Process for separating carbon dioxide from flue gas using sweep-based membrane separation and absorption steps
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B01D-053/22
출원번호
US-0123342
(2010-09-13)
등록번호
US-8246718
(2012-08-21)
국제출원번호
PCT/US2010/002481
(2010-09-13)
§371/§102 date
20110408
(20110408)
국제공개번호
WO2012/036652
(2012-03-22)
발명자
/ 주소
Wijmans, Johannes G.
Baker, Richard W.
Merkel, Timothy C.
출원인 / 주소
Membrane Technology and Research, Inc
대리인 / 주소
Bean, K
인용정보
피인용 횟수 :
8인용 특허 :
14
초록▼
A gas separation process for treating flue gases from combustion processes, and combustion processes including such gas separation. The invention involves routing a first portion of the flue gas stream to be treated to an absorption-based carbon dioxide capture step, while simultaneously flowing a s
A gas separation process for treating flue gases from combustion processes, and combustion processes including such gas separation. The invention involves routing a first portion of the flue gas stream to be treated to an absorption-based carbon dioxide capture step, while simultaneously flowing a second portion of the flue gas across the feed side of a membrane, flowing a sweep gas stream, usually air, across the permeate side, then passing the permeate/sweep gas to the combustor.
대표청구항▼
1. A process for controlling carbon dioxide exhaust from a combustion process, comprising: (a) performing a combustion process by combusting a mixture of a fuel and air, oxygen-enriched air, or oxygen, thereby creating an exhaust stream comprising carbon dioxide and nitrogen;(b) performing an absorp
1. A process for controlling carbon dioxide exhaust from a combustion process, comprising: (a) performing a combustion process by combusting a mixture of a fuel and air, oxygen-enriched air, or oxygen, thereby creating an exhaust stream comprising carbon dioxide and nitrogen;(b) performing an absorption step to remove a portion of carbon dioxide in concentrated form from a first portion of the exhaust stream, thereby creating an off-gas stream from the capture step that is less concentrated in carbon dioxide than the exhaust stream;(c) providing a membrane having a feed side and a permeate side, and being selectively permeable to carbon dioxide over nitrogen and to carbon dioxide over oxygen;(d) passing a second portion of the exhaust stream across the feed side;(e) passing air, oxygen-enriched air or oxygen as a sweep stream across the permeate side;(f) withdrawing from the feed side a carbon-dioxide depleted vent stream;(g) withdrawing from the permeate side a permeate stream comprising oxygen and carbon dioxide;(h) passing the permeate stream to step (a) as at least part of the air, oxygen-enriched air, or oxygen used in step (a). 2. The process of claim 1, wherein the exhaust stream comprises flue gas from a coal-fired power plant. 3. The process of claim 1, wherein the exhaust stream comprises flue gas from a gas-fired power plant. 4. The process of claim 1, wherein the exhaust stream comprises at least 20 vol % CO2. 5. The process of claim 4, wherein the exhaust stream comprises at least 25 vol % CO2. 6. The process of claim 1, wherein, the exhaust stream comprises at least 3 vol % oxygen. 7. The process of claim 1, wherein the first portion of the exhaust stream comprises between about 10 vol % and about 75 vol % of the exhaust stream. 8. The process of claim 7, wherein the first portion of the exhaust stream comprises between about 20 vol % and about 65 vol % of the exhaust stream. 9. The process of claim 1, wherein the second portion of the exhaust stream is compressed to a pressure of up to about 5 bar before being passed across the feed side of the membrane. 10. The process of claim 1, wherein the exhaust stream is compressed prior to steps (b) and (d). 11. The process of claim 1, wherein the membrane exhibits a carbon dioxide permeance of at least 500 gpu under process operating conditions. 12. The process of claim 1, wherein the membrane exhibits a selectivity in favor of carbon dioxide over nitrogen of at least 10 under process operating conditions. 13. The process of claim 1, wherein the vent stream comprises 3 vol % carbon dioxide or less. 14. The process of claim 13, wherein the vent stream comprises 2 vol % carbon dioxide or less. 15. The process of claim 1, wherein the membrane comprises two or more membranes, and the two or more membranes are arranged in one or more modules, and wherein the one or more modules are arranged in a vertical configuration. 16. The process of claim 1, wherein the absorption step comprises a chemical absorption process. 17. The process of claim 16, wherein the chemical absorption process is amine scrubbing. 18. The process of claim 16, wherein the absorption step comprises absorption using a reagent comprising ammonia. 19. The process of claim 1, wherein the absorption step comprises a physical absorption process. 20. The process of claim 1, wherein the absorption step comprises an activated hot potassium carbonate process.
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이 특허에 인용된 특허 (14)
Kang, Ki Joon; Lee, Young Bong; Kim, Kwang Hyun; Kim, Je Young, Apparatus and method for recovering carbon dioxide from flue gas using ammonia water.
Wijmans, Johannes G.; Merkel, Timothy C; Baker, Richard W., Combustion systems and power plants incorporating parallel carbon dioxide capture and sweep-based membrane separation units to remove carbon dioxide from combustion gases.
Reddy Damoder (San Ramon CA) Moon Tag Y. (Worthington OH) Reineke ; deceased Charles E. (lat of Midland MI by Marian F. Reinecke ; legal representative), Counter current dual-flow spiral wound dual-pipe membrane separation.
Baker, Richard W; Wijmans, Johannes G; Merkel, Timothy C; Lin, Haiqing; Daniels, Ramin; Thompson, Scott, Gas separation process using membranes with permeate sweep to remove CO.
Friesen Dwayne T. (Bend OR) Newbold David D. (Bend OR) McCray Scott B. (Bend OR) Ray Roderick J. (Bend OR), Membrane dehydration of vaporous feeds by countercurrent condensable sweep.
Thaler Warren A. (Aberdeen NJ) Sartori Guido (Linden NJ) Kim Chang J. (Somerset NJ), Process for removing acid gases using a basic salt activated with a diaminoalcohol.
Wijmans, Johannes G.; Merkel, Timothy C.; Baker, Richard W., Process for separating carbon dioxide from flue gas using parallel carbon dioxide capture and sweep-based membrane separation steps.
Nazarko, Jewgeni; Riensche, Ernst; Bram, Martin; Zhao, Li, Apparatus and method for removing carbon dioxide (CO2) from the flue gas of a furnace after the energy conversion.
Baker, Richard W; Merkel, Timothy C; Wijmans, Johannes G, Gas separation process using membranes with permeate sweep to remove CO2 from combustion exhaust.
Baker, Richard W.; Wei, Xiaotong; Merkel, Timothy C, Hybrid parallel / serial process for carbon dioxide capture from combustion exhaust gas using a sweep-based membrane separation step.
Wei, Xiaotong; Baker, Richard W; Merkel, Timothy C; Freeman, Brice C., Sweep-based membrane gas separation integrated with gas-fired power production and CO2 recovery.
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