CN102764578A - CO2 absorption separation device and CO2 absorption separation method by hot potash process - Google Patents

CO2 absorption separation device and CO2 absorption separation method by hot potash process Download PDF

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Publication number
CN102764578A
CN102764578A CN2012102466079A CN201210246607A CN102764578A CN 102764578 A CN102764578 A CN 102764578A CN 2012102466079 A CN2012102466079 A CN 2012102466079A CN 201210246607 A CN201210246607 A CN 201210246607A CN 102764578 A CN102764578 A CN 102764578A
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absorption
separation
air accumulator
metavanadate
bottle
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李十中
陈郴
蒲薇华
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Tsinghua University
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Tsinghua University
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    • 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
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
    • 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

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Abstract

The invention discloses a CO2 absorption separation device and a CO2 absorption separation method by a hot potash process, belonging to the technical field of marsh gas separation and purification. In the invention, the absorption liquid is prepared by using carbonate as an absorbent, metaborate as an activating agent and metavanadate as a corrosion inhibitor, and the CO2 absorption separation device is used for carrying out absorption separation on the CO2. The carbonate absorbent selected in the invention has the advantages of wide raw material sources and low cost, and is environment-friendly; and the addition of the metaborate enhances the absorption rate so as to obviously increase the CO2 absorption capacity, lowers the corrosion degree of equipment, and increases the absorption rate. The invention has an important promotion action on energy and chemical engineering, particularly development of marsh gas purification and separation technology.

Description

A kind of CO 2Absorbing separator and hot potash method absorption and separation CO thereof 2Method
Technical field
The invention belongs to biogas isolation of purified technical field, be specifically related to a kind of CO 2Absorbing separator and hot potash method absorption and separation CO thereof 2Method.
Background technology
The energy is the grand strategy resource of each national sustainable development in the world, is the power producer of social productive forces.Along with oil, environmental protection is sought in the consumption day by day of non-renewable energy resources such as coal; It is particularly important that reproducible new forms of energy become, and biogas is as a kind of novel renewable and clean energy resource, and it is abundant, cheap to have raw material sources; Combustion heat value is high, low emission, characteristics such as antiknock security performance height.
The composition more complicated of biogas, its topmost composition methane (CH 4) content is about 60%-70%, carbon dioxide (CO usually 2) 30%-40%, also have a spot of hydrogen sulfide (H in addition 2S) gas etc.In addition, the calorific value of pure methane is 35.9MJ/m3, the calorific value 20-25MJ/m3 of biogas, because the existence of foreign gases such as carbon dioxide, therefore the obviously reduction of the fuel value of biogas, separates and removes the carbon dioxide in the biogas, and it is particularly important to improve fuel value.Simultaneously, saving is utilized reproducible clean biometric mass-energy source, reduce carbon emission, it is significant to improve the ecological environment.
At present, the main method that separating carbon dioxide is gone up in industry both at home and abroad has solvent absorption, and absorbent commonly used has potash, alkanolamine solution etc.Solution of potassium carbonate absorbs and is referred to as traditional hot potash method, and promptly the solution of potassium carbonate with certain content carries out absorption and separation as absorbent in the absorption tower.Because traditional absorption equipment is heavy, simple solution of potassium carbonate is slower as the absorbent infiltration rate, and equipment corrosion is serious; Alkanolamine solution is as absorbent, and cost is higher, also can cause damage to equipment simultaneously.At present, people choose suitable activator usually and corrosion inhibiter joins in the solution of potassium carbonate, reduce equipment corrosion, and increase uptake, improve absorption efficiency.
In solution of potassium carbonate, add activator (being catalyst) and corrosion inhibiter and can improve absorption rate, and reduce corrosion on Equipment.Italian patent 545908 has been reported arsenic trioxide or amion acetic acid has been joined in the solution of potassium carbonate as catalyst; But because arsenic trioxide solution has very high toxicity and carcinogenesis; Received very big restriction in application facet; Simultaneously, slow as the amion acetic acid absorption rate of catalyst, the solution instability makes this technology be difficult to practical application.U.S. Pat 2886045 has adopted in solution of potassium carbonate and to have added diethanol amine and make activator, but the method solution absorption rate is low, absorb and the regeneration energy consumption all higher.Chinese invention patent CN1006041B has reported a kind of new technology of hot potash method absorbing carbon dioxide of improvement; With hydroxyethyl piperazine and boric acid as activator; Carry out the absorption of carbon dioxide with potash, aspect energy consumption, decrease, but assimilation effect is still not fully up to expectations.In a word; In present existing hot potash method patent; Though absorbing CO2, improving one's methods of being adopted have some improvement; But resultant effect is also unsatisfactory, and existence such as production process is unstable or energy consumption is big or technological operation is complicated or cost is higher or environment is had pollution or the like defective in various degree.
Summary of the invention
The object of the present invention is to provide a kind of CO 2Absorbing separator.
The present invention also aims to a kind of above-mentioned CO that utilizes 2Absorbing separator hot potash method absorption and separation CO 2Method.
A kind of CO 2Absorbing separator, this device consists of: CO 2Steel cylinder 1 links to each other with air accumulator 3 through pipeline, and first needle valve 8 is arranged on its pipeline; Air accumulator 3 places thermostat water bath 2, and digital precision Pressure gauge 10 is arranged on the air accumulator 3; Air accumulator 3 links to each other with vavuum pump 6 with absorption bottle 5 respectively through pipeline, and second needle valve 7, the 3rd needle valve 9 are wherein arranged respectively on the pipeline; Absorption bottle 5 is arranged in constant temperature blender with magnetic force 4.
A kind of said apparatus hot potash method absorption and separation CO that utilizes 2Method, this method is carried out according to the following steps:
1) preparation absorption liquid: with water is that solvent adds absorbent, activator and corrosion inhibiter preparation absorption liquid, and wherein the mass percent of each material is in the absorption liquid: absorbent is 5% ~ 50%; Activator is 0.5% ~ 10%; Corrosion inhibiter is 0.2% ~ 1%.
2) in absorption bottle 5, add the absorption liquid that step 1) is prepared, add the rotor of constant temperature blender with magnetic force 4, sealing then;
3) absorption liquid in the stirring absorption bottle 5, the temperature that thermostat water bath 2 is set is 283K ~ 365K.
4) open CO 2Steel cylinder 1, gas storage is 100KPa ~ 200KPa to pressure in air accumulator 3.
Absorbent described in the step 1) is one or more in potash, sodium carbonate, magnesium carbonate, the lithium carbonate.
Activator described in the step 1) is one or more in kodalk, potassium metaborate, the lithium metaborate.
Corrosion inhibiter described in the step 1) is one or more in sodium metavanadate, potassium metavanadate, lithium metavanadate, the ammonium metavanadate.
Beneficial effect of the present invention is: overcome existing catalyst and opened CO 2Loss is many and cost is higher in the absorption process; The problem of environmental pollution; Deficiency and defective that lyosoption exists have been solved in industrialization process; The catalyst system and catalyzing based on solution of potassium carbonate that thereby a kind of novel, efficient, wide material sources are provided, cost is cheap and borderless, eco-friendly catalyst forms, this method can be used for CO in the biogas 2Absorption and separation.
Description of drawings
Fig. 1 is CO 2Absorbing separator;
Wherein each label is: 1-CO 2Steel cylinder; The 2-thermostat water bath; The 3-air accumulator; The 4-constant temperature blender with magnetic force; The 5-absorption bottle; The 6-vavuum pump; 7,8, the 9-needle valve; 10-digital precision Pressure gauge.
The specific embodiment
Below in conjunction with embodiment technical scheme of the present invention is further specified, following examples do not produce restriction to the present invention.
CO as shown in Figure 1 2Absorbing separator, CO 2Steel cylinder 1 links to each other with air accumulator 3 through pipeline, and first needle valve 8 is arranged on its pipeline; Air accumulator 3 places thermostat water bath 2, and digital precision Pressure gauge 10 is arranged on the air accumulator 3; Air accumulator 3 links to each other with vavuum pump 6 with absorption bottle 5 respectively through pipeline, and second needle valve 7, the 3rd needle valve 9 are wherein arranged respectively on the pipeline; Absorption bottle 5 is arranged in constant temperature blender with magnetic force 4.
During operation, in absorption bottle 5, add absorption liquid, add the rotor of constant temperature blender with magnetic force 4, then sealing; Stir the absorption liquid in the absorption bottle 5, the temperature of thermostat water bath 2 is set.Open CO 2Steel cylinder 1, gas storage begins absorption experiment to certain pressure intensity in air accumulator 3.
Embodiment 1 (Comparative Examples)
Take by weighing 2.5g potash, 0g kodalk, 0g sodium metavanadate; Be made into the 50g absorption liquid, wherein concentration of potassium carbonate is 5 wt%, joins in the absorption bottle; The rotor that adds constant temperature blender with magnetic force in the absorption bottle, the sealing absorption bottle, gas storage is to 150KPa in air accumulator; It is 293K that the water-bath temperature is set, beginning absorption experiment, wherein CO 2Absorption rate and uptake see table 1.
Embodiment 2
Take by weighing 5g potash, 0.5g kodalk, 0.25g sodium metavanadate; Be made into the 50g absorption liquid, wherein the concentration of sodium carbonate is 10 wt%, joins in the absorption bottle; The rotor that adds constant temperature blender with magnetic force in the absorption bottle, the sealing absorption bottle, gas storage is to 100KPa in air accumulator; It is 303K that the water-bath temperature is set, beginning absorption experiment, wherein CO 2Absorption rate and uptake see table 1.
Embodiment 3
Take by weighing 7.5g sodium carbonate, 1g sodium metavanadate, 0.3g sodium metavanadate; Be made into the 50g absorption liquid, wherein the concentration of sodium carbonate is 15 wt%, joins in the absorption bottle; The rotor that adds constant temperature blender with magnetic force in the absorption bottle, the sealing absorption bottle, gas storage is to 130KPa in air accumulator; It is 365K that the water-bath temperature is set, beginning absorption experiment, wherein CO 2Absorption rate and uptake see table 1.
Embodiment 4
Take by weighing 10g potash, 1.5g potassium metaborate, 0.4g potassium metavanadate; Be made into the 50g absorption liquid, wherein the concentration of potash is 20 wt%, joins in the absorption bottle; The rotor that adds constant temperature blender with magnetic force in the absorption bottle, the sealing absorption bottle, gas storage is to 120KPa in air accumulator; It is 353K that the water-bath temperature is set, beginning absorption experiment, wherein CO 2Absorption rate and uptake see table 1.
Embodiment 5
Take by weighing 12.5g magnesium carbonate, 2.5 kodalks, 0.45g sodium metavanadate; Be made into the 50g absorption liquid, wherein concentration 25 wt% of magnesium carbonate join in the absorption bottle; The rotor that adds constant temperature blender with magnetic force in the absorption bottle, the sealing absorption bottle, gas storage is to 160KPa in air accumulator; It is 333K that the water-bath temperature is set, beginning absorption experiment, wherein CO 2Absorption rate and uptake see table 1.
Embodiment 6
Take by weighing 15g potash, 2g lithium metaborate, 0.2g potassium metavanadate; Be made into the 50g absorption liquid, wherein the concentration of potash is that 30 wt% join in the absorption bottle, adds the rotor of constant temperature blender with magnetic force in the absorption bottle; The sealing absorption bottle, gas storage is to 170KPa in air accumulator, and it is 343K that the water-bath temperature is set; Beginning absorption experiment, wherein CO 2Absorption rate and uptake see table 1.
Embodiment 7
Take by weighing the 17.5g lithium carbonate, 0.25g kodalk, 0.15g lithium metavanadate; Be made into the 50g absorption liquid, wherein the concentration of lithium carbonate is 35 wt%, joins in the absorption bottle; The rotor that adds constant temperature blender with magnetic force in the absorption bottle, the sealing absorption bottle, gas storage is to 180KPa in air accumulator; It is 313K that the water-bath temperature is set, beginning absorption experiment, wherein CO 2Absorption rate and uptake see table 1.
Embodiment 8
Take by weighing 20g potash, 3g kodalk, 0.25g ammonium metavanadate; Be made into the 50g absorption liquid, wherein the concentration of potash is 40 wt%, joins in the absorption bottle; The rotor that adds constant temperature blender with magnetic force in the absorption bottle, the sealing absorption bottle, gas storage is to 170KPa in air accumulator; It is 333K that the water-bath temperature is set, beginning absorption experiment, wherein CO 2Absorption rate and uptake see table 1.
Embodiment 9
Take by weighing 22.5g potash, 4g lithium metaborate, 0.5g sodium metavanadate; Be made into the 50g absorption liquid, wherein the concentration of potash is 45 wt%, joins in the absorption bottle; The rotor that adds constant temperature blender with magnetic force in the absorption bottle, the sealing absorption bottle, gas storage is to 190KPa in air accumulator; It is 323K that the water-bath temperature is set, beginning absorption experiment, wherein CO 2Absorption rate and uptake see table 1.
Embodiment 10
Take by weighing 25g sodium carbonate, 5g kodalk, 0.1g sodium metavanadate; Be made into the 50g absorption liquid, wherein the concentration of sodium carbonate is 50 wt%, joins in the absorption bottle; The rotor that adds constant temperature blender with magnetic force in the absorption bottle, the sealing absorption bottle, gas storage is to 200KPa in air accumulator; It is 360K that the water-bath temperature is set, beginning absorption experiment, wherein CO 2Absorption rate and uptake see table 1.
Table 1 absorbs CO 2Absorption rate and uptake relatively
Figure BDA0000189345531
CO in the table 1 2Absorption rate is 10 -4Molmin -1, for the unit interval absorption liquid absorbs CO 2Mole; CO 2Uptake be that every mol absorption liquid absorbs CO 2Mole.

Claims (5)

1. CO 2Absorbing separator is characterized in that, this device consists of: CO 2Steel cylinder (1) links to each other with air accumulator (3) through pipeline, and first needle valve (8) is arranged on its pipeline; Air accumulator (3) places thermostat water bath (2), and digital precision Pressure gauge (10) is arranged on the air accumulator (3); Air accumulator (3) links to each other with vavuum pump (6) with absorption bottle (5) respectively through pipeline, and second needle valve (7), the 3rd needle valve (9) are wherein arranged respectively on the pipeline; Absorption bottle (5) is arranged in constant temperature blender with magnetic force (4).
2. one kind is utilized the said device hot potash method of claim 1 absorption and separation CO 2Method, it is characterized in that this method is carried out according to the following steps:
1) preparation absorption liquid: with water is that solvent adds absorbent, activator and corrosion inhibiter preparation absorption liquid, and wherein the mass percent of each material is in the absorption liquid: absorbent is 5% ~ 50%; Activator is 0.5% ~ 10%; Corrosion inhibiter is 0.2% ~ 1%.
2) in absorption bottle (5), add the absorption liquid that step 1) is prepared, add the rotor of constant temperature blender with magnetic force (4), sealing then;
3) absorption liquid in the stirring absorption bottle (5), the temperature that thermostat water bath (2) is set is 283K ~ 365K.
4) open CO 2Steel cylinder (1), gas storage is 100KPa ~ 200KPa to pressure in air accumulator (3).
3. hot potash method absorption and separation CO according to claim 2 2Method, it is characterized in that absorbent described in the step 1) is one or more in potash, sodium carbonate, magnesium carbonate, the lithium carbonate.
4. hot potash method absorption and separation CO according to claim 2 2Method, it is characterized in that activator described in the step 1) is one or more in kodalk, potassium metaborate, the lithium metaborate.
5. hot potash method absorption and separation CO according to claim 2 2Method, it is characterized in that corrosion inhibiter described in the step 1) is one or more in sodium metavanadate, potassium metavanadate, lithium metavanadate, the ammonium metavanadate.
CN2012102466079A 2012-07-16 2012-07-16 CO2 absorption separation device and CO2 absorption separation method by hot potash process Pending CN102764578A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103170218A (en) * 2013-04-07 2013-06-26 清华大学 Methane purifying method and system
CN108671725A (en) * 2018-05-23 2018-10-19 四川大学 A kind of saleratus thermal decomposition precipitation CO2The method coupled with blast furnace slag mineralising
CN109803755A (en) * 2016-10-07 2019-05-24 韩国电力公社 Solid raw material for carbon-dioxide absorbent, the dioxide absorbent composition comprising solid raw material and the carbon-dioxide absorbent prepared using solid raw material
CN109868167A (en) * 2019-03-27 2019-06-11 长沙而道新能源科技有限公司 A kind of method of marsh gas power generation

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CN102423620A (en) * 2011-10-26 2012-04-25 东莞市康达机电工程有限公司 Compound decarbonizing solvent for removing carbon dioxide from biogas

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CN1053043A (en) * 1990-11-30 1991-07-17 安庆石油化工总厂设计研究院 From gaseous mixture, remove carbonic acid gas
CN101456537A (en) * 2007-12-11 2009-06-17 南化集团研究院 Method for reducing carbon dioxide in GTL synthesis cycle gas
CN102423620A (en) * 2011-10-26 2012-04-25 东莞市康达机电工程有限公司 Compound decarbonizing solvent for removing carbon dioxide from biogas

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Title
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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103170218A (en) * 2013-04-07 2013-06-26 清华大学 Methane purifying method and system
CN103170218B (en) * 2013-04-07 2015-02-18 清华大学 Methane purifying method and system
CN109803755A (en) * 2016-10-07 2019-05-24 韩国电力公社 Solid raw material for carbon-dioxide absorbent, the dioxide absorbent composition comprising solid raw material and the carbon-dioxide absorbent prepared using solid raw material
US11167261B2 (en) 2016-10-07 2021-11-09 Korea Electric Power Corporation Solid raw material for carbon dioxide absorbent, carbon dioxide absorbent composition comprising same, and carbon dioxide absorbent prepared using same
CN109803755B (en) * 2016-10-07 2022-04-22 韩国电力公社 Solid raw material for carbon dioxide absorbent, composition comprising the same, and carbon dioxide absorbent prepared using the same
CN108671725A (en) * 2018-05-23 2018-10-19 四川大学 A kind of saleratus thermal decomposition precipitation CO2The method coupled with blast furnace slag mineralising
CN109868167A (en) * 2019-03-27 2019-06-11 长沙而道新能源科技有限公司 A kind of method of marsh gas power generation

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Application publication date: 20121107