) located downstream of the adsorption rotor (30) desorption part (33) in the exhaust passage (12). And a water desorption part (53).

  In the eighth aspect of the invention, the moisture adsorption rotor (50), which is a moisture adsorption means including the moisture adsorption material (60), is provided as the moisture removal means for removing moisture in the room air. The moisture adsorption rotor (50) is a so-called rotary rotor, similar to the adsorption rotor (30). Here, the indoor air flowing through the supply passage (11) is dehumidified by the moisture adsorption material (60) in the moisture adsorption portion (52) of the moisture adsorption rotor (50) and then flows into the adsorption rotor (30). . If it does in this way, it can avoid that a water | moisture content adheres to the adsorption material (40) in the adsorption | suction part (32) of an adsorption | suction rotor (30), and the carbon dioxide adsorption capacity in an adsorption material (40) falls.

  On the other hand, outdoor air flows into the moisture adsorption rotor (50) after being given carbon dioxide in the desorption part (33) of the adsorption rotor (30). At this time, the moisture regeneration means (54) desorbs the moisture of the moisture adsorbing material (60) in the moisture desorbing section (53) of the moisture adsorption rotor (50), and this moisture is given to the outdoor air. The air containing moisture is discharged outside the room. Thus, since outdoor air flows through the moisture adsorption rotor (50) after passing through the adsorption rotor (30), the moisture desorbed by the moisture desorption portion (53) is adsorbed on the adsorption rotor (30). (40) will not stick.

  According to a ninth invention, in the carbon dioxide removing device according to the sixth invention, the adsorption rotor (30) is provided with a moisture adsorption material (60) for adsorbing and desorbing moisture in the air.

  In the ninth invention, unlike the eighth invention, the adsorption rotor (30) is provided with the moisture adsorption material (60). Therefore, the adsorption rotor (30) adsorbs moisture and carbon dioxide in the room air.

  According to a tenth aspect of the present invention, in the carbon dioxide removing device according to any one of the sixth to ninth aspects, the adsorption rotor (30) includes a base material (35) having a plurality of air holes (36) through which air flows. The adsorbing material (40) is held on the base material (35). Here, the adsorbing material (40) may be supported on the surface of the base material (35), or, for example, held in the air hole (36) by being held by the base material (35). It may be physically held.

  In the tenth aspect of the invention, when the indoor air passing through the adsorption rotor (30) passes through the vent hole (36) of the base material (35), the adsorbent material (40) held by the base material (35) Contact. And the carbon dioxide in indoor air is adsorb | sucked by the said adsorption material (40).

  An eleventh aspect of the invention is the carbon dioxide removing device according to any one of the sixth to ninth aspects, wherein the adsorption rotor (30) includes a base material (35) having a plurality of air holes (36) through which air flows. And the base material (35) is constituted by the adsorbing material (40).

  In the eleventh aspect of the invention, the base material (35) is formed by molding the adsorbent material (40) into a predetermined shape. The room air passing through the adsorption rotor (30) comes into contact with the adsorption material (40) constituting the substrate (35) when passing through the plurality of vent holes (36) of the substrate (35). And the carbon dioxide in indoor air is adsorbed by the adsorbent material (40).

  According to the first invention, the adsorption material (40) having a functional group that selectively adsorbs and desorbs carbon dioxide is used as the adsorption means (30). Therefore, carbon dioxide in the air can be selectively adsorbed by the adsorbing material (40). Therefore, the removal performance with respect to the carbon dioxide in indoor air in a carbon dioxide removal apparatus can be improved, and the carbon dioxide of indoor space can be reduced efficiently.

  According to the second aspect of the invention, by using a material containing a resin having a functional group that selectively adsorbs and desorbs carbon dioxide as the adsorbing means (30), the function and effect described in the first aspect can be obtained. Can do.

  According to the third invention, the function and effect described in the first invention can be obtained by using a composite material of chitosan and ion exchange resin as the adsorbing means (30).

  According to the fourth aspect of the invention, by using a material containing a complex having a functional group that selectively adsorbs and desorbs carbon dioxide as the adsorbing means (30), the operational effects described in the first aspect of the invention are obtained. Can do.

  Further, when the complex has an inclusion space that selectively takes in carbon dioxide as a guest substance, carbon dioxide molecules can be taken in and held in the inclusion space. Therefore, the removal performance with respect to carbon dioxide in the indoor air in the carbon dioxide removal device can be further improved.

  According to the fifth aspect of the present invention, the adsorption performance of carbon dioxide in the adsorption material (40) can be improved by supporting the adsorption material (40) on the surface of the carrier.

  Further, by using a metal oxide such as alumina or silica or a carbon material such as activated carbon as the carrier, harmful substances in the air can be adsorbed on the carrier. Therefore, this carbon dioxide removal device can reduce carbon dioxide in the indoor space, and at the same time remove harmful substances in the indoor space and increase the cleanliness of the indoor space.

  According to the sixth aspect, the rotary suction rotor (30) is used as the suction means. Therefore, carbon dioxide in the indoor space can be continuously processed while preventing adsorption breakthrough of the adsorbent material (40).

  Moreover, in this carbon dioxide removal apparatus, after removing the carbon dioxide in indoor air with an adsorption | suction rotor (30), this air is again supplied to indoor space. For this reason, the carbon dioxide removing device does not ventilate the indoor space. Therefore, it is possible to prevent carbon dioxide in the outdoor air from entering the indoor space, and as a result, an increase in the load of carbon dioxide processed by the carbon dioxide removing device. Therefore, the carbon dioxide concentration in the indoor space can be effectively reduced.

  According to the seventh aspect, after the room air is dehumidified by the moisture removing means (50), the room air is passed through the adsorption rotor (30). Therefore, in the adsorbing material (40), it is possible to avoid that the effective surface contributing to the adsorption of carbon dioxide is covered with moisture in the air and the adsorbing performance of the adsorbing material (40) is impaired.

  In particular, when a complex is used as the adsorbing material (40) as in the fourth invention, since such a complex has deliquescence, the molecular structure constituting the complex may be destroyed in an atmosphere with moisture. However, in the present invention, since the room air is dehumidified by the moisture adsorption rotor (50) before the room air reaches the adsorption rotor (30), the molecular structure of the complex (40) is reduced for the reason described above. It can avoid collapsing. Accordingly, it is possible to suppress a decrease in the adsorption capacity of the adsorbing material (40) containing the complex and to extend the life of the adsorbing material (40).

  According to the eighth aspect of the invention, the moisture adsorption rotor (50) which is a moisture adsorption unit is used as the moisture removal unit. Therefore, it is possible to continuously dehumidify the indoor air while avoiding a decrease in the moisture adsorption capacity of the moisture adsorbing material (60). Therefore, it is possible to reliably suppress the moisture from adhering to the adsorbing material (40) in the adsorbing portion (32) of the adsorbing rotor (30), and it is possible to more reliably obtain the effects described in the seventh invention. .

  According to the ninth aspect of the present invention, the adsorption rotor (30) is provided with both the adsorbing material (40) and the moisture adsorbing material (60), so that the carbon dioxide removing device can be designed in a compact manner while in the indoor air. Water and carbon dioxide can be removed. Here, the moisture adsorbing material (60) is arranged near the upstream side of the indoor air in the adsorption rotor (30), while the adsorbing material (40) is arranged near the downstream side of the indoor air in the adsorption rotor (30). It is also possible to obtain the effects described above in the eighth invention.

  According to the tenth aspect of the present invention, the adsorption rotor (30) is provided with the base material (35) having a plurality of vent holes (36). The adsorbing material (40) is held on the base material (35). Therefore, it is possible to reduce the ventilation pressure loss that occurs when the room air passes through the adsorption rotor (30). In addition, the contact efficiency between the adsorbing material (40) and room air can be increased, and the carbon dioxide removal performance of the adsorbing rotor (30) can be improved.

  According to the eleventh aspect of the invention, the base material (35) having a plurality of vent holes (36) is provided in the suction rotor (30). And the base material (35) is comprised with adsorption material (40). Therefore, it is possible to reduce the ventilation pressure loss that occurs when the room air passes through the adsorption rotor (30). Further, since the adsorbing material (40) can be arranged at a high density in the adsorption rotor (30), the carbon dioxide removal performance of the adsorption rotor (30) can be improved.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

Embodiment 1 of the Invention
The carbon dioxide removal device (10) according to Embodiment 1 removes carbon dioxide in room air while circulating room air.

  As shown in FIG. 1, the carbon dioxide removing device (10) includes a supply passage (11) provided on the indoor side and an exhaust passage (12) provided on the outdoor side.

  In the supply passage (11), room air flowing in from the room flows and is supplied to the room. In the supply passage (11), an indoor suction port (13) that is an inflow port of indoor air is formed at one opening end, and an air supply port (14) that is an outflow port of room air is formed at the other opening end. Is formed. An air supply fan (17) is disposed near the air supply port (14) in the supply passage (11).

  In the exhaust passage (12), outdoor air flowing in from the outside flows and is discharged to the outside. The exhaust passage (12) has an outdoor suction port (15) as an outdoor air inlet at one opening end, and an exhaust port (16) as an outdoor air outlet at the other opening end. Has been. Further, an exhaust fan (18) is disposed near the exhaust port (16) side in the exhaust passage (12).

  The carbon dioxide removal device (10) includes an adsorption rotor (30) as adsorption means for adsorbing and desorbing carbon dioxide in room air. The adsorption rotor (30) is formed in a disc shape or a cylindrical shape, and the rotation shaft (31) passes through the axis. The adsorption rotor (30) is disposed across both the supply passage (11) and the exhaust passage (12) so that the axial direction thereof is parallel to the air flow direction. With the above configuration, the adsorption rotor (30) can rotate around the rotation shaft (31) while straddling the supply passage (11) and the exhaust passage (12). In the adsorption rotor (30), the part located in the supply passage (11) becomes the adsorption part (32) that adsorbs carbon dioxide in the air, while the part located in the exhaust passage (12) is carbon dioxide. Becomes the detachment part (33) from which detaches.

  Further, the adsorption rotor (30) has a honeycomb or corrugated substrate (35) as shown in FIG. The base material (35) is formed with a plurality of air holes (36) through which air flows. The vent hole (36) is formed in, for example, a triangular shape, and the openings at both ends thereof face the supply passage (11) or the exhaust passage (12). As shown in FIG. 3, an adsorbing material (40) that adsorbs and desorbs carbon dioxide in the air is carried on the surface of the base material (35). In addition, as a base material (35), materials, such as a ceramic paper, glass fiber, the organic compound which has cellulose as a main component, a metal, resin, are used suitably.

  As shown in FIG. 1, the exhaust passage (12) is provided with a heating means (34) as a regeneration means for desorbing carbon dioxide adsorbed on the adsorbing material (40) of the adsorption rotor (30). ing. The heating means (34) is disposed in the vicinity of the desorption part (33) of the adsorption rotor (30). The heating means (34) heats the adsorbing material (40) of the desorption part (33) to a predetermined temperature (for example, 150 ° C.), and desorbs carbon dioxide from the desorption part (33).

  As a feature of the present invention, the adsorbing material (40) is made of a material containing a resin having a functional group that selectively absorbs and desorbs carbon dioxide. As the functional group, a sulfone group, a carboxyl group, a hydroxyl group, an amino group and the like are preferable. Moreover, as said resin, especially a chelate resin, an ion exchange resin, chitosan resin, etc. are suitable.

  Examples of the base material of the chelate resin include styrene (polystyrene, polystyrene / divinylbenzene copolymer), acrylic resin, polyphenol resin, and the like.

  The ion exchange resin is an organic synthetic resin in which ion exchange groups are chemically bonded to a crosslinked three-dimensional polymer substrate. Examples of the polymer substrate include copolymers of styrene and divinylbenzene, acrylic polymers (polyacrylic acid, polymethacrylic acid), polyacrylamide, copolymers of acrylic and divinylbenzene, polystyrene, and the like. The ion exchange groups include sulfone groups and carboxyl groups in the case of cation exchange resins, quaternary ammonium bases, quaternary alkynolamine groups, primary to tertiary amino groups, and free bases in the case of anion exchange resins. Etc.

  The chitosan resin is a polymer material having a unit structure as shown in FIG.

  In the present embodiment, the adsorbing material (40) is composed of a composite material of chitosan and the ion exchange resin shown in FIG. The composite material of chitosan and ion exchange resin is synthesized, for example, by the following method.

  Flakes of chitosan 0.5-2.0 g and acetic acid 2.5-5.0 g are dissolved in water, 100 g of chitosan aqueous solution is prepared, and stored in a thermostatic bath at 50 ° C. for 72 hours. After 15 g of ion exchange resin is put in a dried glass suction bottle and evacuated for 12 hours, an aqueous chitosan solution is poured over the ion exchange resin and allowed to stand for 12 hours. The sample obtained as described above is immersed in a 1N aqueous sodium hydroxide solution, washed with water, filtered, and dried at 50 ° C., so that a composite material of chitosan and ion exchange resin is synthesized.

  In the composite material synthesis method described above, a composite material of chitosan and a carbon material can be synthesized by using a carbon material such as activated carbon instead of the ion exchange resin. 40).

-Driving action-
Next, the operation of the carbon dioxide removal device (10) according to Embodiment 1 will be described with reference to FIG.

  During operation of the carbon dioxide removal device (10), the air supply fan (17) and the exhaust fan (18) are operated, and the adsorption rotor (30) rotates at a predetermined speed. The indoor air flows into the supply passage (11) from the indoor suction port (13), while the outdoor air flows into the exhaust passage (12) from the outdoor suction port (15).

  The room air flowing through the supply passage (11) passes through the adsorption part (32) of the adsorption rotor (30). At this time, carbon dioxide in the room air is adsorbed by the adsorbing material (40) in the adsorbing section (32). The room air from which carbon dioxide has been removed as described above flows through the supply passage (11) and is then supplied to the indoor space from the air supply port (14).

  The outdoor air flowing through the exhaust passage (12) passes through the desorption part (33) of the adsorption rotor (30). Here, the heating means (34) warms the desorption part (33) to a predetermined temperature. For this reason, when the adsorbing material (40) having adsorbed carbon dioxide in the adsorption section (32) is displaced to the desorption section (33) by the rotation of the adsorption rotor (30), the carbon dioxide is desorbed from the desorption section (33). The carbon dioxide is given to the outdoor air. As described above, outdoor air containing carbon dioxide desorbed from the desorbing section (33) flows through the exhaust passage (12) and is then discharged from the exhaust port (16) to the outdoor space.

-Performance test of adsorbent materials-
Next, an adsorption performance test of carbon dioxide in a composite material of chitosan and ion exchange resin (hereinafter referred to as sample 1) used as the adsorbing material (40) of the present embodiment will be described with reference to FIGS. To do.

As shown in FIG. 5, in this test, a petri dish (71) in which a predetermined amount of the sample 1 is sealed is placed in an acrylic sealed container (70) and adjusted to a predetermined concentration from the inlet (72). Carbon dioxide was injected. Thereafter, the carbon dioxide concentration in the sealed container (70) was measured using the CO 2 sensor (73) from the time when the petri dish (71) was removed, and the change in the carbon dioxide concentration over time was observed. In addition, as a comparative sample of Sample 1, zeolite (Sample 2), which is an inorganic adsorption material, was used, and a test was performed under the same conditions as Sample 1.

  FIG. 6 is a graph showing the test results. The solid line indicated by a in FIG. 6 indicates the change over time in the carbon dioxide concentration in the test using Sample 1 (composite material of chitosan and ion exchange resin), and the solid line indicated by b in FIG. The change with time of the carbon dioxide concentration in the test using 2 (zeolite) is shown.

  As a result of the test, when Sample 1 was used as the adsorbing material, the carbon dioxide concentration in the sealed container (70) decreased rapidly. On the other hand, when Sample 2 was used as the adsorbing material, the carbon dioxide concentration in the sealed container (70) decreased to some extent, but the amount of decrease in carbon dioxide concentration was small compared to Sample 1. From the above results, it was confirmed that the adsorbing material (40) of the present embodiment was superior in adsorption performance for carbon dioxide as compared with the inorganic adsorbing material.

-Effect of Embodiment 1-
According to the first embodiment, the following effects are exhibited.

  In the first embodiment, a composite material of chitosan and ion exchange resin is used as the adsorbing material (40) having a functional group. As shown in FIG. 6, this composite material is superior in carbon dioxide adsorption capacity, for example, as compared to zeolite, which is an inorganic material. Therefore, in this carbon dioxide removal apparatus, the carbon dioxide in indoor air can be reduced effectively.

  In the first embodiment, the rotary suction rotor (30) is used as the suction means. Therefore, carbon dioxide in the indoor space can be continuously processed while suppressing adsorption breakthrough of the adsorbent material (40).

  Moreover, in this carbon dioxide removal apparatus, after removing the carbon dioxide in indoor air with an adsorption | suction rotor (30), this air is again supplied to indoor space. For this reason, in this carbon dioxide removal apparatus, indoor space is not ventilated. Therefore, it is possible to prevent carbon dioxide in the outdoor air from entering the indoor space, and as a result, an increase in the load of carbon dioxide processed by the carbon dioxide removing device. Therefore, the carbon dioxide concentration in the indoor space can be effectively reduced.

  Furthermore, in the said Embodiment 1, the base material (35) which has a some ventilation hole (36) is provided in the adsorption | suction rotor (30). The adsorbing material (40) is held on the surface of the substrate (35). Therefore, it is possible to reduce the ventilation pressure loss that occurs when the room air passes through the adsorption rotor (30). In addition, the contact efficiency between the adsorbing material (40) and room air can be increased, and the carbon dioxide removal performance of the adsorbing rotor (30) can be improved.

<< Embodiment 2 of the Invention >>
Next, a carbon dioxide removal device (10) according to Embodiment 2 will be described with reference to FIG. The carbon dioxide removal device (10) of Embodiment 2 is obtained by providing the carbon dioxide removal device of Embodiment 1 with water adsorption means (water removal means) (50) and water regeneration means (54). The configuration is the same as in the first embodiment. Hereinafter, differences from the first embodiment will be described.

  The moisture adsorption means (50) adsorbs and desorbs moisture in the room air. The moisture adsorption means (50) is constituted by a moisture adsorption rotor (50) provided with a moisture adsorption material (60). Similarly to the adsorption rotor (30), the moisture adsorption rotor (50) is formed in a disc shape or a cylindrical shape, and the rotation shaft (51) passes through the axis. The moisture adsorption rotor (50) is disposed across both the supply passage (11) and the exhaust passage (12) so that the axial direction thereof is parallel to the air flow direction.

  With the above configuration, the moisture adsorption rotor (50) can rotate around the rotation shaft (51) while straddling the supply passage (11) and the exhaust passage (12). In the moisture adsorption rotor (50), the portion located in the supply passage (11) becomes the moisture adsorption portion (52) that adsorbs moisture in the air, while the portion located in the exhaust passage (12) is moisture. This is a water detachment part (53) from which detaches. The moisture adsorbing part (52) is located upstream of the adsorbing part (32) of the adsorption rotor (30) in the supply passage (11). On the other hand, the water desorption part (53) is located downstream of the desorption part (33) of the adsorption rotor (30) in the exhaust passage (12).

  Similarly to the adsorption rotor (30), the moisture adsorption rotor (50) includes a honeycomb or corrugated substrate, and a moisture adsorption material (60) is supported on the surface of the substrate. This moisture adsorbing material (60) is a metal oxide composed of at least one of alumina, silica, alumina / silica, zeolite, and titanium oxide, or a carbon material such as activated carbon, graphite, or carbon fiber, or a functional group. The resin which has is used suitably.

  The exhaust passage (12) is provided with a moisture heating means (54) as a moisture regeneration means for desorbing moisture adsorbed on the moisture adsorption material (60) of the moisture adsorption rotor (50). The moisture heating means (54) is disposed in the vicinity of the moisture desorption portion (53) of the moisture adsorption rotor (50). The moisture heating means (54) warms the moisture adsorbing material (60) of the moisture desorption section (53) to a predetermined temperature and desorbs moisture from the moisture desorption section (53).

-Driving action-
Next, the operation of the carbon dioxide removal device (10) according to the second embodiment will be described with reference to FIG.

  During operation of the carbon dioxide removal device (10), the air supply fan (17) and the exhaust fan (18) are operated, and the adsorption rotor (30) and the moisture adsorption rotor (50) rotate at a predetermined speed. The indoor air flows into the supply passage (11) from the indoor suction port (13), while the outdoor air flows into the exhaust passage (12) from the outdoor suction port (15).

  The room air flowing through the supply passage (11) passes through the moisture adsorption part (52) of the moisture adsorption rotor (50). At this time, in the moisture adsorbing part (52), moisture in the room air is adsorbed by the moisture adsorbing material (60), and the room air is dehumidified.

  Thereafter, the room air passes through the adsorption portion (32) of the adsorption rotor (30). At this time, carbon dioxide in the room air is adsorbed by the adsorbing material (40) in the adsorbing section (32). The room air from which carbon dioxide has been removed as described above flows through the supply passage (11) and is then supplied to the indoor space from the air supply port (14).

  The outdoor air flowing through the exhaust passage (12) passes through the desorption part (33) of the adsorption rotor (30). Here, the heating means (34) warms the desorption part (33) to a predetermined temperature. For this reason, when the adsorbing material (40) on which carbon dioxide has been adsorbed by the adsorption unit (32) is displaced to the desorption unit (33) by the rotation of the adsorption rotor (30), the carbon dioxide is desorbed from the desorption unit (33). The carbon dioxide is given to the outdoor air.

  Thereafter, the outdoor air passes through the moisture desorption portion (53) of the moisture adsorption rotor (50). Here, the water | moisture-content heating means (54) is heating the water | moisture-content desorption part (53) to predetermined temperature. For this reason, if the moisture adsorption material (60) in which moisture is adsorbed by the moisture adsorption unit (52) is displaced to the moisture desorption unit (53) by the rotation of the moisture adsorption rotor (50), the moisture desorption unit (53) Moisture is desorbed and this moisture is given to the outdoor air. As described above, the outdoor air to which carbon dioxide and moisture are added flows through the exhaust passage (12) and then is discharged from the exhaust port (16) to the outdoor space.

-Effect of Embodiment 2-
According to the second embodiment, the following effects are exhibited.

  In the said Embodiment 2, the adsorption material (40) which has a functional group is used similarly to Embodiment 1. FIG. Therefore, carbon dioxide in room air can be selectively adsorbed. Therefore, in this carbon dioxide removal device, carbon dioxide in the indoor air can be effectively reduced.

  In the second embodiment, the moisture adsorption rotor (50) is used as the moisture adsorption means. And it suppresses that a water | moisture content adheres to the adsorption material (40) in the adsorption | suction part (32) of an adsorption | suction rotor (30). Therefore, it can avoid reliably that the adsorption | suction performance of adsorption material (40) will be impaired.

<< Embodiment 3 of the Invention >>
Next, a carbon dioxide removal device (10) according to Embodiment 3 will be described with reference to FIG. The carbon dioxide removing device (10) of the third embodiment is such that the moisture adsorbing material (60) described above in the second embodiment is carried on the adsorption rotor (30) of the first embodiment. Therefore, in the adsorption rotor (30), the adsorption section (32) that adsorbs carbon dioxide and the moisture adsorption section (52) that adsorbs moisture are integrally formed on the supply passage (11) side. On the other hand, in the adsorption rotor (30), a desorption part (33) for desorbing carbon dioxide and a moisture desorption part (53) for desorbing moisture are integrally formed on the exhaust passage (12) side. Has been. In addition, the regeneration means (34) disposed in the exhaust passage (12) warms both the desorption part (33) and the moisture desorption part (53) to a predetermined temperature, and the desorption part (33) Carbon dioxide is desorbed from the water desorbing part (53) at the same time.

  According to the third embodiment, the adsorption rotor (30) includes both the adsorbing material (40) and the moisture adsorbing material (60). Moisture and carbon dioxide can be removed.

<< Other Embodiments >>
The present invention may be configured as follows with respect to the above embodiment.

  In the above embodiment, as shown in FIG. 3, the adsorbing material (40) is carried on the surface of the base material (35) of the adsorption rotor (30). However, for example, as shown in FIG. 9, the adsorbing material (40) is filled in the vent holes (36) of the base material (35), and the adsorbing material (40) is held by the base material (35), The adsorbent material (40) may be held on the substrate (35). In this case, since the adsorbing material (40) can be arranged with high density in the vent hole (36) through which the room air flows, the contact efficiency between the adsorbing material (40) and the room air can be improved. Therefore, the carbon dioxide removal efficiency by the carbon dioxide removal device (40) can be effectively increased.

  Moreover, the base material (35) as shown in FIG. 2 can also be comprised by the adsorption material (40) shape | molded by the predetermined shape. In this case, the base material (35) itself can have carbon dioxide adsorption ability, and the adsorption material (40) can be arranged at high density in the adsorption rotor (30). Therefore, also in this case, the carbon dioxide removal efficiency by the carbon dioxide removal device (10) can be effectively increased.

Further, the adsorbing material (40) of the above embodiment is made of a resin having a functional group that selectively absorbs and desorbs carbon dioxide. However, as another adsorbing material (40), a complex having a functional group that selectively absorbs and desorbs carbon dioxide may be used. Examples of the functional group include a sulfone group, a carboxyl group, a hydroxyl group, and an amino group. Further, examples of the complex, for example, shown in Figure 10 [Cu 2 (terephthalate) 2 N (C 2 H 4) 3 N] , such as n are used.

  This complex (40) is a complex having an inclusion space that selectively takes in carbon dioxide as a guest substance, and has a substantially square box-like structure. FIG. 10 shows only one substantially square box-like structure, but in actuality, the box-like structure spreads side by side in a plane, or the planes are stacked to form a three-dimensional structure. It has a structure that can be called a so-called porous coordination polymer. In addition, since such a complex has deliquescence, this structure is destroyed in an atmosphere with moisture. However, as described above in Embodiment 2, indoor air is used as the adsorbing material (complex) (40). By dehumidifying the indoor air with the moisture adsorbing material (60) before reaching, the structure of the complex (40) can be prevented from being broken.

  Further, any of the adsorbing materials (40) described in the above embodiment may be carried on a predetermined carrier and used as the adsorbing means (30). Examples of the carrier include a metal oxide composed of at least one of alumina, silica, alumina / silica, zeolite, and titanium oxide, or a carbon material such as activated carbon, graphite, or carbon fiber, or a resin having a functional group. Preferably used. By supporting the adsorbing material (40) on the surface of such a carrier, a relatively small amount of the adsorbing material (40) can be held at a high density on the surface of the carrier, and the adsorbing material (40) on the surface of the carrier and the room air Contact efficiency can be increased.

  Furthermore, the effect of cleaning the indoor space by the carbon dioxide removing device (10) can be enhanced by utilizing the effect of adsorbing harmful substances of the carrier.

  In the above-described embodiment, the heating means is used as the regeneration means (34) for the adsorbing material (40) or the moisture regeneration means (54) for the moisture adsorbing material (60). However, as the regeneration means (34) (moisture regeneration means (54), an electric field is applied to the desorption part (33) (water desorption part (53)) by, for example, a pair of electrodes, and the desorption part (33 , 53) may be used.

  As described above, the present invention is useful for a carbon dioxide removing apparatus that includes an adsorption means for adsorbing and desorbing carbon dioxide.

1 is a schematic configuration diagram of a carbon dioxide removal device according to Embodiment 1. FIG. It is a principal part enlarged view of an adsorption | suction rotor. It is a principal part enlarged view of the board | substrate of an adsorption | suction rotor. It is a structural diagram which shows the single structure of chitosan. It is a schematic block diagram of an adsorption | suction performance test apparatus. It is a graph which shows the result of an adsorption performance test. It is a schematic block diagram of the carbon dioxide removal apparatus which concerns on Embodiment 2. FIG. It is a schematic block diagram of the carbon dioxide removal apparatus which concerns on Embodiment 3. It is a principal part enlarged view of the base material in other embodiment. It is an example of the schematic structural drawing of a complex.

Explanation of symbols

(10) Carbon dioxide removal device
(11) Supply passage
(12) Exhaust passage
(30) Adsorption rotor (adsorption means)
(32) Suction part
(33) Detachment part
(34) Reproduction means
(40) Adsorption material
(50) Moisture adsorption rotor (moisture removal means, moisture adsorption means)
(52) Moisture adsorption part
(53) Moisture release part
(54) Moisture regeneration means
(60) Moisture adsorption material

Claims (11)

  1. A carbon dioxide removing device comprising an adsorption means (30) for adsorbing and desorbing carbon dioxide in the air,
    The adsorbing means (30) is a carbon dioxide removing device comprising an adsorbing material (40) having a functional group that selectively adsorbs and desorbs carbon dioxide.
  2. The carbon dioxide removal apparatus according to claim 1, wherein
    The carbon dioxide removing device, wherein the adsorbing material (40) is a material containing a resin having a functional group that selectively adsorbs and desorbs carbon dioxide.
  3. The carbon dioxide removal apparatus according to claim 2,
    The adsorbent material (40) is a carbon dioxide removing device which is a composite material of chitosan and an ion exchange resin.
  4. The carbon dioxide removal apparatus according to claim 1, wherein
    The said adsorption material (40) is a carbon dioxide removal apparatus which is a material containing the complex which has a functional group which selectively adsorbs / desorbs carbon dioxide.
  5. In the carbon dioxide removal apparatus according to any one of claims 1 to 4,
    The adsorbent material (40) is a carbon dioxide removing device supported on a carrier made of a predetermined material.
  6. The carbon dioxide removing apparatus according to claim 5, wherein
    A supply passage (11) through which indoor air flowing from the room flows and is supplied to the room, an exhaust passage (12) through which outdoor air flowing from the outside flows and is discharged to the outside, and the exhaust passage (12) And a regenerating means (34) for desorbing carbon dioxide adsorbed on the adsorbing material (40),
    The adsorption means (30) is composed of an adsorption rotor that can rotate while straddling the supply passage (11) and the exhaust passage (12), and is located in the supply passage (11) and adsorbs carbon dioxide. A carbon dioxide removing apparatus comprising: a section (32); and a desorption section (33) located in the exhaust passage (12) and desorbing carbon dioxide by the regeneration means (34).
  7. The carbon dioxide removing apparatus according to claim 6, wherein
    A carbon dioxide removing device provided with moisture removing means (50) for removing moisture in room air upstream of the adsorption portion (32) of the adsorption rotor (30) in the supply passage (11).
  8. The carbon dioxide removing apparatus according to claim 7, wherein
    The moisture removing means (50) is constituted by a moisture adsorbing means provided with a moisture adsorbing material (60) for adsorbing and desorbing moisture in the air,
    The exhaust passage (12) is provided with a moisture regeneration means (54) for desorbing moisture adsorbed on the moisture adsorption material (60) of the moisture adsorption means (50).
    The moisture adsorption means (50) is composed of a moisture adsorption rotor that can rotate while straddling the supply passage (11) and the exhaust passage (12), and the adsorption portion (of the adsorption rotor (30) in the supply passage (11) ( 32) located on the upstream side of the moisture adsorption part (52) for adsorbing moisture, and on the exhaust passage (12) on the downstream side of the desorption part (33) of the adsorption rotor (30). A carbon dioxide removing device comprising a water desorption part (53) from which water is desorbed by means (54).
  9. The carbon dioxide removing apparatus according to claim 6, wherein
    A carbon dioxide removing device in which the adsorption rotor (30) is provided with a moisture adsorption material (60) that adsorbs and desorbs moisture in the air.
  10. The carbon dioxide removing apparatus according to any one of claims 6 to 9,
    The adsorption rotor (30) includes a base material (35) having a plurality of air holes (36) through which air flows,
    The carbon dioxide removal apparatus by which the adsorption material (40) is hold | maintained at the said base material (35).
  11. The carbon dioxide removing apparatus according to any one of claims 6 to 9,
    The adsorption rotor (30) includes a base material (35) having a plurality of air holes (36) through which air flows,
    The base material (35) is a carbon dioxide removing device constituted by an adsorbing material (40).
JP2004244064A 2004-08-24 2004-08-24 Carbon dioxide remover Pending JP2006061758A (en)

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JP2009019788A (en) * 2007-07-10 2009-01-29 Seibu Giken Co Ltd Desiccant air conditioner
JP2009052753A (en) * 2007-08-23 2009-03-12 Seibu Giken Co Ltd Ventilation fan
JP2012520766A (en) * 2009-03-17 2012-09-10 グラシエラ・チチルニスキー Structure and technology for carbon dioxide capture and regeneration
JP2013202595A (en) * 2012-03-29 2013-10-07 Takasago Thermal Eng Co Ltd Adsorbing device
US8894747B2 (en) 2007-05-21 2014-11-25 Peter Eisenberger System and method for removing carbon dioxide from an atmosphere and global thermostat using the same
US9227153B2 (en) 2007-05-21 2016-01-05 Peter Eisenberger Carbon dioxide capture/regeneration method using monolith
JP2016002519A (en) * 2014-06-17 2016-01-12 株式会社西部技研 Adsorption type dehumidifier capable of controlling carbon dioxide concentration
US9427726B2 (en) 2011-10-13 2016-08-30 Georgia Tech Research Corporation Vapor phase methods of forming supported highly branched polyamines
US9433896B2 (en) 2010-04-30 2016-09-06 Peter Eisenberger System and method for carbon dioxide capture and sequestration
US9908080B2 (en) 2007-05-21 2018-03-06 Peter Eisenberger System and method for removing carbon dioxide from an atmosphere and global thermostat using the same
US9925488B2 (en) 2010-04-30 2018-03-27 Peter Eisenberger Rotating multi-monolith bed movement system for removing CO2 from the atmosphere
US9975087B2 (en) 2010-04-30 2018-05-22 Peter Eisenberger System and method for carbon dioxide capture and sequestration from relatively high concentration CO2 mixtures
JP6383467B1 (en) * 2017-07-19 2018-08-29 株式会社西部技研 Dehumidifying air conditioner
KR20190077217A (en) 2017-12-25 2019-07-03 가부시키가이샤 세이부 기켄 Ventilating and air conditioning device

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Cited By (19)

* Cited by examiner, † Cited by third party
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US8894747B2 (en) 2007-05-21 2014-11-25 Peter Eisenberger System and method for removing carbon dioxide from an atmosphere and global thermostat using the same
US9908080B2 (en) 2007-05-21 2018-03-06 Peter Eisenberger System and method for removing carbon dioxide from an atmosphere and global thermostat using the same
US9555365B2 (en) 2007-05-21 2017-01-31 Peter Eisenberger System and method for removing carbon dioxide from an atmosphere and global thermostat using the same
US9227153B2 (en) 2007-05-21 2016-01-05 Peter Eisenberger Carbon dioxide capture/regeneration method using monolith
JP2009019788A (en) * 2007-07-10 2009-01-29 Seibu Giken Co Ltd Desiccant air conditioner
JP2009052753A (en) * 2007-08-23 2009-03-12 Seibu Giken Co Ltd Ventilation fan
JP2012520766A (en) * 2009-03-17 2012-09-10 グラシエラ・チチルニスキー Structure and technology for carbon dioxide capture and regeneration
US9925488B2 (en) 2010-04-30 2018-03-27 Peter Eisenberger Rotating multi-monolith bed movement system for removing CO2 from the atmosphere
US9975087B2 (en) 2010-04-30 2018-05-22 Peter Eisenberger System and method for carbon dioxide capture and sequestration from relatively high concentration CO2 mixtures
US9433896B2 (en) 2010-04-30 2016-09-06 Peter Eisenberger System and method for carbon dioxide capture and sequestration
US9630143B2 (en) 2010-04-30 2017-04-25 Peter Eisenberger System and method for carbon dioxide capture and sequestration utilizing an improved substrate structure
US9878286B2 (en) 2010-04-30 2018-01-30 Peter Eisenberger System and method for carbon dioxide capture and sequestration
US10413866B2 (en) 2010-04-30 2019-09-17 Peter Eisenberger System and method for carbon dioxide capture and sequestration
US10512880B2 (en) 2010-04-30 2019-12-24 Peter Eisenberger Rotating multi-monolith bed movement system for removing CO2 from the atmosphere
US9427726B2 (en) 2011-10-13 2016-08-30 Georgia Tech Research Corporation Vapor phase methods of forming supported highly branched polyamines
JP2013202595A (en) * 2012-03-29 2013-10-07 Takasago Thermal Eng Co Ltd Adsorbing device
JP2016002519A (en) * 2014-06-17 2016-01-12 株式会社西部技研 Adsorption type dehumidifier capable of controlling carbon dioxide concentration
JP6383467B1 (en) * 2017-07-19 2018-08-29 株式会社西部技研 Dehumidifying air conditioner
KR20190077217A (en) 2017-12-25 2019-07-03 가부시키가이샤 세이부 기켄 Ventilating and air conditioning device

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