CN118558111B - Carbon dioxide capture system, reactor and filler used therein - Google Patents
Carbon dioxide capture system, reactor and filler used therein Download PDFInfo
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- CN118558111B CN118558111B CN202410520046.XA CN202410520046A CN118558111B CN 118558111 B CN118558111 B CN 118558111B CN 202410520046 A CN202410520046 A CN 202410520046A CN 118558111 B CN118558111 B CN 118558111B
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 90
- 239000000945 filler Substances 0.000 title claims abstract description 59
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 45
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 45
- 239000006260 foam Substances 0.000 claims abstract description 76
- 239000007788 liquid Substances 0.000 claims abstract description 59
- 239000000243 solution Substances 0.000 claims abstract description 52
- 239000006262 metallic foam Substances 0.000 claims abstract description 43
- 150000003943 catecholamines Chemical class 0.000 claims abstract description 41
- 239000002105 nanoparticle Substances 0.000 claims abstract description 40
- 238000002156 mixing Methods 0.000 claims abstract description 33
- 239000002250 absorbent Substances 0.000 claims abstract description 23
- 230000002745 absorbent Effects 0.000 claims abstract description 23
- 239000006087 Silane Coupling Agent Substances 0.000 claims abstract description 16
- 238000000034 method Methods 0.000 claims abstract description 13
- 239000002904 solvent Substances 0.000 claims abstract description 13
- 239000007853 buffer solution Substances 0.000 claims abstract description 12
- 238000000926 separation method Methods 0.000 claims abstract description 12
- 150000001412 amines Chemical class 0.000 claims abstract description 9
- 150000004756 silanes Chemical class 0.000 claims abstract 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 34
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 31
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 18
- 239000011148 porous material Substances 0.000 claims description 18
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 14
- 239000002245 particle Substances 0.000 claims description 14
- 238000002360 preparation method Methods 0.000 claims description 13
- GLUUGHFHXGJENI-UHFFFAOYSA-N Piperazine Chemical compound C1CNCCN1 GLUUGHFHXGJENI-UHFFFAOYSA-N 0.000 claims description 11
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 9
- 238000005260 corrosion Methods 0.000 claims description 9
- 230000007797 corrosion Effects 0.000 claims description 9
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 9
- VYFYYTLLBUKUHU-UHFFFAOYSA-N dopamine Chemical compound NCCC1=CC=C(O)C(O)=C1 VYFYYTLLBUKUHU-UHFFFAOYSA-N 0.000 claims description 8
- WTDRDQBEARUVNC-LURJTMIESA-N L-DOPA Chemical compound OC(=O)[C@@H](N)CC1=CC=C(O)C(O)=C1 WTDRDQBEARUVNC-LURJTMIESA-N 0.000 claims description 7
- WTDRDQBEARUVNC-UHFFFAOYSA-N L-Dopa Natural products OC(=O)C(N)CC1=CC=C(O)C(O)=C1 WTDRDQBEARUVNC-UHFFFAOYSA-N 0.000 claims description 7
- 239000012190 activator Substances 0.000 claims description 7
- 239000010949 copper Substances 0.000 claims description 7
- 229960004502 levodopa Drugs 0.000 claims description 7
- 229910021645 metal ion Inorganic materials 0.000 claims description 7
- 229910052759 nickel Inorganic materials 0.000 claims description 7
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- KKYDYRWEUFJLER-UHFFFAOYSA-N 1,1,2,2,3,3,4,4,5,5,6,6,7,7,10,10,10-heptadecafluorodecyl(trimethoxy)silane Chemical compound CO[Si](OC)(OC)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)CCC(F)(F)F KKYDYRWEUFJLER-UHFFFAOYSA-N 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 229960003638 dopamine Drugs 0.000 claims description 4
- 239000003112 inhibitor Substances 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 239000007790 solid phase Substances 0.000 claims description 4
- YOCUPQPZWBBYIX-UHFFFAOYSA-N copper nickel Chemical compound [Ni].[Cu] YOCUPQPZWBBYIX-UHFFFAOYSA-N 0.000 claims description 3
- 150000003839 salts Chemical class 0.000 claims description 3
- PMQIWLWDLURJOE-UHFFFAOYSA-N triethoxy(1,1,2,2,3,3,4,4,5,5,6,6,7,7,10,10,10-heptadecafluorodecyl)silane Chemical compound CCO[Si](OCC)(OCC)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)CCC(F)(F)F PMQIWLWDLURJOE-UHFFFAOYSA-N 0.000 claims description 3
- SFLSHLFXELFNJZ-QMMMGPOBSA-N (-)-norepinephrine Chemical compound NC[C@H](O)C1=CC=C(O)C(O)=C1 SFLSHLFXELFNJZ-QMMMGPOBSA-N 0.000 claims description 2
- 239000007864 aqueous solution Substances 0.000 claims description 2
- 239000000872 buffer Substances 0.000 claims description 2
- 229910000420 cerium oxide Inorganic materials 0.000 claims description 2
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 239000005543 nano-size silicon particle Substances 0.000 claims description 2
- 229960002748 norepinephrine Drugs 0.000 claims description 2
- SFLSHLFXELFNJZ-UHFFFAOYSA-N norepinephrine Natural products NCC(O)C1=CC=C(O)C(O)=C1 SFLSHLFXELFNJZ-UHFFFAOYSA-N 0.000 claims description 2
- SOQBVABWOPYFQZ-UHFFFAOYSA-N oxygen(2-);titanium(4+) Chemical compound [O-2].[O-2].[Ti+4] SOQBVABWOPYFQZ-UHFFFAOYSA-N 0.000 claims description 2
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 claims description 2
- PVXVWWANJIWJOO-UHFFFAOYSA-N 1-(1,3-benzodioxol-5-yl)-N-ethylpropan-2-amine Chemical compound CCNC(C)CC1=CC=C2OCOC2=C1 PVXVWWANJIWJOO-UHFFFAOYSA-N 0.000 claims 3
- QMMZSJPSPRTHGB-UHFFFAOYSA-N MDEA Natural products CC(C)CCCCC=CCC=CC(O)=O QMMZSJPSPRTHGB-UHFFFAOYSA-N 0.000 claims 3
- LENZDBCJOHFCAS-UHFFFAOYSA-N tris Chemical group OCC(N)(CO)CO LENZDBCJOHFCAS-UHFFFAOYSA-N 0.000 claims 1
- 238000005187 foaming Methods 0.000 abstract description 17
- 239000007789 gas Substances 0.000 description 20
- 239000008367 deionised water Substances 0.000 description 12
- 229910021641 deionized water Inorganic materials 0.000 description 12
- 238000012986 modification Methods 0.000 description 12
- 230000004048 modification Effects 0.000 description 12
- 238000000576 coating method Methods 0.000 description 11
- 238000012546 transfer Methods 0.000 description 11
- 239000011248 coating agent Substances 0.000 description 10
- CRVGTESFCCXCTH-UHFFFAOYSA-N methyl diethanolamine Chemical compound OCCN(C)CCO CRVGTESFCCXCTH-UHFFFAOYSA-N 0.000 description 10
- 230000000052 comparative effect Effects 0.000 description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 8
- 229910052799 carbon Inorganic materials 0.000 description 8
- 235000019441 ethanol Nutrition 0.000 description 8
- 238000012856 packing Methods 0.000 description 7
- 238000009210 therapy by ultrasound Methods 0.000 description 7
- 238000001291 vacuum drying Methods 0.000 description 7
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 6
- 239000011737 fluorine Substances 0.000 description 6
- 229910052731 fluorine Inorganic materials 0.000 description 6
- 238000003756 stirring Methods 0.000 description 6
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 5
- 238000001035 drying Methods 0.000 description 5
- 238000005406 washing Methods 0.000 description 5
- 239000003513 alkali Substances 0.000 description 4
- 238000005262 decarbonization Methods 0.000 description 4
- 239000007791 liquid phase Substances 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- QKNYBSVHEMOAJP-UHFFFAOYSA-N 2-amino-2-(hydroxymethyl)propane-1,3-diol;hydron;chloride Chemical compound Cl.OCC(N)(CO)CO QKNYBSVHEMOAJP-UHFFFAOYSA-N 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
- 239000002518 antifoaming agent Substances 0.000 description 3
- 238000004090 dissolution Methods 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 238000011049 filling Methods 0.000 description 3
- 239000011259 mixed solution Substances 0.000 description 3
- 238000006116 polymerization reaction Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000000377 silicon dioxide Substances 0.000 description 3
- 235000012239 silicon dioxide Nutrition 0.000 description 3
- 239000000725 suspension Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000001132 ultrasonic dispersion Methods 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- -1 alcohol amine Chemical class 0.000 description 2
- ORTQZVOHEJQUHG-UHFFFAOYSA-L copper(II) chloride Chemical compound Cl[Cu]Cl ORTQZVOHEJQUHG-UHFFFAOYSA-L 0.000 description 2
- 238000000635 electron micrograph Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000011068 loading method Methods 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 239000012071 phase Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000009991 scouring Methods 0.000 description 2
- LPXPTNMVRIOKMN-UHFFFAOYSA-M sodium nitrite Chemical compound [Na+].[O-]N=O LPXPTNMVRIOKMN-UHFFFAOYSA-M 0.000 description 2
- 239000001488 sodium phosphate Substances 0.000 description 2
- 229910000162 sodium phosphate Inorganic materials 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- QLOKJRIVRGCVIM-UHFFFAOYSA-N 1-[(4-methylsulfanylphenyl)methyl]piperazine Chemical compound C1=CC(SC)=CC=C1CN1CCNCC1 QLOKJRIVRGCVIM-UHFFFAOYSA-N 0.000 description 1
- GIAFURWZWWWBQT-UHFFFAOYSA-N 2-(2-aminoethoxy)ethanol Chemical compound NCCOCCO GIAFURWZWWWBQT-UHFFFAOYSA-N 0.000 description 1
- OPKOKAMJFNKNAS-UHFFFAOYSA-N N-methylethanolamine Chemical compound CNCCO OPKOKAMJFNKNAS-UHFFFAOYSA-N 0.000 description 1
- 238000005273 aeration Methods 0.000 description 1
- 230000003254 anti-foaming effect Effects 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 239000000306 component Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 229960003280 cupric chloride Drugs 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- CWAFVXWRGIEBPL-UHFFFAOYSA-N ethoxysilane Chemical compound CCO[SiH3] CWAFVXWRGIEBPL-UHFFFAOYSA-N 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 229960002089 ferrous chloride Drugs 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 125000001153 fluoro group Chemical group F* 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- NMCUIPGRVMDVDB-UHFFFAOYSA-L iron dichloride Chemical compound Cl[Fe]Cl NMCUIPGRVMDVDB-UHFFFAOYSA-L 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- ARYZCSRUUPFYMY-UHFFFAOYSA-N methoxysilane Chemical compound CO[SiH3] ARYZCSRUUPFYMY-UHFFFAOYSA-N 0.000 description 1
- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 description 1
- 125000004193 piperazinyl group Chemical group 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 235000010288 sodium nitrite Nutrition 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- YUYCVXFAYWRXLS-UHFFFAOYSA-N trimethoxysilane Chemical compound CO[SiH](OC)OC YUYCVXFAYWRXLS-UHFFFAOYSA-N 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
- B01D53/18—Absorbing units; Liquid distributors therefor
-
- 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
- B01D53/1493—Selection of liquid materials for use as absorbents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/30—Loose or shaped packing elements, e.g. Raschig rings or Berl saddles, for pouring into the apparatus for mass or heat transfer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
- B01J8/02—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with stationary particles, e.g. in fixed beds
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J2219/30—Details relating to random packing elements
- B01J2219/304—Composition or microstructure of the elements
- B01J2219/30491—Foam like materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J2219/30—Details relating to random packing elements
- B01J2219/318—Manufacturing aspects
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Gas Separation By Absorption (AREA)
Abstract
本发明公开了一种二氧化碳捕集系统，其使用的反应器及填料，涉及二氧化碳捕集领域。其中，二氧化碳捕集系统包括：气体提供单元，用于提供含有待捕集二氧化碳的混合气；吸收剂提供单元，用于提供吸收剂；混合单元，用于混合所述混合气和吸收剂；微填充床反应器，其内填充有泡沫填料；泡沫填料的制备方法包括以下步骤：(1)提供金属泡沫；(2)将第一儿茶酚胺溶液与缓冲液混合，得到第一改性液；(3)将第一改性液、金属泡沫按照100～500体积份：1～10重量份的比例混合第一预设时间，固液分离得到第一中间体；(4)将无机纳米颗粒、溶剂、含氟硅烷偶联剂混合第二预设时间，得到第二改性液；(5)将第二改性液、第一中间体按照100～500体积份：1～10重量份的比例混合第三预设时间，即得到泡沫填料。本发明的二氧化碳捕集系统的捕集效率高，且胺液起泡少，消泡快。
The present invention discloses a carbon dioxide capture system, a reactor and a filler used therein, and relates to the field of carbon dioxide capture. The carbon dioxide capture system comprises: a gas supply unit for providing a mixed gas containing carbon dioxide to be captured; an absorbent supply unit for providing an absorbent; a mixing unit for mixing the mixed gas and the absorbent; a micro-packed bed reactor filled with a foam filler; and a method for preparing the foam filler comprising the following steps: (1) providing metal foam; (2) mixing a first catecholamine solution with a buffer solution to obtain a first modified liquid; (3) mixing the first modified liquid and the metal foam in a ratio of 100 to 500 parts by volume: 1 to 10 parts by weight for a first preset time, and performing solid-liquid separation to obtain a first intermediate; (4) mixing inorganic nanoparticles, a solvent, and a fluorinated silane coupling agent for a second preset time to obtain a second modified liquid; (5) mixing the second modified liquid and the first intermediate in a ratio of 100 to 500 parts by volume: 1 to 10 parts by weight for a third preset time to obtain the foam filler. The carbon dioxide capture system of the present invention has high capture efficiency, less foaming of the amine liquid and fast defoaming.
Description
Technical Field
The invention relates to the field of carbon dioxide trapping, in particular to a carbon dioxide trapping system, a reactor used by the carbon dioxide trapping system and a filler.
Background
The capturing and removing of carbon dioxide are core process links in a plurality of industrial fields, such as deacidification process in natural gas industry, decarbonization of coke oven gas, decarbonization of city gas, decarbonization of coal-fired flue gas, recovery of oilfield produced gas and the like. The realization of efficient carbon capture has important significance for reducing carbon emission and improving resource utilization efficiency. The existing carbon dioxide trapping technology comprises a physical adsorption method, a membrane separation method and a solvent absorption method, wherein the alcohol amine solvent absorption method mainly comprising N-Methyldiethanolamine (MDEA) has the advantages of low solution viscosity, low operation cost, high CO 2 capacity, low regeneration energy consumption and the like, and is widely adopted. However, the mixed solution mainly containing MDEA has the defect of easy foaming, and has strong foam stability, so that entrainment is caused, the amine liquid loss is increased, and the carbon trapping efficiency is reduced. In the prior art, the problem is solved by adding an antifoaming agent into the amine liquid, but one antifoaming agent can influence the running stability of the system and the solution blocks equipment, and the antifoaming agent are required to be added regularly, so that the operation is troublesome. Another way to solve the foaming problem is to use a compounded decarbonization agent, for example CN101822932B, i.e. a compounded activator (piperazine, N-methyl monoethanolamine and diglycolamine), which effectively improves the anti-foaming performance. Yet another common solution to the foaming problem is to enhance the filtration of the gas, amine liquid, to avoid introducing impurities, to initiate bubbles, or to make bubbles stable for too long.
On the other hand, the micro-packed bed reactor has the advantages of high mass transfer efficiency, high heat removal rate, plug flow and the like, and also has the advantages of easy fixation, continuous operation, intrinsic safety and the like of the catalytic packing of the traditional fixed bed reactor, and is considered to have great advantages in the field of carbon dioxide capturing. In a micro-packed bed, the micro-sized packing is the core component, wherein the micro-sized metal foam packing is one that is more applied. However, when the inventor applies the micro-packed bed reactor to the carbon trapping experiment, the micro-channel structure of the micro-sized metal foam filler can cause the foaming phenomenon of MDEA amine liquid to be more serious, but the mass transfer efficiency is lower than that of the traditional fixed bed reactor, and the theoretical prediction result is difficult to reach. The mass transfer and reaction strengthening strategies of the conventional micro-packed bed reactor mainly change the gas-liquid distribution structure of the reactor, reduce the pore size of the filler, increase the flow rate of fluid and the like, but the structure of the reactor is complicated, and the energy consumption is improved. Furthermore, the inventors found that the foaming phenomenon of the amine liquid is more serious after the pore size of the filler is further reduced.
Disclosure of Invention
The invention aims to solve the technical problem of providing a carbon dioxide trapping system which can effectively reduce amine liquid bubbles and improve carbon dioxide trapping efficiency.
The invention also solves the technical problem of providing a reactor for a carbon dioxide capturing system, which can improve the capturing efficiency of carbon dioxide.
The invention also solves the technical problem of providing a reactor filler for a carbon dioxide capturing system, which can improve the capturing efficiency of carbon dioxide.
In order to solve the above technical problems, as a first aspect of the present invention, there is provided a carbon dioxide capturing system comprising:
A gas supply unit for supplying a mixed gas containing carbon dioxide to be trapped;
an absorbent providing unit for providing an absorbent, the absorbent being an amine absorbent;
a mixing unit for mixing the mixture gas and the absorbent, and
A micro-packed bed reactor filled with a foam filler;
The preparation method of the foam filler comprises the following steps:
(1) Providing metal foam, wherein the average pore diameter of the metal foam is 50-800 mu m;
(2) Mixing a first catecholamine solution with a buffer solution to obtain a first modified solution, wherein the concentration of catecholamine in the first catecholamine solution is 0.5-5 g/L;
(3) Mixing the first modified liquid and the metal foam for a first preset time according to the proportion of 100-500 parts by volume and 1-10 parts by weight, and carrying out solid-liquid separation to obtain a first intermediate;
(4) Mixing inorganic nano particles, a solvent and a fluorine-containing silane coupling agent for a second preset time to obtain a second modified liquid, wherein the concentration of the inorganic nano particles in the second modified liquid is 1-10 g/L, the concentration of the fluorine-containing silane coupling agent is 0.2-2 vol%, and the maximum particle size of the inorganic nano particles is less than or equal to 500nm;
(5) And mixing the second modified liquid and the first intermediate for a third preset time according to the proportion of 100-500 parts by volume to 1-10 parts by weight, thus obtaining the foam filler.
On one hand, the micro-packed bed reactor is introduced into the carbon dioxide trapping system, so that the mass transfer efficiency is high, and the trapping efficiency of carbon dioxide can be effectively improved. In another aspect, the micro-packed bed reactor of the present invention uses a foam packing prepared by a specific preparation method. Through the preparation method, the hydrophobicity of the surface of the pore canal of the foam filler is greatly improved, the gas-liquid mass transfer performance is enhanced, meanwhile, the pore canal with stronger hydrophobicity can increase the liquid flow speed of a water film (namely a gas-liquid interface) on the surface of the foam, and the foam stability is reduced, so that the foaming is reduced, and the defoaming time is shortened. The inorganic nano particles with specific particle sizes are formed on the surfaces of the foam filler holes, so that disturbance on liquid flow distribution is improved, foam is easier to eliminate, and excessive nano particle accumulation can be prevented from affecting gas-liquid mass transfer performance by controlling the particle sizes of the inorganic nano particles. The method has the advantages that the mechanical stability of the whole coating is improved by adopting the mode of organically adhering the poly catecholamine substances and compounding the inorganic nano particle coating on the surfaces of the metal foam pore channels, and meanwhile, the acid and alkali resistance of the metal foam is improved, so that the metal foam pore channel is applicable to various carbon trapping scenes, and particularly, the carbon trapping system disclosed by the invention can be applicable to the absorption treatment of carbon dioxide in gases such as flue gas, refinery gas, natural gas, synthesis gas, conversion gas and the like.
In the present invention, the relation between parts by weight and parts by volume is g/mL, or the relation obtained by scaling up or down the relation in equal proportions, for example, mg/μ L, kg/L, t/m 3, but the present invention is not limited thereto.
Specifically, in some embodiments of the present invention, the metal foam is selected from one or more of nickel foam, iron foam, nickel copper foam, and copper foam, but is not limited thereto. Preferably, the metal foam is nickel foam or nickel copper foam, and has strong corrosion resistance and strong corrosion resistance for the carbon dioxide-containing mixed gas.
Specifically, in some embodiments of the present invention, the average pore size of the metal foam is 50-800 μm. Preferably, the average pore diameter of the metal foam is 100 to 500 μm.
Specifically, in some embodiments of the invention, the catecholamine is selected from one or more of dopamine, levodopa and norepinephrine, and the catecholamine solution is mixed with the buffer solution to form the poly catecholamine, so that the adhesion of inorganic nano particles to metal foam is greatly improved, the inorganic nano particles are prevented from being scattered into the amine solution under high operating pressure, the inorganic nano particles are prevented from prolonging the foam breaking time, and the defoaming time is prolonged. Preferably, the catecholamine is selected from dopamine or levodopa.
Specifically, in some embodiments of the present invention, the concentration of catecholamine in the first catecholamine solution is 0.5 to 5g/L, preferably 0.5 to 4g/L.
Specifically, in some embodiments of the present invention, the buffer solution is a tris (hydroxymethyl) aminomethane hydrochloride solution or a sodium hydroxide solution, specifically, the concentration of the tris (hydroxymethyl) aminomethane hydrochloride solution is 0.1-1 mol/L, the concentration of the sodium hydroxide solution is 0.1-1 mol/L, and the volume ratio of the buffer solution to the first catecholamine solution is 0.1-1.5:100.
Specifically, in some embodiments of the present invention, the first predetermined time is 5 to 50 hours, and the buffer solution and the first catecholamine solution are mixed at room temperature (10 to 35 ℃).
Specifically, in some embodiments of the present invention, the inorganic nanoparticles are selected from one or more of nano silica, nano gamma-alumina, nano cerium oxide, or nano titanium dioxide, but are not limited thereto. Preferably, the inorganic nano particles are nano silicon dioxide or nano gamma-alumina.
Specifically, in some embodiments of the present invention, the maximum particle size of the inorganic nanoparticles is less than or equal to 500nm, preferably, the particle size is 5 to 300nm.
Specifically, in some embodiments of the present invention, the concentration of the inorganic nanoparticles in the second modifying liquid is 1 to 10g/L, preferably 1 to 5g/L.
Specifically, in some embodiments of the present invention, the solvent is selected from one or more of water, methanol, ethanol, and propanol, but is not limited thereto.
Specifically, in some embodiments of the present invention, the silane coupling agent is a fluorine-containing methoxy silane coupling agent or a fluorine-containing ethoxy silane coupling agent, which not only can effectively improve the hydrophobic property of the inorganic nanoparticles, but also can realize stable connection with the catecholamine. Specifically, the silane coupling agent may be one or more of heptadecafluorodecyl trimethoxysilane, heptadecafluorodecyl triethoxysilane, or tridedecafluorooctyl trimethoxysilane, but is not limited thereto.
Specifically, in some embodiments of the present invention, the concentration of the fluorine-containing silane coupling agent in the second modifying liquid is 0.2 to 2vol%, preferably 1 to 2vol%.
Specifically, in some embodiments of the present invention, the second preset time is 0.5 to 5 hours, preferably 1 to 4 hours. The mixing temperature is room temperature (10-35 ℃).
Specifically, in some embodiments of the present invention, the third preset time is 1 to 12 hours, preferably 1 to 10 hours. The mixing temperature is room temperature (10-35 ℃).
Preferably, in some embodiments of the present invention, the metal foam is nickel foam, which has high corrosion resistance.
Preferably, in some embodiments of the present invention, the catecholamine is levodopa, which can further enhance the adhesion of inorganic nanoparticles, and optimize the acid-base corrosion resistance of the metal foam.
Preferably, in some embodiments of the invention, the buffer is sodium hydroxide solution.
Preferably, in some embodiments of the present invention, the inorganic nanoparticles are selected from nano gamma-alumina.
Preferably, in some embodiments of the present invention, the solvent is a mixture of water and ethanol, and the volume ratio of water to ethanol is 2-4:1, and based on the solvent, the dispersion of the inorganic nanoparticles in the second modified liquid can be improved, and a good basis is provided for uniform loading.
Preferably, in some embodiments of the present invention, the silane coupling agent is heptadecafluorodecyl trimethoxysilane.
Preferably, in some embodiments of the present invention, the metal foam has an average pore size of 150 to 300 μm and the inorganic nanoparticles have an average particle size of 10 to 200nm. Based on the metal foam and the inorganic nano particles, the foaming possibility can be further reduced, and the defoaming time can be shortened.
Preferably, in some embodiments of the present invention, in step (1), the metal foam is sequentially washed with water, ethanol, hydrochloric acid and water to remove impurities attached to the inside of the pores of the metal foam, so as to optimize adhesion of subsequent poly catecholamine and inorganic nanoparticles.
Preferably, in some embodiments of the present invention, the concentration of catecholamine in the first catecholamine solution is 1.5-3 g/L, the volume ratio of the buffer solution to the first catecholamine solution is 0.3-1:100, and the adhesion performance of the inorganic nanoparticles can be further optimized based on the concentration and the ratio control.
Preferably, in some embodiments of the present invention, in the step (3), the first modification solution and the metal foam are mixed according to a proportion of 200 to 400 parts by volume, 4 to 9 parts by weight, and are stirred and immersed for 6 to 48 hours at a rotation speed of 300 to 900rpm, and the solid phase obtained after solid-liquid separation is washed with water and dried, so as to obtain the first intermediate.
Preferably, in some embodiments of the present invention, in the step (4), the inorganic nanoparticles and the solvent are mixed for 1to 2 hours at 500 to 900rpm, and after ultrasonic dispersion for 0.5 to 1 hour, the silane coupling agent is added, and mixed for 10 to 30 minutes at 500 to 900rpm, so as to obtain the second modified liquid;
preferably, in some embodiments of the present invention, in step (5), the second modification solution and the first intermediate are mixed according to a proportion of 200 to 400 parts by volume to 2 to 7 parts by weight, grafting is performed for 2 to 10 hours at a rotation speed of 300 to 700rpm, and the solid phase obtained after solid-liquid separation is washed with water and dried, so as to obtain the foam filler.
Preferably, in one embodiment of the present invention, step (3) includes:
(3.1) mixing the first modified liquid and the metal foam for a first preset time according to the proportion of 100-500 parts by volume and 1-10 parts by weight, and carrying out solid-liquid separation to obtain a second intermediate;
(3.2) mixing the second catecholamine solution with a metal salt to obtain a third modified solution;
and (3.3) mixing the third modified liquid and the second intermediate according to the proportion of 100-500 parts by volume to 1-10 parts by weight, carrying out ultrasonic treatment for a fourth preset time, and carrying out solid-liquid separation to obtain the first intermediate.
It should be noted that, in the research process, the inventor finds that when the first modifying solution is only adopted to load the catecholamine on the surface of the metal foam, the phenomenon that the surface is partially agglomerated easily occurs (refer to fig. 4), and through the analysis of the inventor, the catecholamine is not completely polymerized in the buffer solution, and partial oligomers exist, and the oligomers are agglomerated on the surface of the mesh of the metal foam mesh, so that the homogenization degree of the inorganic nano particles loaded subsequently is reduced, the catecholamine layer cannot be completely protected, the acid and alkali resistance and the scouring resistance of the foam filler are reduced, and the service life of the foam filler is shortened. Therefore, in a preferred embodiment of the present invention, the metal foam is dip-coated with a first modifying solution obtained by mixing a first catecholamine solution with a buffer solution, then mixed with a third modifying solution obtained by mixing a second catecholamine solution and a metal salt, and subjected to ultrasonic treatment, so that the oligomer is separated from the surface of the metal foam under the ultrasonic action, and the polymerization is rapidly realized under the action of metal ions. By the coating method, the loading uniformity degree of the poly catecholamine layer is effectively improved (figure 3), so that the acid-alkali resistance and scouring resistance of the foam filler are effectively improved.
Specifically, in the step (3.2), one or more of Fe 2+、Fe3 +、Cu2+、Zn2+ is selected as the metal ion, and the above metal ions can rapidly promote the polymerization of catecholamine oligomer to form high polymer. Preferably, in an embodiment of the present invention, the metal ion is a mixture of Fe 2+ and Cu 2+, and the molar ratio of the two is 1:1-2.
Specifically, in some embodiments of the present invention, in step (3.2), the concentration of the metal ion is 5×10 -4～1×10-2 mol/L, preferably 5×10 -3～1×10-2 mol/L, by which the oligomer polymerization can be effectively promoted.
Specifically, in some embodiments of the present invention, the concentration of catecholamine in the second catecholamine solution is 0.05 to 0.5g/L, preferably 0.05 to 0.1g/L.
Specifically, in some embodiments of the present invention, the fourth preset time is 0.5 to 8 hours, preferably 1 to 6 hours. The mixing temperature is room temperature (10-35 ℃). Preferably, in some embodiments of the invention, the absorbent is an aqueous solution containing MDEA with an MDEA content of greater than or equal to 35wt% and an activator content of greater than or equal to 3.5wt%. Wherein the activator is piperazine, but not limited thereto. The foam filler effectively reduces the foaming height, so that the contents of MDEA and an activator in the absorbent are further improved, and the carbon capturing efficiency is further improved. In the conventional MDEA-based absorbent, the MDEA content is generally controlled to be not more than 32wt% and the activator content is controlled to be not more than 3wt% so as to reduce the foaming height.
Preferably, in some embodiments of the invention, the absorbent comprises, by weight, 35-45% of MDEA, 4-10% of piperazine, 0.5-5% of corrosion inhibitor, and the balance of water. Because the dosage of the piperazine as the activator is higher, the corrosion effect of the whole absorbent on the metal foam filler and the micro-packed bed reactor is stronger, and therefore, the invention also introduces 0.5-5% of corrosion inhibitor. Specifically, the corrosion inhibitor may be sodium phosphate, potassium chromate, sodium nitrite, but is not limited thereto.
Specifically, in some embodiments of the present invention, the micro-packed bed is cylindrical, has an inner diameter of 5-20 mm, a length of 10-30 cm, and an aspect ratio of 30 or more.
Correspondingly, the invention also discloses a reactor for the carbon dioxide trapping system, which is a micro-packed bed reactor, wherein foam filler is arranged in the micro-packed bed reactor, and the foam filler is prepared by the preparation method of the foam filler.
Correspondingly, the invention also discloses a reactor filler for the carbon dioxide trapping system, which is prepared by the preparation method of the foam filler.
The implementation of the invention has the following beneficial effects:
The micro-packed bed reactor is introduced into the carbon dioxide trapping system, so that the mass transfer efficiency is high, and the trapping efficiency of carbon dioxide can be effectively improved. In another aspect, the micro-packed bed reactor of the present invention uses a foam packing prepared by a specific preparation method. Specifically, the invention sequentially adopts a first catecholamine solution and a buffer solution to mix to obtain a first modified solution, and a second modified solution obtained by mixing inorganic nano particles, a solvent and a fluorine-containing silane coupling agent is used for modifying metal foam. Based on the foam filler prepared by the preparation method, the hydrophobicity of the surface of the pore canal of the foam filler is greatly improved, the gas-liquid mass transfer performance is enhanced, and meanwhile, the pore canal with stronger hydrophobicity can increase the liquid flow speed of a water film (namely a gas-liquid interface) on the surface of the foam, reduce the foam stability, thereby reducing foaming and shortening the foaming time. The inorganic nano particles with specific particle sizes are formed on the surfaces of the foam filler holes, so that disturbance on liquid flow distribution is improved, foam is easier to eliminate, and excessive nano particle accumulation can be prevented from affecting gas-liquid mass transfer performance by controlling the particle sizes of the inorganic nano particles. The catecholamine substance organic adhesion and the inorganic nanoparticle coating are combined on the surfaces of the metal foam pore channels, so that the mechanical stability of the whole coating is improved, and meanwhile, the acid and alkali resistance of the metal foam is improved, so that the metal foam is applicable to various carbon trapping scenes.
Drawings
FIG. 1 is an electron microscopic view of the inner surface of the cell channel of the foam filler prepared in example 2;
FIG. 2 is an electron microscopic view of the inner surface of the cell of the foam filler of comparative example 1.
FIG. 3 is an electron micrograph of a first intermediate after step (5) of example 1 of the present invention;
FIG. 4 is an electron micrograph of the first intermediate after step (3) of example 2 of the present invention.
Detailed Description
The present invention will be further described with reference to the drawings and the specific embodiments thereof in order to make the objects, technical solutions and advantages of the present invention more apparent.
Example 1 preparation of foam Filler
(1) Sequentially placing metal foam nickel (average pore diameter of 155 μm) in deionized water, absolute ethyl alcohol and 0.2M HCl, performing ultrasonic treatment at 40kHz for 30min, then placing in deionized water, performing ultrasonic treatment at 40kHz for 20min, and finally placing in a vacuum drying oven at 80 ℃ for 4h;
(2) Dissolving 0.4g of dopamine into 200mL of deionized water, and adding 1.6mL of tris (hydroxymethyl) aminomethane hydrochloric acid solution (0.5 mol/L) after dissolution is completed to obtain a first modified solution;
(3) Adding 4.5g of the metal foam nickel obtained in the step (1) into the first modified liquid obtained in the step (2), stirring and coating for 20 hours at 600rpm, washing with deionized water after coating, and finally placing in a 60 ℃ vacuum drying oven, and drying for 8 hours to obtain a second intermediate;
(4) Dissolving 0.04g of levodopa into 200mL of deionized water, adding ferrous chloride and cupric chloride after dissolution, controlling the concentration of Cu 2+、Fe2+ to be 5 multiplied by 10 -3 mol/L and 3 multiplied by 10 -3 mol/L respectively, and uniformly mixing to obtain a third modified liquid;
(5) Uniformly mixing the second intermediate obtained in the step (3) and the third modified liquid obtained in the step (4), carrying out ultrasonic treatment for 30min, stirring and coating for 5h, washing with deionized water after coating, and finally placing in a 60 ℃ vacuum drying oven, and drying for 8h to obtain a first intermediate;
(6) Adding 0.5g of gamma-alumina particles with the average particle diameter of 100nm into 250mL of ethanol/water mixed solution, stirring for 1h at a rotating speed of 500rpm, and then performing ultrasonic dispersion for 1h to obtain a stable gamma-alumina nanoparticle suspension, adding 2mL of heptadecafluorodecyl triethoxysilane into the gamma-alumina nanoparticle suspension, and stirring for 20min at a rotating speed of 700rpm to obtain a second modified liquid;
(7) And (3) adding the first intermediate obtained in the step (5) into the second modification solution obtained in the step (6), performing grafting modification at 300rpm for 6 hours, washing with deionized water after modification, and finally placing in a vacuum drying oven at 80 ℃ and drying for 6 hours to obtain a foam filler finished product.
Example 2 preparation of foam Filler
(1) Sequentially placing metal copper foam (average pore diameter of 205 μm) in deionized water, absolute ethyl alcohol and 0.2M HCl, performing ultrasonic treatment at 40kHz for 30min, then placing in deionized water, performing ultrasonic treatment at 40kHz for 20min, and finally placing in a vacuum drying oven at 80 ℃ for 4h;
(2) Dissolving 0.4g of levodopa into 200mL of deionized water, and adding 2.4mL of NaOH solution (0.8 mmol/L) after dissolution is completed to obtain a first modified liquid;
(3) Adding 6.5g of the metal copper foam obtained in the step (1) into the first modified liquid obtained in the step (2), stirring and coating for 24 hours at 300rpm, washing with deionized water after coating, and finally placing in a 60 ℃ vacuum drying oven, and drying for 8 hours to obtain a first intermediate;
(4) Adding 1g of silicon dioxide particles with the average particle size of 20nm into 400mL of ethanol/water mixed solution, stirring for 1h at the rotating speed of 700rpm with the volume ratio of ethanol to water being 4:1, and then performing ultrasonic dispersion for 0.5h to obtain stable silicon dioxide nanoparticle suspension;
(5) And (3) adding the first intermediate obtained in the step (3) into the second modification solution obtained in the step (4), performing grafting modification at 300rpm for 6 hours, washing with deionized water after modification, and finally placing in a vacuum drying oven at 80 ℃ and drying for 6 hours to obtain a foam filler finished product.
Comparative example 1
The comparative example provides a method for preparing a foam filler, which is different from the method in the embodiment 2 in that the method does not comprise the steps (2) - (5).
Comparative example 2
The comparative example provides a preparation method of foam filler, which is different from example 2 in that the preparation method does not comprise steps (4) - (5), namely, the first intermediate is not subjected to the second modification liquid grafting modification.
Comparative example 3
The comparative example provides a preparation method of foam filler for micro-packed bed reactor, which is different from example 2 in that steps (2) - (3) are not included, namely, the cleaned metal foam is directly coated by adopting a second modifying liquid.
Example 3 carbon dioxide Capture System
The present embodiment provides a carbon dioxide capture system, including:
the gas supply unit comprises a raw material gas cylinder and a gas phase branch, and consists of the raw material gas cylinder, a mass flow controller and a gas phase pressure sensor. For introducing a mixed gas (17 vol% CO 2/83vol％N2 mixed gas) and controlling the flow rate of the mixed gas to be 100-300 sccm.
The absorbent providing unit comprises a liquid phase material bottle, a plunger pump and a liquid phase pressure sensor. The absorbent is used for being introduced, wherein the absorbent comprises the following components in percentage by weight of MDEA 42%, piperazine 8.5%, sodium phosphate 1.2% and the balance of water. The flow is controlled to be 1-25 mL/min, the liquid phase flow is controlled by a plunger pump, the pressure sensor is used for measuring the liquid phase pressure drop, and the paperless recorder is used for displaying the numerical value.
A mixing unit which is a T-type mixer;
A micro-packed bed reactor, the interior of which is filled with foam packing. Wherein the micro-packed bed reactor is cylindrical, has an inner diameter of 6mm and a length of 20cm, and is filled with 40 blocks of foam filler (the foam filler is cylindrical, has a length of 5mm and a diameter of 6 mm).
In order to evaluate foaming, a micro packed bed reactor (cylindrical, 20cm in length, 6mm in inner diameter) made of transparent glass was used in the foaming test, and the outer wall thereof was marked with graduations, and 16 foam fillers (cylindrical foam fillers having a length of 5mm and a diameter of 6 mm) having a length of 5mm were packed.
The foam fillers obtained in examples 1 to 2 and comparative examples 1 to 3 were tested according to the following specific test scheme:
(1) Testing the contact angle;
(2) Filling foam filler into the micro-packed bed reactor in example 3 (complete filling), reacting aeration liquid, and calculating mass transfer coefficient, energy efficiency and carbon dioxide removal rate (reaction 50 s);
(3) And (3) evaluating foaming condition, namely filling foam filler into the glass micro-filled bed reactor (the filler height is 80 mm) in the embodiment 3, carrying out ventilation reaction, timing after the gas speed is stabilized, recording the foam height after the foam height is stabilized, stopping ventilation, and obtaining the time for the foam to collapse and see clear liquid as defoaming time.
(4) Stability evaluation the foam fillers obtained in the examples and comparative examples were immersed in HCl solution at ph=5.5 for 24 hours, and then evaluated for foaming.
Specific experimental data are shown in the following table:
From the table, the foam filler provided by the invention can effectively improve the contact angle of the foam filler, promote the unit removal rate of carbon dioxide in the carbon dioxide removal reaction, and improve the mass transfer coefficient and the energy efficiency. Meanwhile, the foaming height is low, and the defoaming time is shortened.
While the foregoing is directed to the preferred embodiments of the present invention, it will be appreciated by those skilled in the art that changes and modifications may be made without departing from the principles of the invention, such changes and modifications are also intended to be within the scope of the invention.
Claims (10)
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| CN108465461A (en) * | 2018-03-26 | 2018-08-31 | 江苏奥净嘉环保科技有限公司 | A kind of preparation method of photocatalysis air-cleaning material |
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| CN109420412A (en) * | 2017-08-23 | 2019-03-05 | 中国石油化工股份有限公司 | A kind of phase transformation organic amine absorbent |
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| CN108465461A (en) * | 2018-03-26 | 2018-08-31 | 江苏奥净嘉环保科技有限公司 | A kind of preparation method of photocatalysis air-cleaning material |
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