CN116785890A - Carbon trapping agent, absorption liquid, device, trapping system and application based on amino acid - Google Patents
Carbon trapping agent, absorption liquid, device, trapping system and application based on amino acid Download PDFInfo
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- CN116785890A CN116785890A CN202310887561.7A CN202310887561A CN116785890A CN 116785890 A CN116785890 A CN 116785890A CN 202310887561 A CN202310887561 A CN 202310887561A CN 116785890 A CN116785890 A CN 116785890A
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- Prior art keywords
- carbon dioxide
- carbon
- capture
- agent
- desorption
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- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 132
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 131
- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 124
- 239000007788 liquid Substances 0.000 title claims abstract description 108
- 238000010521 absorption reaction Methods 0.000 title claims abstract description 101
- 150000001413 amino acids Chemical class 0.000 title claims abstract description 62
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 546
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 273
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 273
- 239000000654 additive Substances 0.000 claims abstract description 28
- 230000000996 additive effect Effects 0.000 claims abstract description 25
- 125000003277 amino group Chemical group 0.000 claims abstract description 13
- 238000002156 mixing Methods 0.000 claims abstract description 10
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 claims abstract description 5
- 238000003795 desorption Methods 0.000 claims description 79
- 238000005868 electrolysis reaction Methods 0.000 claims description 66
- 235000001014 amino acid Nutrition 0.000 claims description 58
- FSYKKLYZXJSNPZ-UHFFFAOYSA-N sarcosine Chemical compound C[NH2+]CC([O-])=O FSYKKLYZXJSNPZ-UHFFFAOYSA-N 0.000 claims description 54
- QNAYBMKLOCPYGJ-REOHCLBHSA-N L-alanine Chemical compound C[C@H](N)C(O)=O QNAYBMKLOCPYGJ-REOHCLBHSA-N 0.000 claims description 43
- 235000004279 alanine Nutrition 0.000 claims description 43
- GLUUGHFHXGJENI-UHFFFAOYSA-N Piperazine Chemical compound C1CNCCN1 GLUUGHFHXGJENI-UHFFFAOYSA-N 0.000 claims description 28
- 108010077895 Sarcosine Proteins 0.000 claims description 27
- 229940043230 sarcosine Drugs 0.000 claims description 27
- 238000000034 method Methods 0.000 claims description 19
- 230000008569 process Effects 0.000 claims description 17
- 229910021645 metal ion Inorganic materials 0.000 claims description 16
- KDXKERNSBIXSRK-UHFFFAOYSA-N Lysine Natural products NCCCCC(N)C(O)=O KDXKERNSBIXSRK-UHFFFAOYSA-N 0.000 claims description 14
- 239000004472 Lysine Substances 0.000 claims description 14
- 238000002360 preparation method Methods 0.000 claims description 12
- ONIBWKKTOPOVIA-BYPYZUCNSA-N L-Proline Chemical compound OC(=O)[C@@H]1CCCN1 ONIBWKKTOPOVIA-BYPYZUCNSA-N 0.000 claims description 11
- OUYCCCASQSFEME-QMMMGPOBSA-N L-tyrosine Chemical compound OC(=O)[C@@H](N)CC1=CC=C(O)C=C1 OUYCCCASQSFEME-QMMMGPOBSA-N 0.000 claims description 11
- ONIBWKKTOPOVIA-UHFFFAOYSA-N Proline Natural products OC(=O)C1CCCN1 ONIBWKKTOPOVIA-UHFFFAOYSA-N 0.000 claims description 11
- OUYCCCASQSFEME-UHFFFAOYSA-N tyrosine Natural products OC(=O)C(N)CC1=CC=C(O)C=C1 OUYCCCASQSFEME-UHFFFAOYSA-N 0.000 claims description 11
- -1 carbonic acid compound Chemical class 0.000 claims description 7
- DHMQDGOQFOQNFH-UHFFFAOYSA-N Glycine Chemical compound NCC(O)=O DHMQDGOQFOQNFH-UHFFFAOYSA-N 0.000 claims description 6
- KDXKERNSBIXSRK-YFKPBYRVSA-N L-lysine Chemical compound NCCCC[C@H](N)C(O)=O KDXKERNSBIXSRK-YFKPBYRVSA-N 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 claims description 6
- 230000007246 mechanism Effects 0.000 claims description 4
- MTCFGRXMJLQNBG-REOHCLBHSA-N (2S)-2-Amino-3-hydroxypropansäure Chemical compound OC[C@H](N)C(O)=O MTCFGRXMJLQNBG-REOHCLBHSA-N 0.000 claims description 3
- 239000004475 Arginine Substances 0.000 claims description 3
- WHUUTDBJXJRKMK-UHFFFAOYSA-N Glutamic acid Natural products OC(=O)C(N)CCC(O)=O WHUUTDBJXJRKMK-UHFFFAOYSA-N 0.000 claims description 3
- 239000004471 Glycine Substances 0.000 claims description 3
- ODKSFYDXXFIFQN-BYPYZUCNSA-P L-argininium(2+) Chemical compound NC(=[NH2+])NCCC[C@H]([NH3+])C(O)=O ODKSFYDXXFIFQN-BYPYZUCNSA-P 0.000 claims description 3
- WHUUTDBJXJRKMK-VKHMYHEASA-N L-glutamic acid Chemical compound OC(=O)[C@@H](N)CCC(O)=O WHUUTDBJXJRKMK-VKHMYHEASA-N 0.000 claims description 3
- ZDXPYRJPNDTMRX-VKHMYHEASA-N L-glutamine Chemical compound OC(=O)[C@@H](N)CCC(N)=O ZDXPYRJPNDTMRX-VKHMYHEASA-N 0.000 claims description 3
- HNDVDQJCIGZPNO-YFKPBYRVSA-N L-histidine Chemical compound OC(=O)[C@@H](N)CC1=CN=CN1 HNDVDQJCIGZPNO-YFKPBYRVSA-N 0.000 claims description 3
- ROHFNLRQFUQHCH-YFKPBYRVSA-N L-leucine Chemical compound CC(C)C[C@H](N)C(O)=O ROHFNLRQFUQHCH-YFKPBYRVSA-N 0.000 claims description 3
- COLNVLDHVKWLRT-QMMMGPOBSA-N L-phenylalanine Chemical compound OC(=O)[C@@H](N)CC1=CC=CC=C1 COLNVLDHVKWLRT-QMMMGPOBSA-N 0.000 claims description 3
- AYFVYJQAPQTCCC-GBXIJSLDSA-N L-threonine Chemical compound C[C@@H](O)[C@H](N)C(O)=O AYFVYJQAPQTCCC-GBXIJSLDSA-N 0.000 claims description 3
- QIVBCDIJIAJPQS-VIFPVBQESA-N L-tryptophane Chemical compound C1=CC=C2C(C[C@H](N)C(O)=O)=CNC2=C1 QIVBCDIJIAJPQS-VIFPVBQESA-N 0.000 claims description 3
- KZSNJWFQEVHDMF-BYPYZUCNSA-N L-valine Chemical compound CC(C)[C@H](N)C(O)=O KZSNJWFQEVHDMF-BYPYZUCNSA-N 0.000 claims description 3
- ROHFNLRQFUQHCH-UHFFFAOYSA-N Leucine Natural products CC(C)CC(N)C(O)=O ROHFNLRQFUQHCH-UHFFFAOYSA-N 0.000 claims description 3
- MTCFGRXMJLQNBG-UHFFFAOYSA-N Serine Natural products OCC(N)C(O)=O MTCFGRXMJLQNBG-UHFFFAOYSA-N 0.000 claims description 3
- AYFVYJQAPQTCCC-UHFFFAOYSA-N Threonine Natural products CC(O)C(N)C(O)=O AYFVYJQAPQTCCC-UHFFFAOYSA-N 0.000 claims description 3
- 239000004473 Threonine Substances 0.000 claims description 3
- QIVBCDIJIAJPQS-UHFFFAOYSA-N Tryptophan Natural products C1=CC=C2C(CC(N)C(O)=O)=CNC2=C1 QIVBCDIJIAJPQS-UHFFFAOYSA-N 0.000 claims description 3
- KZSNJWFQEVHDMF-UHFFFAOYSA-N Valine Natural products CC(C)C(N)C(O)=O KZSNJWFQEVHDMF-UHFFFAOYSA-N 0.000 claims description 3
- ODKSFYDXXFIFQN-UHFFFAOYSA-N arginine Natural products OC(=O)C(N)CCCNC(N)=N ODKSFYDXXFIFQN-UHFFFAOYSA-N 0.000 claims description 3
- 239000004220 glutamic acid Substances 0.000 claims description 3
- 235000013922 glutamic acid Nutrition 0.000 claims description 3
- ZDXPYRJPNDTMRX-UHFFFAOYSA-N glutamine Natural products OC(=O)C(N)CCC(N)=O ZDXPYRJPNDTMRX-UHFFFAOYSA-N 0.000 claims description 3
- HNDVDQJCIGZPNO-UHFFFAOYSA-N histidine Natural products OC(=O)C(N)CC1=CN=CN1 HNDVDQJCIGZPNO-UHFFFAOYSA-N 0.000 claims description 3
- COLNVLDHVKWLRT-UHFFFAOYSA-N phenylalanine Natural products OC(=O)C(N)CC1=CC=CC=C1 COLNVLDHVKWLRT-UHFFFAOYSA-N 0.000 claims description 3
- 239000003115 supporting electrolyte Substances 0.000 claims description 3
- 239000004474 valine Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims 1
- 238000005265 energy consumption Methods 0.000 abstract description 45
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 99
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 91
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 description 46
- 229910021529 ammonia Inorganic materials 0.000 description 45
- 239000011701 zinc Substances 0.000 description 28
- 239000000203 mixture Substances 0.000 description 26
- PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical compound NCCN PIICEJLVQHRZGT-UHFFFAOYSA-N 0.000 description 25
- 239000001103 potassium chloride Substances 0.000 description 23
- 235000011164 potassium chloride Nutrition 0.000 description 23
- 239000003792 electrolyte Substances 0.000 description 18
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 17
- 235000011114 ammonium hydroxide Nutrition 0.000 description 17
- 239000007789 gas Substances 0.000 description 16
- 230000000052 comparative effect Effects 0.000 description 13
- 238000006243 chemical reaction Methods 0.000 description 11
- 239000002904 solvent Substances 0.000 description 11
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 9
- 239000000126 substance Substances 0.000 description 8
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 7
- 239000003546 flue gas Substances 0.000 description 7
- 238000004070 electrodeposition Methods 0.000 description 6
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 6
- 229910052725 zinc Inorganic materials 0.000 description 6
- 125000004122 cyclic group Chemical group 0.000 description 5
- 238000000926 separation method Methods 0.000 description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 4
- 150000001412 amines Chemical class 0.000 description 4
- 238000011084 recovery Methods 0.000 description 4
- VZGDMQKNWNREIO-UHFFFAOYSA-N tetrachloromethane Chemical compound ClC(Cl)(Cl)Cl VZGDMQKNWNREIO-UHFFFAOYSA-N 0.000 description 4
- 229910052723 transition metal Inorganic materials 0.000 description 4
- 150000003624 transition metals Chemical class 0.000 description 4
- 125000000217 alkyl group Chemical group 0.000 description 3
- 239000003011 anion exchange membrane Substances 0.000 description 3
- 230000005595 deprotonation Effects 0.000 description 3
- 238000010537 deprotonation reaction Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
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- 238000011069 regeneration method Methods 0.000 description 3
- 238000004088 simulation Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- HZAXFHJVJLSVMW-UHFFFAOYSA-N 2-Aminoethan-1-ol Chemical compound NCCO HZAXFHJVJLSVMW-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 description 2
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 2
- PTFCDOFLOPIGGS-UHFFFAOYSA-N Zinc dication Chemical group [Zn+2] PTFCDOFLOPIGGS-UHFFFAOYSA-N 0.000 description 2
- 239000006096 absorbing agent Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000006477 desulfuration reaction Methods 0.000 description 2
- 230000023556 desulfurization Effects 0.000 description 2
- 238000004090 dissolution Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000009472 formulation Methods 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 235000010755 mineral Nutrition 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 235000015497 potassium bicarbonate Nutrition 0.000 description 2
- 229910000028 potassium bicarbonate Inorganic materials 0.000 description 2
- 239000011736 potassium bicarbonate Substances 0.000 description 2
- TYJJADVDDVDEDZ-UHFFFAOYSA-M potassium hydrogencarbonate Chemical compound [K+].OC([O-])=O TYJJADVDDVDEDZ-UHFFFAOYSA-M 0.000 description 2
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonium chloride Substances [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-M Bicarbonate Chemical compound OC([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-M 0.000 description 1
- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical compound [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 150000001721 carbon Chemical class 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 230000001351 cycling effect Effects 0.000 description 1
- 230000009615 deamination Effects 0.000 description 1
- 238000006481 deamination reaction Methods 0.000 description 1
- 238000005262 decarbonization Methods 0.000 description 1
- 230000003009 desulfurizing effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 235000019256 formaldehyde Nutrition 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 231100000956 nontoxicity Toxicity 0.000 description 1
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000002407 reforming Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 235000017557 sodium bicarbonate Nutrition 0.000 description 1
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000001926 trapping method Methods 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
Classifications
-
- 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
- B01D53/1456—Removing acid components
- B01D53/1475—Removing carbon dioxide
-
- 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
- B01D53/1425—Regeneration of liquid absorbents
-
- 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
- B01D53/1493—Selection of liquid materials for use as absorbents
-
- 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
- B01D53/18—Absorbing units; Liquid distributors therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2252/00—Absorbents, i.e. solvents and liquid materials for gas absorption
- B01D2252/10—Inorganic absorbents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2252/00—Absorbents, i.e. solvents and liquid materials for gas absorption
- B01D2252/20—Organic absorbents
- B01D2252/204—Amines
- B01D2252/20494—Amino acids, their salts or derivatives
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
Abstract
The application provides an amino acid-based carbon trapping agent, an absorption liquid, a device, a trapping system and application, wherein the carbon trapping agent is used for absorbing and/or trapping carbon dioxide; the carbon trapping agent comprises amino acid and alkaline additive; or the carbon trapping agent comprises a product obtained by mixing the amino acid and the alkaline additive; in this way, the carbon capture agent comprises a deprotonated carboxyl group and a deprotonated amino group, the deprotonated amino group comprising-NH 2 -NH, -N. The application can improve the circulation stability of carbon dioxide trapping and reduce the energy consumption of carbon dioxide trapping.
Description
Technical Field
The application relates to carbon dioxide treatment, in particular to an amino acid-based carbon trapping agent, an absorption liquid, a device, a trapping system and application.
Background
In recent years, global warming by greenhouse gases, particularly carbon dioxide, has become a close concern worldwide. However, the environmental problems caused by carbon dioxide have been very prominent so far, and therefore, how to effectively capture carbon dioxide in flue gas is a problem that needs to be solved at present.
The Chinese patent (study before the inventor) issued with publication No. CN113578025B discloses a method and a system for capturing carbon dioxide in flue gas. The trapping method comprises the following steps: delivering the flue gas containing carbon dioxide into an absorption device for absorbing the carbon dioxide to obtain absorption liquid and purified gas; the absorption liquid is conveyed into an anode chamber of an electroabsorption device for desorption, so as to obtain a gas-liquid mixture containing a metal/ammonia coordination compound and carbon dioxide; carrying out gas-liquid separation treatment on the gas-liquid mixture to obtain carbon dioxide gas and separation liquid; delivering the separating liquid into a cathode chamber of the electroabsorption device, and enabling the separating liquid to have an electro-deposition effect in the cathode chamber to obtain deposited metal and ammonia-containing solution; the ammonia-containing solution is conveyed to the absorption device for absorption of carbon dioxide again. Although the patent can realize the absorption and desorption of carbon dioxide in the flue gas, the cyclic stability of the patent is poor, and the energy consumption of electrolysis is obviously increased after multiple operation.
In view of the foregoing, it would be desirable to provide an amino acid-based carbon capture agent, absorption liquid, apparatus, capture system and application that address or at least mitigate the above-described technical drawbacks of poor cycling stability and significant increases in energy consumption.
Disclosure of Invention
The application mainly aims to provide an amino acid-based carbon trapping agent, an absorption liquid, a device, a trapping system and application, and aims to solve the technical problems of poor circulation stability and obviously increased energy consumption.
To achieve the above object, the present application provides a carbon capture agent for absorption and/or capture of carbon dioxide; the carbon capture agent comprises a deprotonated carboxyl group and a deprotonated amino group, and the deprotonated amino group comprises-NH 2 -NH, -N.
The present application also provides an amino acid-based carbon capture agent for absorption and/or capture of carbon dioxide;
the carbon trapping agent comprises amino acid and alkaline additive; alternatively, the carbon capture agent includes a product obtained by mixing the amino acid and the basic additive.
Further, the amino acid has a vapor pressure of not more than 1.31kPa at room temperature.
Further, the amino acid comprises one or more of alanine, sarcosine, glycine, lysine, proline, glutamic acid, arginine, tryptophan, serine, threonine, lysine, histidine, valine, leucine, tyrosine, phenylalanine, glutamine;
and/or the alkaline additive comprises one or more of an alkaline hydroxide and an alkaline carbonic acid compound.
Further, the molar ratio of the amino acid to the basic additive is 0.2-8:1, a step of;
and/or the concentration of the amino acid is 0.2-8mol/L.
Further, piperazine is also included in the carbon capture agent; the molar ratio of the amino acid to the piperazine is 0.2-8:1.
further, the carbon capture agent further comprises a supporting electrolyte.
The application also provides a preparation method of the carbon trapping agent, wherein the carbon trapping agent is used for absorbing and/or trapping carbon dioxide; the preparation method comprises the following steps: mixing the amino acid with the alkaline additive to obtain the carbon trapping agent.
The application also provides an application of the carbon trapping agent or the carbon trapping agent prepared by the preparation method in carbon dioxide absorption and/or carbon dioxide trapping.
Further, the step of carbon dioxide absorption includes: the carbon trapping agent is contacted with a gas to be treated containing carbon dioxide and is absorbed, so that carbon dioxide absorption liquid is obtained;
the step of carbon dioxide capture comprises:
the carbon trapping agent is contacted with a gas to be treated containing carbon dioxide and is absorbed, so that carbon dioxide absorption liquid is obtained;
and electrolyzing the carbon dioxide absorption liquid to desorb carbon dioxide in the carbon dioxide absorption liquid, so as to obtain a desorption liquid and desorbed carbon dioxide.
Further, the step of capturing carbon dioxide further comprises: electrolyzing the desorption solution to enable metal ions combined with the carbon trapping agent to be electrodeposited, so as to obtain the carbon trapping agent separated from the metal ions;
wherein the desorption liquid contains the carbon trapping agent, and the carbon trapping agent is combined with metal ions from an electrode.
The application also provides a carbon dioxide absorbing device, wherein the carbon dioxide absorbing device is provided with the carbon trapping agent absorbing agent or the carbon trapping agent prepared by the preparation method.
The application also provides a carbon dioxide trapping system, which comprises a carbon dioxide absorbing device and a carbon dioxide desorbing device;
the carbon dioxide absorbing device is provided with the carbon trapping agent or the carbon trapping agent prepared by the preparation method;
the carbon dioxide absorption device and the carbon dioxide desorption device are communicated, so that carbon dioxide absorption liquid generated in the carbon dioxide absorption device is conveyed to the carbon dioxide desorption device continuously or intermittently, and the carbon dioxide desorption device is provided with an electrolysis mechanism.
The application also provides a carbon dioxide absorption liquid for desorption and/or trapping of carbon dioxide;
the carbon dioxide absorbing liquid contains the carbon trapping agent or the carbon trapping agent prepared by the preparation method, wherein the carbon trapping agent is combined with carbon dioxide.
The application also provides an application of the carbon dioxide absorption liquid in carbon dioxide desorption and/or carbon dioxide capturing.
Further, the step of desorbing carbon dioxide comprises: electrolyzing the carbon dioxide absorption liquid to desorb carbon dioxide in the carbon dioxide absorption liquid;
the carbon dioxide capturing process comprises the following steps:
obtaining the carbon dioxide absorption liquid;
and electrolyzing the carbon dioxide absorption liquid to desorb the carbon dioxide in the carbon dioxide absorption liquid.
The application also provides a carbon dioxide desorption device, wherein the anode chamber of the carbon dioxide desorption device is provided with the carbon dioxide absorption liquid.
The application also provides a carbon dioxide trapping system, which comprises a carbon dioxide absorbing device and a carbon dioxide desorbing device;
the anode chamber of the carbon dioxide desorption device is provided with the carbon dioxide absorption liquid;
the anode chamber of the carbon dioxide desorption device and the carbon dioxide absorption device are communicated and arranged to continuously or intermittently receive the carbon dioxide absorption liquid from the carbon dioxide absorption device.
Compared with the prior art, the application has at least the following advantages:
the patent provides a carbon trapping agent based on amino acid, through adopting this carbon trapping agent to absorb carbon dioxide to carry out the electrolysis in carbon dioxide desorption in-process, can promote the cyclic stability of carbon dioxide entrapment, and reduce electrolysis energy consumption. In the application, the amino acid can be flexibly compounded with other amino acids, alkaline additives and the like, so that the applicability of the amino acid in carbon dioxide capturing is improved, and the carbon dioxide capturing process has the characteristics of small loss, stable operation, excellent cycle performance, low energy consumption, low operation and maintenance cost, greenness, no toxicity, environmental friendliness and the like.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully, and it is apparent that the described embodiments are only some, but not all, embodiments of the present application. All other embodiments, based on the embodiments of the application, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the application.
Moreover, the technical solutions of the embodiments of the present application may be combined with each other, but it is necessary to be based on the fact that those skilled in the art can implement the embodiments, and when the technical solutions are contradictory or cannot be implemented, it should be considered that the combination of the technical solutions does not exist, and is not within the scope of protection claimed by the present application.
It is to be appreciated that the prior art generally uses inorganic ammonia (NH 3 ) As CO 2 Trapping solvent and transition metal (zinc, nickel, copper, etc.) as dielectric for high efficiency and low consumption CO 2 And (5) capturing.
The prior art mainly comprises the following four steps (see fig. 1 in the chinese application with grant publication No. CN113578025B for details):
1. desulfurizing and deaminizing pretreatment
Absorption of the recovery of the Leaching WaterThe ammonia escaping from the tower is used for flue gas desulfurization so as to realize the double functions of desulfurization and deamination. Previous studies have shown that: the process has high ammonia recovery rate (more than 99%), low ammonia emission concentration (less than 25 ppmv) and SO 2 High removal rate (> 99%).
2、CO 2 Ammonia absorption (absorption tower)
The pretreated flue gas enters CO 2 Absorption tower and electrodeposition coupled ammonia regenerated metal ion (Me 2+ ) lean/CO 2 Lean ammonia solution contact decarbonization (equation below), me after capture 2+ lean/CO 2 The rich solution is sent to the cell anode chamber.
3. Electrodissolving coupled CO 2 Desorption (anode)
The coordination ability of the metal ion and ammonia is obviously stronger than that of CO 2 Electrochemically dissolved metal ions with CO in the anode chamber 2 Competing coordination of amino groups to break NH 3 -CO 2 Bond release CO 2 (reaction formula is shown below), me after desorption 2+ rich/CO 2 -the lean solution is sent to the cathode compartment of the electrolyzer.
Me (s) Is a transition metal such as zinc, copper, nickel, etc
4. Electrodeposition-coupled ammonia regeneration (cathode)
In the cathode chamber, me (NH) 3 ) n 2+ Electrodepositing to Me (s) The reaction formula is shown below, and ammonia regeneration is promoted, and at the moment, the solution becomes Me 2 + lean/CO 2 -lean carrier solution.
Ammonia regenerationThe catholyte is returned to the CO again 2 The absorption tower carries out the next carbon capture cycle. An anion exchange membrane exists between the catholyte and the anolyte; a heat exchanger is arranged between the absorption tower and the electrolytic cell; a flash tank is present in the path of the anolyte to the catholyte for gas-liquid separation. After a certain number of cycles, the anode and cathode will exchange or the direction of flow of the anolyte and catholyte will alternate periodically to prevent complete dissolution of the anodic metal.
However, the carbon trapping agent adopted in the prior art is inorganic ammonia, so that the carbon trapping agent has strong volatility, large loss, unstable operation, poor cycle performance and high operation and maintenance cost, and can also cause the increase of energy consumption in the electrolysis process; in addition, the inorganic ammonia has toxicity and can pollute the environment, and the volatilization recovery system of the inorganic ammonia is more complex, the process is long, and the investment cost is high.
Based on this, the present application provides an amino acid based carbon capture agent for the absorption and/or capture of carbon dioxide; that is, the carbon capture agent may absorb carbon dioxide and release carbon dioxide under electrolysis conditions.
In the present application, the raw materials of the carbon capture agent include amino acids and basic additives, and thus, it is understood that the carbon capture agent includes amino acids and basic additives. Of course, since the carbon capturing agent is in a liquid state, the carbon capturing agent may further include a solvent in which the amino acid is soluble, and the solvent may include or be one or more of water, cyclohexane, hexane, and carbon tetrachloride.
The reaction of the amino acid with the basic additive, such that the amino acid becomes deprotonated and activates the amino group, is also understood to include the product of the carbon capture agent after mixing the amino acid with the basic additive; the mixing may be performed in the solvent. That is, it is also understood that the carbon capturing agent includes a product obtained by mixing the amino acid and the basic additive in the solvent.
As a preferred embodiment of the present application, the vapor pressure of the amino acid at room temperature (25 ℃) may be not higher than 1.31kPa, that is, may be 0 to 1.31kPa; further, the pressure may be 0.00001Pa to 0.4kPa (temperature 25 ℃).
Illustratively, the amino acid may include or be one or more of alanine, sarcosine, glycine, lysine, proline, glutamic acid, arginine, tryptophan, serine, threonine, lysine, histidine, valine, leucine, tyrosine, phenylalanine, glutamine. The alkaline additive can comprise or be one or more of alkaline hydroxide, alkaline carbonic acid compound, organic amine and inorganic ammonia; further, the alkaline additive may include or be one or more of an alkaline hydroxide, an alkaline carbonate compound. The alkaline hydroxide may include or be one or more of sodium hydroxide and potassium hydroxide; the basic carbonic acid compound may specifically include or be a basic bicarbonate, and the basic carbonic acid compound may include or be one or more of sodium bicarbonate and potassium bicarbonate; the organic amine is generated by chemical reaction of organic substance and ammonia, and has amino (-NH) 2 -NH, -N), the organic amine in the present application typically having a pH greater than 7, does not comprise the amino acid, and may include or be one or more of ethylenediamine and ethanolamine, for example; the chemical formula of the inorganic ammonia is NH 3 The inorganic ammonia may be present in the carbon capture agent in the form of aqueous ammonia.
It should be noted that the inorganic ammonia may be used as the basic additive in the present application as well; and, when inorganic ammonia is included in the alkaline additive, the volatility of inorganic ammonia and the energy consumption of electrolytic absorption can be significantly reduced. Therefore, the carbon trapping agent based on amino acid provided by the application can also be used for reducing the volatility and running energy consumption of inorganic ammonia in the carbon dioxide trapping process. That is, the combination of the carbon trapping agent provided by the present application with the carbon trapping agent based on inorganic ammonia is one of the industrial application modes of the present application.
In order to fully complete the deprotonation and activation of the amino groups of the amino acids, the molar ratio of the amino acids to the basic additive may be 0.2 to 8:1, a step of; further, it may be 0.5 to 5:1.
since the carbon capture agent is typically present in liquid form, the amino acid may be present in the solvent; the concentration of the amino acid can be 0.2-8mol/L; further, it may be 0.5 to 5mol/L. The concentration of the amino acid may be understood as the concentration of the amino acid in the carbon capture agent (the concentration of the amino acid after dissolution in the solvent) and may be understood as the initial concentration of the amino acid in the carbon capture agent (the concentration before the reaction); for example, the carbon capturing agent may be obtained by first obtaining the amino acid solution having the above concentration, and then adding other substances (such as an alkaline additive) to the amino acid solution to mix them.
To increase CO 2 The trapping capacity and the carbon trapping energy consumption are reduced, and piperazine can be also included in the carbon trapping agent; the molar ratio of the amino acid to the piperazine may be 0.2-8:1, a step of; further, it may be 0.5 to 5:1.
since carbon dioxide capture in the present application involves carbon dioxide absorption and electroabsorption of carbon dioxide, a supporting electrolyte such as potassium chloride or the like may be generally further included in the carbon capture agent in order to ensure progress of the electroabsorption process.
According to researches, the carbon trapping agent has at least the following technical mechanism in the process of applying the carbon trapping agent to carbon dioxide trapping:
first, the amino acid requires the addition of a basic substance (e.g., MEA, KOH, or NaOH), which activates the amino group after deprotonation, the chemical reaction is as follows:
then, CO is absorbed in the carbon dioxide absorbing device 2 When the following reaction occurs:
thereafter, the electrically dissolved and coupled CO is generated in the anode chamber of the carbon dioxide desorption device 2 Upon desorption, the following reactions occur:
Me (s) →Me 2+ +2e -
Me 2+ +n - OOCRNH 2 -CO 2 →(-OOCRNH 2 ) n -Me 2+ +nCO 2 ↑
wherein Me is transition metals Zn, cu, ni and the like.
When regeneration of the electrodeposited coupled amino acid occurs in the cathode chamber of the carbon dioxide desorption device, the following reaction occurs:
Me(NH 3 ) n 2+ +2e - →Me (s) +nNH 3
(-OOCRNH 2 ) n -Me 2+ +2e - →Me (s) +-OOCRNH 2
in summary, the application provides a new formulation of electrochemical carbon capture technology, which takes low-volatility, green and environment-friendly amino acid as a core, and flexibly combines with hydroxide (including potassium hydroxide, sodium hydroxide and the like), carbonic acid compound (including sodium bicarbonate, potassium bicarbonate and the like), other amino acid, inorganic ammonia, organic amine and the like to construct and absorb CO 2 A carbon collector formulation.
Based on the effect of the basic additive on the amino acid, the application also provides a carbon capture agent for the absorption and/or capture of carbon dioxide; the carbon capture agent comprises a deprotonated carboxyl group and a deprotonated amino group, and the deprotonated amino group comprises-NH 2 -NH, -N.
Further, the carbon capture agent may further include an alkyl group; that is, the carbon capture agent may be composed of the deprotonated carboxyl group, the deprotonated amino group, and the alkyl group.
Illustratively, the carbon capture agent may have the formula (form of presence):
- OOCRNH 2
wherein R may include or be alkyl.
It is understood that in the present application, deprotonation refers to dehydroions as a result of the introduction of an alkaline additive to an elevated pH.
In order to obtain the carbon trapping agent, the application also provides a preparation method of any of the carbon trapping agents, wherein the carbon trapping agent is used for absorbing and/or trapping carbon dioxide; the preparation method comprises the following steps: mixing the amino acid with the alkaline additive to obtain the carbon trapping agent; the mixing may be performed in the solvent.
Further, the amino acid may be present in the form of an amino acid solution to provide a solvent for the reaction of the amino acid and the basic additive, and the solvent in the preparation method may include or be one or more of water, cyclohexane, hexane, and carbon tetrachloride, and the solvent used in the examples and comparative examples of the present application is water; the carbon capture agent may be in a liquid state.
The application also provides an application of the carbon trapping agent in carbon dioxide absorption and/or carbon dioxide trapping.
It should be noted that the carbon dioxide absorption means: carbon dioxide gas is absorbed into the carbon dioxide absorbing liquid by using a carbon trapping agent, so that the carbon dioxide gas is separated from other gases or substances in the gas to be treated.
The carbon dioxide capture means: firstly, absorbing carbon dioxide gas into a carbon dioxide absorption liquid by adopting a carbon trapping agent; and then, releasing carbon dioxide in a carbon dioxide desorption mode (such as electrolytic absorption), thereby completing the capturing and recycling of the carbon dioxide and obtaining a carbon dioxide product.
Illustratively, the step of carbon dioxide absorption may include:
and (3) contacting and absorbing the carbon trapping agent with a gas to be treated containing carbon dioxide (such as flue gas containing carbon dioxide) to obtain carbon dioxide absorption liquid after absorbing carbon dioxide.
Specifically, the process of contacting the carbon capturing agent with the carbon dioxide-containing gas to be treated may be performed in a carbon dioxide absorption apparatus, specifically, may be performed in a carbon absorption tower.
The step of carbon dioxide capture may comprise:
the carbon trapping agent is contacted with a gas to be treated containing carbon dioxide and is absorbed, so that carbon dioxide absorption liquid is obtained; then, electrolyzing the carbon dioxide absorption liquid to desorb carbon dioxide in the carbon dioxide absorption liquid, so as to obtain a desorption liquid and desorbed carbon dioxide; wherein the desorption liquid contains the carbon trapping agent, and the carbon trapping agent in the desorption liquid is combined with metal ions from an electrode.
Specifically, the process of contacting the carbon capturing agent with the carbon dioxide-containing gas to be treated may be performed in a carbon dioxide absorbing device, thereby producing a carbon dioxide absorbing liquid after absorbing carbon dioxide; and then, conveying the carbon dioxide absorption liquid to a carbon dioxide desorption device, and releasing the carbon dioxide combined with the carbon trapping agent in an electrolytic mode, so as to realize the trapping and recovery of the carbon dioxide.
As a detailed explanation of the carbon dioxide capturing, the step of capturing carbon dioxide may further include: and electrolyzing the desorption solution to enable the metal ions combined with the carbon trapping agent to be electrodeposited, so that the carbon trapping agent separated from the metal ions is obtained.
It is to be appreciated that the release of carbon dioxide is typically carried out in the anode compartment of a carbon dioxide desorption device; that is, the electrode of the anode chamber is electrically dissolved and then combined with the carbon trapping agent in the carbon dioxide absorbing liquid, thereby separating the carbon dioxide from the carbon trapping agent, completing the release of the carbon dioxide, and obtaining the desorption liquid. The separation of carbon dioxide and desorption liquid can be completed in the anode chamber directly.
Electrolysis of the desorption liquid is typically performed in the cathode chamber of a carbon dioxide desorption device; namely, the desorption solution is electrodeposited in the cathode chamber, so that metal ions in the desorption solution are deposited on an electrode of the cathode chamber, and the separation of the carbon trapping agent and the metal ions is completed; the separated carbon capture agent can be reused for carbon dioxide absorption, thereby reforming carbon dioxide absorption liquid.
The application also provides a carbon dioxide absorbing device, wherein the carbon dioxide absorbing device is provided with the carbon trapping agent absorber. Wherein the carbon capture agent may be preset in an absorption chamber of the carbon dioxide absorption device; the carbon capturing agent may be supplied to the carbon dioxide absorbing device from the outside during carbon dioxide absorption.
The application also provides a carbon dioxide trapping system which comprises a carbon dioxide absorbing device and a carbon dioxide desorbing device.
The carbon dioxide absorbing device having therein the carbon capturing agent as described above; the carbon dioxide absorption device and the carbon dioxide desorption device are communicated, so that carbon dioxide absorption liquid generated in the carbon dioxide absorption device is conveyed to the carbon dioxide desorption device continuously or intermittently, and the carbon dioxide desorption device is provided with an electrolysis mechanism.
It is known that, because the carbon dioxide desorption device is an electrodesorption device, the anode chamber and the cathode chamber contained in the carbon dioxide desorption device can be mutually converted under the influence of electricity, so that the carbon dioxide desorption device can be communicated with the anode chamber of the carbon dioxide desorption device or can be simultaneously communicated with the cathode chamber of the carbon dioxide desorption device so as to adapt to the electrodesorption of carbon dioxide after the electric conversion.
It is also known that, since the anode chamber of the carbon dioxide desorption device needs to electrolyze the desorption solution in the cathode chamber after the desorption solution is generated, the anode chamber and the cathode chamber of the carbon dioxide desorption device can be communicated so as to facilitate the delivery of the desorption solution.
The application also provides a carbon dioxide absorption liquid for desorption and/or capture of carbon dioxide; the carbon dioxide absorbing liquid contains the carbon capturing agent according to any one of the above, and the carbon capturing agent in the carbon dioxide absorbing liquid is usually obtained by absorbing carbon dioxide with the carbon capturing agent.
The application also provides an application of the carbon dioxide absorption liquid in carbon dioxide desorption and/or carbon dioxide capturing. It is known that the volatilization rate of the carbon trapping agent can be remarkably reduced in the desorption process of the carbon dioxide absorbing liquid, and the electrolysis energy consumption in the desorption process can be reduced.
Illustratively, the step of carbon dioxide desorption may comprise:
the carbon dioxide absorbing liquid according to any one of the above is electrolyzed to desorb carbon dioxide in the carbon dioxide absorbing liquid, thereby obtaining carbon dioxide gas and desorption liquid in which a carbon capturing agent is bound with metal ions.
In the process of carrying out the electrolysis, the carbon dioxide absorption liquid can be placed in an anode chamber of a carbon dioxide desorption device, and the previous desorption liquid is placed in a cathode chamber of the carbon dioxide desorption device, so that the desorption of carbon dioxide in the anode chamber and the electrodeposition of metal ions in the cathode chamber are simultaneously carried out, and the re-acquisition of a carbon trapping agent is simultaneously realized; the current density of the electrolysis may be 1A/m 2 -500A/m 2 。
The carbon dioxide capture process may include:
obtaining the carbon dioxide absorbing liquid according to any one of the above; the carbon dioxide absorbing liquid may originate from a carbon dioxide absorbing device.
Subjecting the carbon dioxide absorbing solution to any of the above-described electrolysis to desorb carbon dioxide in the carbon dioxide absorbing solution.
The application also provides a carbon dioxide desorption device, wherein the anode chamber of the carbon dioxide desorption device is provided with the carbon dioxide absorption liquid. The carbon dioxide absorbing liquid in the anode chamber may be supplied continuously from the outside or intermittently from the outside. When the carbon dioxide absorbing liquid is continuously supplied to the anode chamber, the supply of the carbon dioxide absorbing liquid and the electrolysis of the carbon dioxide absorbing liquid may be performed simultaneously; when the carbon dioxide absorbing liquid is intermittently supplied to the anode chamber, the carbon dioxide absorbing liquid may be supplied to the anode chamber first, and then the carbon dioxide absorbing liquid may be electrolyzed.
As a detailed description of the carbon dioxide desorption device, the carbon dioxide desorption device is usually an electrolysis adsorption device and is provided with an anode chamber and a cathode chamber, wherein the anode chamber and the cathode chamber are separated by an anion exchange membrane, electrodes in the anode chamber and the cathode chamber can contain transition metals (such as Zn, cu, ni and the like), the electrodes in the anode chamber and the cathode chamber are electrically electrolyzed with an external power supply, and a cover body can be arranged above the anode chamber and the cathode chamber to avoid gas dissipation; the anode chamber and the cathode chamber may also be provided with channels for liquid and/or gas delivery, and corresponding valves.
The application also provides a carbon dioxide trapping system, which comprises a carbon dioxide absorbing device and a carbon dioxide desorbing device; the anode chamber of the carbon dioxide desorption device is provided with the carbon dioxide absorption liquid; the anode chamber of the carbon dioxide desorption device is communicated with the carbon dioxide absorption liquid outlet of the carbon dioxide absorption device so as to continuously or intermittently receive the carbon dioxide absorption liquid from the carbon dioxide absorption device. After the anode chamber of the carbon dioxide desorption device is adjusted, the adjusted anode chamber can also be directly communicated with a carbon absorption liquid outlet of the carbon dioxide absorption device.
The following are specific examples of the present application:
3 comparative example 1: inorganic ammonia (NH) system
1. Take carbon dioxide desorption's analogue means:
the simulation device comprises a first electrolytic chamber and a second electrolytic chamber, wherein the first electrolytic chamber is provided with a first electrode, the second electrolytic chamber is provided with a second electrode, and the first electrode and the second electrode are 7cm 2 The electrode distance is 2cm, the first electrode and the second electrode are electrically connected with an external power supply, and when one of the electrolytic chambers is used as an anode chamber, the other electrolytic chamber is used as a cathode chamber; the first electrolysis chamber and the second electrolysis chamber are separated by an anion exchange membrane, and the upper openings of the first electrolysis chamber and the second electrolysis chamber are sealed with the cover body; the first electrolytic chamber and the second electrolytic chamber are both provided with a carbon dioxide exhaust channel and an electrolyte conveying channel.
2. Preparation of anolyte and catholyte (M stands for mol/L):
the anolyte in the anode chamber is rich in CO 2 Zinc-depleted solution (17.5 mL);
anode liquid composition: 0.2M Zn 2+ +1.2M CO 2 +2m ammonia+2m potassium chloride.
The catholyte in the cathode chamber is lean in CO 2 Zinc-rich content solution (17.5 mL);
catholyte composition: 0.7M Zn 2+ +0.5M CO 2 +2m ammonia+2m potassium chloride.
3. Simulation of electrical desorption:
taking the prepared anode solution as a first electrolyte, taking the prepared cathode solution as a second electrolyte, adopting the simulation device, and performing at 60 ℃ and 100A/m 2 Constant current circulation electrolysis is carried out under the current density; the cyclic electrolysis is performed by electrolysis of the first electrolyte in the cathode chamber.
The specific process of the primary cyclic electrolysis is as follows:
placing a first electrolyte in an anode chamber, a second electrolyte in a cathode chamber at 60 ℃ and 100A/m 2 Performing first electrolysis under the current density, thereby releasing carbon dioxide discharged from the first electrolyte and causing electrodeposition of zinc ions in the second electrolyte; when yang is the yangCO in polar chamber 2 When the discharge amount (amount of substance) reached about 90% (when the carbon content of the solution was about 10% of the initial amount), the first electrolysis was ended; after the first electrolysis is finished, the second electrolyte is subjected to carbon dioxide absorption, so that the concentration of carbon dioxide in the second electrolyte reaches a saturation amount (based on the pH stability);
placing a second electrolyte in the anode chamber, and placing a first electrolyte in the cathode chamber at 60 ℃ and 100A/m 2 Performing second electrolysis under the current density, thereby releasing carbon dioxide in the second electrolyte and causing electrodeposition of zinc ions in the first electrolyte; CO in the anode chamber 2 When the discharge amount (amount of substance) reached about 90% (when the carbon content of the solution was about 10% of the initial amount), the second electrolysis was ended; absorbing carbon dioxide in the first electrolyte to ensure that the concentration of the carbon dioxide reaches a saturation amount (based on the pH stability);
then, the cyclic electrolysis is performed for the subsequent number of times.
The experimental results of this comparative example are as follows:
first cycle electrolysis: ammonia loss 5%, energy consumption 26kJ/mol CO 2 ；
Fifth cycle electrolysis: 28% ammonia loss, 78kJ/mol CO energy consumption 2 ；
Tenth cycle electrolysis: 48% of ammonia loss and 113kJ/mol CO energy consumption 2 。
Note that: "loss" refers to: when the current cycle electrolysis is performed, after the first electrolyte is electrolyzed in the cathode chamber, the loss ratio of the corresponding component in the first electrolyte to the amount of the substance in the initial preparation amount (before the cycle electrolysis) is compared.
"energy consumption" refers to: in the process of the electrolysis cycle, the first electrolyte is subjected to single electrolysis in the cathode chamber to generate electricity consumption.
Example 1: alanine + NaOH
In this example, compared to comparative example 1, only 2M ammonia water in the anolyte was replaced with 2M alanine+2M sodium hydroxide; the 2M ammonia water in the catholyte was replaced with 2M alanine+2M sodium hydroxide, and the other conditions were kept unchanged.
Namely:
anode liquid composition: 0.2M Zn 2+ +1.2M CO 2 +2m alanine+2m sodium hydroxide+2m potassium chloride;
catholyte composition: 0.7M Zn 2+ +0.5M CO 2 +2m alanine+2m sodium hydroxide+2m potassium chloride.
The experimental results of this example are as follows:
first cycle electrolysis: alanine loss 0.01%, energy consumption 45kJ/mol CO 2 ；
Fifth cycle electrolysis: alanine loss 0.04%, energy consumption 44kJ/mol CO 2 ；
Tenth cycle electrolysis: alanine loss 0.11%, energy consumption 48kJ/mol CO 2 。
Example 2: alanine + sarcosine + NaOH
In this example, compared with comparative example 1, only 2M ammonia water in the anolyte was replaced with 1M alanine+1M sarcosine+2M sodium hydroxide; the 2M ammonia water in the catholyte was replaced with 1M alanine+1M sarcosine+2M sodium hydroxide, and the other conditions were kept unchanged.
Namely:
anode liquid composition: 0.2M Zn 2+ +1.2M CO 2 +1M alanine+1M sarcosine+2M sodium hydroxide+2M potassium chloride;
catholyte composition: 0.7M Zn 2+ +0.5M CO 2 +1M alanine+1M sarcosine+2M sodium hydroxide+2M potassium chloride.
The experimental results of this example are as follows:
first cycle electrolysis: alanine + sarcosine loss 0.02%, energy consumption 36kJ/mol CO 2 ；
Fifth cycle electrolysis: alanine + sarcosine loss 0.07%, energy consumption 39kJ/mol CO 2 ；
Tenth cycle electrolysis: alanine + sarcosine loss 0.13%, energy consumption 38kJ/mol CO 2 。
Example 3: alanine + ethylenediamine
In this example, compared with comparative example 1, only 2M ammonia in the anolyte was replaced with 1M alanine+1M ethylenediamine; the 2M ammonia water in the catholyte was replaced with 1M alanine+1M ethylenediamine, and the other conditions remained unchanged.
Namely:
anode liquid composition: 0.2M Zn 2+ +1.2M CO 2 +1M alanine+1M ethylenediamine+2M potassium chloride;
catholyte composition: 0.7M Zn 2+ +0.5M CO 2 +1M alanine+1M ethylenediamine+2M potassium chloride.
The experimental results of this example are as follows:
first cycle electrolysis: alanine and ethylenediamine loss of 0.01%, energy consumption of 64kJ/mol CO 2 ；
Fifth cycle electrolysis: alanine and ethylenediamine loss of 0.03%, energy consumption of 69kJ/mol CO 2 ；
Tenth cycle electrolysis: alanine and ethylenediamine loss of 0.05%, energy consumption of 73kJ/mol CO 2 。
Example 4: alanine + ethylenediamine
In this example, compared with comparative example 1, only 2M ammonia in the anolyte was replaced with 2M alanine+2M ethylenediamine; the 2M ammonia water in the catholyte was replaced with 2M alanine+2M ethylenediamine, and the other conditions remained unchanged.
Namely:
anode liquid composition: 0.2M Zn 2+ +1.2M CO 2 +2m alanine+2m ethylenediamine+2m potassium chloride;
catholyte composition: 0.7M Zn 2+ +0.5M CO 2 +2m alanine+2m ethylenediamine+2m potassium chloride.
The experimental results of this example are as follows:
first cycle electrolysis: alanine and ethylenediamine loss of 0.01%, energy consumption of 52kJ/mol CO 2 ；
Fifth cycle electrolysis: alanine and ethylenediamine loss of 0.04%, energy consumption of 55kJ/mol CO 2 ；
Tenth cycle electrolysis: alanine and ethylenediamine loss 0.09%, energy consumption 51kJ/mol CO 2 。
Example 5: alanine + ethylenediamine + piperazine
In this example, compared with comparative example 1, only 2M ammonia in the anolyte was replaced with 1M alanine+1M ethylenediamine+1M piperazine; 2M ammonia in the catholyte was replaced with 1M alanine+1M ethylenediamine+1M piperazine, and the other conditions were kept unchanged.
Namely:
anode liquid composition: 0.2M Zn 2+ +1.2M CO 2 +1M alanine+1M ethylenediamine+1M piperazine+2M potassium chloride;
catholyte composition: 0.7M Zn 2+ +0.5M CO 2 +1M alanine+1M ethylenediamine+1M piperazine+2M potassium chloride.
The experimental results of this example are as follows:
first cycle electrolysis: alanine, ethylenediamine and piperazine loss of 0.002%, energy consumption of 45kJ/molCO 2 ；
Fifth cycle electrolysis: alanine + ethylenediamine + piperazine loss 0.007%, energy consumption 44kJ/molCO 2 ；
Tenth cycle electrolysis: alanine, ethylenediamine and piperazine loss 0.011%, energy consumption 43kJ/molCO 2 。
Example 6: sarcosine + NaOH
In this example, compared with comparative example 1, only 2M ammonia water in the anolyte was replaced with 2M sarcosine+2m sodium hydroxide; the 2M ammonia water in the catholyte was replaced with 2M sarcosine+2M sodium hydroxide, and the other conditions remained unchanged.
Namely:
anode liquid composition: 0.2M Zn 2+ +1.2M CO 2 +2m sarcosine +2m sodium hydroxide +2m potassium chloride;
catholyte composition: 0.7M Zn 2+ +0.5M CO 2 +2m sarcosine +2m sodium hydroxide +2m potassium chloride.
The experimental results of this example are as follows:
first cycle electrolysis: sarcosine loss 0.03%, energy consumption 55kJ/mol CO 2 ；
Fifth cycle electrolysis: sarcosine loss 0.07%, energy consumption 62kJ/mol CO 2 ；
Tenth cycle electrolysis: sarcosine loss 0.12%Energy consumption 70kJ/molCO 2 。
3 Example 7: sarcosine + inorganic ammonia (NH)
In this example, compared with comparative example 1, only 2M ammonia water in the anolyte was replaced with 2M sarcosine+2m inorganic ammonia; 2M ammonia water in the catholyte is replaced by 2M sarcosine+2M inorganic ammonia, and other conditions are kept unchanged.
Namely:
anode liquid composition: 0.2M Zn 2+ +1.2M CO 2 +2m sarcosine +2m mineral ammonia +2m potassium chloride;
catholyte composition: 0.7M Zn 2+ +0.5M CO 2 +2m sarcosine +2m mineral ammonia +2m potassium chloride.
The experimental results of this example are as follows:
first cycle electrolysis: sarcosine and inorganic ammonia loss of 0.1 percent, and energy consumption of 41kJ/molCO 2 ；
Fifth cycle electrolysis: sarcosine and inorganic ammonia loss of 0.4%, and energy consumption of 43kJ/mol CO 2 ；
Tenth cycle electrolysis: sarcosine and inorganic ammonia loss of 0.9%, and energy consumption of 44kJ/mol CO 2 。
Example 8: proline + NaOH
In this example, compared to comparative example 1, only 2M ammonia water in the anolyte was replaced with 2M proline+2m sodium hydroxide; the 2M ammonia water in the catholyte was replaced with 2M proline+2M sodium hydroxide, and the other conditions remained unchanged.
Namely:
anode liquid composition: 0.2M Zn 2+ +1.2M CO 2 +2m proline +2m sodium hydroxide +2m potassium chloride;
catholyte composition: 0.7M Zn 2+ +0.5M CO 2 +2m proline +2m sodium hydroxide +2m potassium chloride.
The experimental results of this example are as follows:
first cycle electrolysis: proline loss 0.04%, energy consumption 59kJ/mol CO 2 ；
Fifth cycle electrolysis: proline loss 0.08%, energy consumption 61kJ/mol CO 2 ；
Tenth cycle electrolysis: proline loss 0.11% and energy consumption 65kJ/mol CO 2 。
Example 9: lysine + NaOH
In this example, compared to comparative example 1, only 2M ammonia water in the anolyte was replaced with 2M lysine+2m sodium hydroxide; the 2M ammonia water in the catholyte was replaced with 2M lysine+2M sodium hydroxide, and the other conditions were kept unchanged.
Namely:
anode liquid composition: 0.2M Zn 2+ +1.2M CO 2 +2m lysine+2m sodium hydroxide+2m potassium chloride;
catholyte composition: 0.7M Zn 2+ +0.5M CO 2 +2m lysine+2m sodium hydroxide+2m potassium chloride.
The experimental results of this example are as follows:
first cycle electrolysis: lysine loss of 0.06%, energy consumption of 63kJ/mol CO 2 ；
Fifth cycle electrolysis: lysine loss of 0.11%, energy consumption of 67kJ/mol CO 2 ；
Tenth cycle electrolysis: lysine loss of 0.19%, energy consumption of 69kJ/mol CO 2 。
Example 10: tyrosine + NaOH
In this example, compared to comparative example 1, only 2M ammonia in the anolyte was replaced with 2M tyrosine+2m sodium hydroxide; the 2M ammonia water in the catholyte was replaced with 2M tyrosine+2M sodium hydroxide, and the other conditions remained unchanged.
Namely:
anode liquid composition: 0.2M Zn 2+ +1.2M CO 2 +2m tyrosine +2m sodium hydroxide +2m potassium chloride;
catholyte composition: 0.7M Zn 2+ +0.5M CO 2 +2m tyrosine +2m sodium hydroxide +2m potassium chloride.
The experimental results of this example are as follows:
first cycle electrolysis: tyrosine loss 0.09%, energy consumption 53kJ/mol CO 2 ；
Fifth stepSub-cycle electrolysis: tyrosine loss 0.17%, energy consumption 58kJ/mol CO 2 ；
Tenth cycle electrolysis: tyrosine loss 0.21%, energy consumption 55kJ/mol CO 2 。
In the above technical solution of the present application, the above is only a preferred embodiment of the present application, and therefore, the patent scope of the present application is not limited thereto, and all the technical fields of the present application including the equivalent structural transformation made by the description of the present application or the direct/indirect application of the present application are included in the patent protection scope of the present application.
Claims (18)
1. A carbon capture agent, characterized in that the carbon capture agent is used for absorption and/or capture of carbon dioxide; the carbon capture agent comprises a deprotonated carboxyl group and a deprotonated amino group, and the deprotonated amino group comprises-NH 2 -NH, -N.
2. An amino acid-based carbon capture agent, characterized in that the carbon capture agent is used for absorption and/or capture of carbon dioxide;
the carbon trapping agent comprises amino acid and alkaline additive; alternatively, the carbon capture agent includes a product obtained by mixing the amino acid and the basic additive.
3. The carbon capture agent of claim 2, wherein the amino acid has a vapor pressure of not greater than 1.31kPa at room temperature.
4. The carbon capture agent of claim 2, wherein the amino acid comprises one or more of alanine, sarcosine, glycine, lysine, proline, glutamic acid, arginine, tryptophan, serine, threonine, lysine, histidine, valine, leucine, tyrosine, phenylalanine, glutamine;
and/or the alkaline additive comprises one or more of an alkaline hydroxide and an alkaline carbonic acid compound.
5. The carbon capture agent of claim 2, wherein the molar ratio of the amino acid to the basic additive is 0.2-8:1, a step of;
and/or the concentration of the amino acid is 0.2-8mol/L.
6. The carbon capture agent of claim 2, further comprising piperazine; the molar ratio of the amino acid to the piperazine is 0.2-8:1.
7. the carbon capture agent according to any one of claims 2 to 6, further comprising a supporting electrolyte.
8. A method for producing a carbon capture agent, characterized in that the carbon capture agent is used for absorption and/or capture of carbon dioxide; the preparation method comprises the following steps: mixing amino acid and alkaline additive to obtain the carbon trapping agent.
9. Use of a carbon capture agent according to any one of claims 1 to 7 or prepared according to claim 8 in carbon dioxide absorption and/or carbon dioxide capture.
10. The use according to claim 9, wherein the step of carbon dioxide absorption comprises: the carbon trapping agent is contacted with a gas to be treated containing carbon dioxide and is absorbed, so that carbon dioxide absorption liquid is obtained;
the step of carbon dioxide capture comprises:
the carbon trapping agent is contacted with a gas to be treated containing carbon dioxide and is absorbed, so that carbon dioxide absorption liquid is obtained;
and electrolyzing the carbon dioxide absorption liquid to desorb carbon dioxide in the carbon dioxide absorption liquid, so as to obtain a desorption liquid and desorbed carbon dioxide.
11. The use of claim 10, wherein the step of capturing carbon dioxide further comprises: electrolyzing the desorption solution to enable metal ions combined with the carbon trapping agent to be electrodeposited, so as to obtain the carbon trapping agent separated from the metal ions;
wherein the desorption liquid contains the carbon trapping agent, and the carbon trapping agent is combined with metal ions from an electrode.
12. A carbon dioxide absorbing device, characterized in that the carbon dioxide absorbing device has therein the carbon trapping agent according to any one of claims 1 to 7 or the carbon trapping agent produced according to claim 8.
13. A carbon dioxide capture system, characterized in that the carbon dioxide capture system comprises a carbon dioxide absorption device and a carbon dioxide desorption device;
the carbon dioxide absorbing device is provided with the carbon trapping agent according to any one of claims 1 to 7 or the carbon trapping agent prepared according to claim 8;
the carbon dioxide absorption device and the carbon dioxide desorption device are communicated, so that carbon dioxide absorption liquid generated in the carbon dioxide absorption device is conveyed to the carbon dioxide desorption device continuously or intermittently, and the carbon dioxide desorption device is provided with an electrolysis mechanism.
14. A carbon dioxide absorbing liquid, characterized in that the carbon dioxide absorbing liquid is used for desorption and/or capture of carbon dioxide;
the carbon dioxide absorbing liquid contains the carbon trapping agent according to any one of claims 1 to 7 or the carbon trapping agent prepared according to claim 8, and the carbon trapping agent is combined with carbon dioxide.
15. Use of a carbon dioxide absorption liquid according to claim 14 in carbon dioxide desorption and/or carbon dioxide capture.
16. The use according to claim 15, wherein the step of desorbing carbon dioxide comprises: electrolyzing the carbon dioxide absorption liquid to desorb carbon dioxide in the carbon dioxide absorption liquid;
the carbon dioxide capturing process comprises the following steps:
obtaining the carbon dioxide absorption liquid;
and electrolyzing the carbon dioxide absorption liquid to desorb the carbon dioxide in the carbon dioxide absorption liquid.
17. A carbon dioxide desorption apparatus, characterized in that the carbon dioxide absorption liquid according to claim 14 is provided in an anode chamber of the carbon dioxide desorption apparatus.
18. A carbon dioxide capture system, characterized in that the carbon dioxide capture system comprises a carbon dioxide absorption device and a carbon dioxide desorption device;
the carbon dioxide absorbing liquid according to claim 14 is provided in an anode chamber of the carbon dioxide desorption device;
the anode chamber of the carbon dioxide desorption device and the carbon dioxide absorption device are communicated and arranged to continuously or intermittently receive the carbon dioxide absorption liquid from the carbon dioxide absorption device.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310887561.7A CN116785890A (en) | 2023-07-19 | 2023-07-19 | Carbon trapping agent, absorption liquid, device, trapping system and application based on amino acid |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310887561.7A CN116785890A (en) | 2023-07-19 | 2023-07-19 | Carbon trapping agent, absorption liquid, device, trapping system and application based on amino acid |
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