Power generation process with partial recycle of carbon dioxide
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F02C-001/00
F02C-003/00
F02G-001/00
F02G-003/00
출원번호
US-0115726
(2011-05-25)
등록번호
US-8220248
(2012-07-17)
우선권정보
WO-PCT/US2010/002480 (2010-09-13)
발명자
/ 주소
Wijmans, Johannes G.
Merkel, Timothy C.
Baker, Richard W.
Wei, Xiaotong
출원인 / 주소
Membrane Technology and Research, Inc
대리인 / 주소
Bean, K.
인용정보
피인용 횟수 :
73인용 특허 :
11
초록▼
Disclosed herein is a power generation process in which a portion of the carbon dioxide generated by gaseous fuel combustion is recycled back to the power generation process, either pre-combustion, post-combustion, or both. The power generation process of the invention may be a combined cycle proces
Disclosed herein is a power generation process in which a portion of the carbon dioxide generated by gaseous fuel combustion is recycled back to the power generation process, either pre-combustion, post-combustion, or both. The power generation process of the invention may be a combined cycle process or a traditional power generation process. The process utilizes sweep-based membrane separation.
대표청구항▼
1. A process for controlling carbon dioxide exhaust from combustion of a gaseous fuel, comprising: (a) performing a power generation process, comprising (i) performing a combustion step by combusting a mixture comprising a gaseous fuel and an oxygen-containing gas, thereby generating a combustor exh
1. A process for controlling carbon dioxide exhaust from combustion of a gaseous fuel, comprising: (a) performing a power generation process, comprising (i) performing a combustion step by combusting a mixture comprising a gaseous fuel and an oxygen-containing gas, thereby generating a combustor exhaust stream comprising carbon dioxide and nitrogen, and(ii) routing the combustor exhaust stream as at least a portion of a working gas stream to a gas turbine, thereby generating electrical power and creating a turbine exhaust stream;(b) routing a first portion of the turbine exhaust stream back to the power generation process as a recycle gas stream;(c) routing a second portion of the turbine exhaust stream to a membrane-based carbon dioxide capture step, wherein the capture step comprises (i) providing a first membrane having a first feed side and a first permeate side, and being selectively permeable to carbon dioxide over nitrogen and to carbon dioxide over oxygen,(ii) passing the second portion of the turbine exhaust stream across the first feed side,(iii) withdrawing from the first permeate side a partially concentrated carbon dioxide product stream,(iv) withdrawing from the first feed side a carbon dioxide-depleted stream(d) routing the carbon dioxide-depleted stream to a sweep-based membrane separation step, wherein the sweep-based membrane separation step comprises (i) providing a second membrane having a second feed side and a second permeate side, and being selectively permeable to carbon dioxide over nitrogen and to carbon dioxide over oxygen,(ii) passing a feed gas comprising the carbon dioxide-depleted stream across the second feed side,(iii) passing air, oxygen-enriched air, or oxygen as a sweep stream across the second permeate side,(iv) withdrawing from the second feed side a stream that is depleted in carbon dioxide compared to the feed gas,(v) withdrawing from the second permeate side a permeate stream comprising oxygen and carbon dioxide; and(e) passing the permeate stream back to the power generation process. 2. The process of claim 1, wherein at least a portion of the recycle gas stream is routed back to the power generation process after the combustion step, as part of the working gas stream to the gas turbine. 3. The process of claim 1, wherein at least a portion of the recycle gas stream is routed back to the power generation process prior to the combustion step, as part of the oxygen-containing gas provided to the combustion step. 4. The process of claim 1, wherein at least a portion of the permeate stream is routed back to the power generation process after the combustion step, as part of the working gas stream to the gas turbine. 5. The process of claim 1, wherein at least a portion of the permeate stream is routed back to the power generation process prior to the combustion step, as part of the oxygen-containing gas provided to the combustion step. 6. The process of claim 1, wherein the oxygen-containing gas provided to the combustion step comprises at least 15 volume % oxygen. 7. The process of claim 1, wherein the combustor exhaust stream comprises at least 2 volume % oxygen. 8. The process of claim 1, wherein the process recovers at least 80 volume % of the carbon dioxide generated by the combustion step into the partially concentrated carbon dioxide product stream. 9. The process of claim 1, wherein the partially concentrated carbon dioxide product stream contains at least 20 volume % carbon dioxide. 10. The process of claim 1, wherein the first membrane and the second membrane exhibit a selectivity for carbon dioxide over oxygen of at least 10. 11. A process for controlling carbon dioxide exhaust from combustion of a gaseous fuel, comprising: (a) performing a combined cycle power generation process, comprising (i) performing a combustion step by combusting a mixture comprising a gaseous fuel and an oxygen-containing gas, thereby generating a combustor exhaust stream comprising carbon dioxide and nitrogen,(ii) routing the combustor exhaust stream as at least a portion of a working gas stream to a gas turbine, thereby generating electrical power and creating a turbine exhaust stream,(iii) routing at least a portion of the turbine exhaust stream to a boiler, thereby generating steam and a creating a boiler exhaust stream, and(iv) routing the steam to a steam turbine, thereby generating additional electrical power;(b) routing a first portion of the boiler exhaust stream back to the power generation process as a recycle gas stream;(c) routing a second portion of the boiler exhaust stream to a membrane-based carbon dioxide capture step, wherein the capture step comprises (i) providing a first membrane having a first feed side and a first permeate side, and being selectively permeable to carbon dioxide over nitrogen and to carbon dioxide over oxygen,(ii) passing the second portion of the boiler exhaust stream across the first feed side,(iii) withdrawing from the first permeate side a partially concentrated carbon dioxide product stream,(iv) withdrawing from the first feed side a carbon dioxide-depleted stream(d) routing the carbon dioxide-depleted stream to a sweep-based membrane separation step, wherein the sweep-based membrane separation step comprises (i) providing a second membrane having a second feed side and a second permeate side, and being selectively permeable to carbon dioxide over nitrogen and to carbon dioxide over oxygen,(ii) passing a feed gas comprising the carbon dioxide-depleted stream across the second feed side,(iii) passing air, oxygen-enriched air, or oxygen as a sweep stream across the second permeate side,(iv) withdrawing from the second feed side a stream that is depleted in carbon dioxide compared to the feed gas,(v) withdrawing from the second permeate side a permeate stream comprising oxygen and carbon dioxide; and(e) passing the permeate stream back to the power generation process. 12. The process of claim 11, wherein at least a portion of the recycle gas stream is routed back to the power generation process after the combustion step, as part of the working gas stream to the gas turbine. 13. The process of claim 11, wherein at least a portion of the recycle gas stream is routed back to the power generation process prior to the combustion step, as part of the oxygen-containing gas provided to the combustion step. 14. The process of claim 11, wherein at least a portion of the permeate stream is routed back to the power generation process after the combustion step, as part of the working gas stream to the gas turbine. 15. The process of claim 11, wherein at least a portion of the permeate stream is routed back to the power generation process prior to the combustion step, as part of the oxygen-containing gas provided to the combustion step. 16. The process of claim 11, wherein the oxygen-containing gas provided to the combustion step comprises at least 15 volume % oxygen. 17. The process of claim 11, wherein the combustor exhaust stream comprises at least 2 volume % oxygen. 18. The process of claim 11, wherein the process recovers at least 80 volume % of the carbon dioxide generated by the combustion step into the partially concentrated carbon dioxide product stream. 19. The process of claim 11, wherein the partially concentrated carbon dioxide product stream contains at least 20 volume % carbon dioxide. 20. The process of claim 11, wherein the membrane exhibits a selectivity for carbon dioxide over oxygen of at least 10.
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이 특허에 인용된 특허 (11)
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