Hydrogen purification membranes, components and fuel processing systems containing the same
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B01D-053/22
B01J-008/02
C01B-003/26
C01B-003/00
출원번호
US-0726387
(2007-03-20)
등록번호
US-7410531
(2008-08-12)
발명자
/ 주소
Edlund,David J.
Pledger,William A.
Studebaker,R. Todd
출원인 / 주소
Idatech, LLC
대리인 / 주소
Dascenzo Intellectual Property Law, P.C.
인용정보
피인용 횟수 :
18인용 특허 :
169
초록▼
Hydrogen-producing fuel processing systems, hydrogen purification membranes, hydrogen purification devices, and fuel processing and fuel cell systems that include hydrogen purification devices. In some embodiments, the fuel processing systems and the hydrogen purification membranes include a metal m
Hydrogen-producing fuel processing systems, hydrogen purification membranes, hydrogen purification devices, and fuel processing and fuel cell systems that include hydrogen purification devices. In some embodiments, the fuel processing systems and the hydrogen purification membranes include a metal membrane, which is at least substantially comprised of palladium or a palladium alloy. In some embodiments, the membrane contains trace amounts of carbon, silicon, and/or oxygen. In some embodiments, the membranes form part of a hydrogen purification device that includes an enclosure containing a separation assembly, which is adapted to receive a mixed gas stream containing hydrogen gas and to produce a stream that contains pure or at least substantially pure hydrogen gas therefrom. In some embodiments, the membrane(s) and/or purification device forms a portion of a fuel processor, and in some embodiments, the membrane(s) and/or purification device forms a portion of a fuel processing or fuel cell system.
대표청구항▼
We claim: 1. A hydrogen-producing fuel processing assembly, comprising: a hydrogen-producing region adapted to produce a mixed gas stream from at least one feed stream, wherein the mixed gas stream includes hydrogen gas as a majority component and other gases; an enclosure defining an internal comp
We claim: 1. A hydrogen-producing fuel processing assembly, comprising: a hydrogen-producing region adapted to produce a mixed gas stream from at least one feed stream, wherein the mixed gas stream includes hydrogen gas as a majority component and other gases; an enclosure defining an internal compartment having an internal surface; a separation assembly within the internal compartment, wherein the separation assembly is adapted to receive a mixed gas stream and to divide the mixed gas stream into a hydrogen-rich permeate stream, which has a greater concentration of hydrogen gas than the mixed gas stream, and a byproduct stream, which comprises a greater concentration of the other gases than the mixed gas stream, and further wherein the separation assembly comprises: at least one hydrogen-selective membrane having a mixed gas surface and a permeate surface, wherein the permeate stream includes hydrogen gas that permeates through the membrane from the mixed gas surface to the permeate surface, and further wherein the byproduct stream includes at least a portion of the mixed gas stream that does not permeate through the membrane; a support structure for the at least one hydrogen-selective membrane; and at least one guide structure projecting from the enclosure into the internal compartment to define a position for the separation assembly within the internal compartment. 2. The assembly of claim 1, wherein the device includes a plurality of guide structures that project into the internal compartment to define the position of the separation assembly within the internal compartment. 3. The assembly of claim 1, wherein the guide structure includes a rib that projects into the internal compartment. 4. The assembly of claim 1, wherein the enclosure is formed from a material, and further wherein the guide structure is formed from the same material as the enclosure. 5. The assembly of claim 4, wherein the guide structure is integrally formed with the enclosure. 6. The assembly of claim 1, wherein the separation assembly includes a plurality of hydrogen-selective membranes. 7. The assembly of claim 1, wherein the separation assembly includes at least a plurality of hydrogen-selective membranes, each having a mixed gas surface and a permeate surface, wherein the hydrogen-selective membranes are spaced-apart from each other and oriented with their permeate surfaces generally facing each other to define a harvesting conduit extending therebetween, and further wherein the permeate stream is formed from at least a portion of the mixed gas stream that passes through the hydrogen-selective membranes to the harvesting conduit, with the byproduct stream being formed from at least a portion of the mixed gas stream that remains on the mixed gas surface of the hydrogen-selective membranes, wherein the separation assembly further includes a support within the harvesting conduit and adapted to support the plurality of hydrogen-selective membranes, and further wherein the support includes a pair of generally opposed surfaces which are adapted to provide support to a respective one of the permeate surfaces of the hydrogen-selective membranes. 8. The assembly of claim 7, wherein the support is adapted to permit flow of gas both parallel and transverse to the permeate surfaces of the membranes. 9. The assembly of claim 1, wherein the enclosure includes an input port adapted to receive the mixed gas stream from the hydrogen-producing region. 10. The assembly of claim 1, wherein the hydrogen-producing region is located within the internal compartment, and further wherein the enclosure includes an input port adapted to receive the at least one feed stream. 11. The assembly of claim 1, further comprising a vaporization region adapted to receive and vaporize a liquid feed stream comprising a carbon-containing feedstock and water. 12. The assembly of claim 1, further comprising a polishing catalyst bed including a methanation catalyst, wherein the polishing catalyst bed is in fluid communication with the separation assembly and is adapted to receive the hydrogen-rich permeate stream therefrom and produce a product stream from the hydrogen-rich permeate stream, wherein the polishing catalyst bed is adapted to reduce the concentration of carbon dioxide and carbon monoxide in the hydrogen-rich permeate stream by catalytic reaction to produce methane. 13. The assembly of claim 12, wherein the polishing catalyst bed is at least partially located within the internal compartment of the enclosure. 14. The assembly of claim 13, wherein a portion of the polishing catalyst bed extends external the internal compartment of the enclosure. 15. The assembly of claim 12, wherein the polishing catalyst bed is located external the internal compartment of the enclosure. 16. The assembly of claim 1, wherein the separation assembly is adapted to produce a byproduct stream containing approximately 20-50% of the stoichiometrically available hydrogen gas in the mixed gas stream. 17. The assembly of claim 1, wherein the amount of hydrogen gas in the hydrogen-rich permeate stream is less than a stoichiometrically available amount of hydrogen gas. 18. The assembly of claim 1, wherein the amount of hydrogen gas in the hydrogen-rich permeate stream is between approximately 50% and approximately 80% of the stoichiometrically available hydrogen gas in the mixed gas stream. 19. The assembly of claim 1, further comprising a heating assembly that includes a combustion region adapted to receive and combust a fuel stream to produce a heated exhaust stream to heat the hydrogen-producing region. 20. The assembly of claim 1, wherein the fuel stream is at least partially comprised of the byproduct stream, and further wherein the byproduct stream contains at least 20 wt % hydrogen gas. 21. The assembly of claim 1, in combination with a fuel cell stack adapted to receive at least a portion of the hydrogen-rich permeate stream and to produce an electric current therefrom. 22. The assembly of claim 21, wherein the combustion region is adapted to receive air for supporting combustion from the fuel cell stack.
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