Integrated electrical power and chemical production using fuel cells
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H01M-008/06
F02C-003/22
H01M-008/04
C21B-015/00
C04B-007/36
C01B-003/50
C07C-029/151
C10G-002/00
C07C-001/04
C10K-003/04
C01B-003/16
C25B-003/02
C01B-003/34
H01M-008/14
출원번호
US-0207706
(2014-03-13)
등록번호
US-9455463
(2016-09-27)
발명자
/ 주소
Berlowitz, Paul J.
Barckholtz, Timothy Andrew
Hershkowitz, Frank
출원인 / 주소
ExxonMobil Research and Engineering Company
대리인 / 주소
Weisberg, David M.
인용정보
피인용 횟수 :
0인용 특허 :
47
초록▼
In various aspects, systems and methods are provided for operating a molten carbonate fuel cell, such as a fuel cell assembly, with increased production of syngas while also reducing or minimizing the amount of CO2 exiting the fuel cell in the cathode exhaust stream. This can allow for improved effi
In various aspects, systems and methods are provided for operating a molten carbonate fuel cell, such as a fuel cell assembly, with increased production of syngas while also reducing or minimizing the amount of CO2 exiting the fuel cell in the cathode exhaust stream. This can allow for improved efficiency of syngas production while also generating electrical power.
대표청구항▼
1. A method for producing electricity using a molten carbonate fuel cell comprising an anode and a cathode, the method comprising: introducing an anode fuel stream comprising a reformable fuel into the anode of the molten carbonate fuel cell, an internal reforming element associated with the anode o
1. A method for producing electricity using a molten carbonate fuel cell comprising an anode and a cathode, the method comprising: introducing an anode fuel stream comprising a reformable fuel into the anode of the molten carbonate fuel cell, an internal reforming element associated with the anode of the molten carbonate fuel cell, or a combination thereof;introducing a cathode inlet stream comprising CO2 and O2 into the cathode of the molten carbonate fuel cell;generating electricity within the molten carbonate fuel cell; andgenerating an anode exhaust from an anode outlet of the molten carbonate fuel cell;wherein a ratio of net moles of syngas in the anode exhaust to moles of CO2 in a cathode exhaust is at least about 2.0, and wherein less than 10 vol % of the anode exhaust is directly or indirectly recycled to the cathode of the molten carbonate fuel cell. 2. The method of claim 1, wherein the ratio of net moles of syngas in the anode exhaust to moles of CO2 in the cathode exhaust is at least about 3.0. 3. The method of claim 2, wherein the ratio of net moles of syngas in the anode exhaust to moles of CO2 in the cathode exhaust is at least about 4.0. 4. The method of claim 1, wherein the method further comprises separating from the anode exhaust a H2-containing stream, a syngas-containing stream, or a combination thereof. 5. The method of claim 4, further comprising separating the H2-containing stream from the anode exhaust prior to separating the syngas-containing stream from the anode exhaust, the H2-containing stream containing at least about 90 vol % H2. 6. The method of claim 4, wherein the syngas-containing stream has a molar ratio of H2 to CO of about 3.0:1 to about 1.0:1. 7. The method of claim 4, further comprising separating at least one of CO2 and H2O from one or a combination of i) the anode exhaust, ii) the H2-containing stream, and iii) the syngas-containing stream. 8. The method of claim 4, further comprising separating a stream containing at least about 90 vol % H2 from the syngas-containing stream. 9. The method of claim 1, wherein the anode exhaust has a ratio of H2 to CO of about 1.5:1 to about 10:1. 10. The method of claim 1, wherein the anode fuel stream comprises at least about 10 vol % inert compounds, at least about 10 vol % CO2, or a combination thereof. 11. The method of claim 1, wherein less than 10 vol % of H2 produced in the anode of the molten carbonate fuel cell in a single pass is directly or indirectly recycled to the anode of the molten carbonate fuel cell or the cathode of the molten carbonate fuel cell. 12. The method of claim 1, wherein less than 10 vol % of the syngas-containing stream is directly or indirectly recycled to the anode of the molten carbonate fuel cell or the cathode of the molten carbonate fuel cell. 13. The method of claim 1, wherein no portion of the anode exhaust is directly or indirectly recycled to the anode of the molten carbonate fuel cell, directly or indirectly recycled to the cathode of the molten carbonate fuel cell, or a combination thereof. 14. The method of claim 1, wherein the cathode inlet stream comprises a combustion exhaust stream from a combustion-powered generator. 15. The method of claim 1, wherein the molten carbonate fuel cell is operated at a voltage VA of about 0.67 Volts or less. 16. The method of claim 1, wherein less than 5 vol % of the anode exhaust is directly or indirectly recycled to the cathode of the molten carbonate fuel cell. 17. A method for producing electricity using a molten carbonate fuel cell comprising an anode and a cathode, the method comprising: introducing an anode fuel stream comprising a reformable fuel into the anode of the molten carbonate fuel cell, an internal reforming element associated with the anode of the molten carbonate fuel cell, or a combination thereof;introducing a cathode inlet stream comprising CO2 and O2 into the cathode of the molten carbonate fuel cell, a CO2 concentration in the cathode inlet stream being about 6 vol % or less;generating electricity within the molten carbonate fuel cell; andgenerating an anode exhaust from an anode outlet of the molten carbonate fuel cell;wherein a ratio of net moles of syngas in the anode exhaust to moles of CO2 in a cathode exhaust is at least about 1.5. 18. The method of claim 17, wherein a ratio of net moles of syngas in the anode exhaust to moles of CO2 in the cathode exhaust is at least about 3.0. 19. The method of claim 17, wherein less than 10 vol % of the anode exhaust is directly or indirectly recycled to the cathode of the molten carbonate fuel cell. 20. The method of claim 17, wherein no portion of the anode exhaust is directly or indirectly recycled to the anode of the molten carbonate fuel cell, directly or indirectly recycled to the cathode of the molten carbonate fuel cell, or a combination thereof. 21. The method of claim 17, wherein the CO2 concentration in the cathode inlet stream is about 5 vol % or less. 22. The method of claim 17, wherein less than 5 vol % of the anode exhaust is directly or indirectly recycled to the cathode of the molten carbonate fuel cell.
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