Hydrogen production apparatus and fuel cell system using the same
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H01M-008/06
H01M-008/04
C01B-003/58
C01B-003/38
C01B-003/48
출원번호
US-0935823
(2009-03-09)
등록번호
US-8945784
(2015-02-03)
우선권정보
JP-2008-090813 (2008-03-31)
국제출원번호
PCT/JP2009/054380
(2009-03-09)
§371/§102 date
20100930
(20100930)
국제공개번호
WO2009/122861
(2009-10-08)
발명자
/ 주소
Sato, Yasushi
Kato, Emi
Matsumoto, Takaya
Kadowaki, Masataka
Yukawa, Ryuji
Kajita, Takuya
출원인 / 주소
JX Nippon Oil & Energy Corporation
대리인 / 주소
Cantor Colburn LLP
인용정보
피인용 횟수 :
0인용 특허 :
1
초록▼
There are provided a hydrogen production apparatus and a hydrogen producing method that can easily bring the temperature of a gas to be supplied to a preferential oxidation catalyst bed to a proper range without the necessity of flow rate control of a cooling medium, and a fuel cell system which is
There are provided a hydrogen production apparatus and a hydrogen producing method that can easily bring the temperature of a gas to be supplied to a preferential oxidation catalyst bed to a proper range without the necessity of flow rate control of a cooling medium, and a fuel cell system which is relatively inexpensive and can easily realize stable operation. The hydrogen producing method includes a reforming step of obtaining a hydrogen-containing gas from a raw material for hydrogen production by utilizing a reforming reaction, a shift reaction step of reducing the concentration of carbon monoxide in the gas obtained from the reforming step by a shift reaction, a cooling step of cooling the gas obtained from the shift reaction step, a heating step of heating the gas cooled in the cooling step and a preferential oxidation reaction step of reducing the concentration of carbon monoxide in the gas heated in the heating step, wherein in the heating step, the gas cooled in the cooling step is heated by heat exchange with the use of heat generated by the preferential oxidation reaction. A hydrogen production apparatus suitable for implementing this method. A fuel cell system provided with the hydrogen production apparatus.
대표청구항▼
1. A hydrogen production apparatus comprising: a reformer configured to obtain a hydrogen-containing gas from a raw material for hydrogen production by utilizing a reforming reaction;a shift reactor configured to reduce the concentration of carbon monoxide in the gas obtained from the reformer by a
1. A hydrogen production apparatus comprising: a reformer configured to obtain a hydrogen-containing gas from a raw material for hydrogen production by utilizing a reforming reaction;a shift reactor configured to reduce the concentration of carbon monoxide in the gas obtained from the reformer by a shift reaction;a cooler configured to cool the gas obtained from the shift reactor;a heat exchange structure configured to heat the gas cooled by the cooler; anda preferential oxidation reactor comprising a preferential oxidation catalyst bed packed with a catalyst capable of promoting a preferential oxidation reaction which preferentially oxidizes carbon monoxide, the preferential oxidation reactor being configured to reduce the concentration of carbon monoxide in the gas heated by the heat exchange structure,wherein the cooler is provided downstream of the shift reactor, and the heat exchange structure and the preferential oxidation reactor are provided separately from and downstream of the cooler; andwherein the heat exchange structure and the preferential oxidation reactor are configured so that the gas cooled by the cooler is heated upstream of the preferential oxidation catalyst bed with the use of heat generated by the preferential oxidation reaction. 2. The hydrogen production apparatus according to claim 1, wherein the heat exchange structure is a structure capable of exchanging heat between the gas cooled by the cooler and at least one of a gas discharged from the preferential oxidation catalyst bed and the preferential oxidation catalyst bed. 3. The hydrogen production apparatus according to claim 2, comprising a structure in which the preferential oxidation reactor is integrated with the heat exchange structure. 4. The hydrogen production apparatus according to claim 3, wherein the structure in which the preferential oxidation reactor is integrated with the heat exchange structure comprises a double tube structure, and the preferential oxidation catalyst bed is housed in the interior of an inner tube of the double tube structure, and an annular section of the double tube structure is made to be a channel for the gas cooled by the cooler. 5. The hydrogen production apparatus according to claim 3, wherein the structure in which the preferential oxidation reactor is integrated with the heat exchange structure comprises a double tube structure,the interior of the inner tube of the double tube structure is made to be a channel for the gas cooled by the cooler, and the preferential oxidation catalyst bed is housed in a region of a part of the annular section of the double tube structure, anda region of another part of the annular section located downstream of the former region in a flow direction of the gas that flows through the annular section is made to be a channel for the gas discharged from the preferential oxidation catalyst bed. 6. The hydrogen production apparatus according to claim 1, comprising a condensed water separation means for separating condensed water generated through cooling by the cooler from the gas obtained from the shift reactor. 7. The hydrogen production apparatus according to claim 1, wherein the cooler is a water-cooling cooler. 8. The hydrogen production apparatus according to any claim 7, wherein the cooling medium in the cooler is process water for reforming. 9. A hydrogen producing method, comprising: obtaining a hydrogen-containing gas from a raw material for hydrogen production by utilizing a reformer;reducing the concentration of carbon monoxide in the hydrogen-containing gas by a shift reactor;cooling the gas obtained from the shift reactor by a cooler;heating the cooled gas by a heat exchange structure; andreducing the concentration of carbon monoxide in the heated gas using a preferential oxidation reactor comprising a preferential oxidation catalyst bed packed with a catalyst capable of promoting a preferential oxidation reaction which preferentially oxidizes carbon monoxide,wherein the cooler is provided downstream of the shift reactor, and the heat exchange structure and the preferential oxidation reactor are provided separately from and downstream of the cooler, andwherein in the heating the cooled gas, the cooled gas is heated upstream of the preferential oxidation catalyst bed by heat exchange with the use of heat generated by the preferential oxidation reaction. 10. The hydrogen producing method according to claim 9, wherein in the cooling the gas obtained from the shift reaction, the gas obtained from the shift reaction is cooled to 0° C. or above and 120° C. or below. 11. The hydrogen producing method according claim 9, wherein the temperature of the preferential oxidation catalyst bed is made to be 80° C. or above and 250° C. or below. 12. A fuel cell system comprising: a hydrogen production apparatus comprising:a reformer configured to obtain a hydrogen-containing gas from a raw material for hydrogen production by utilizing a reforming reaction,a shift reactor configured to reduce the concentration of carbon monoxide in the gas obtained from the reformer by a shift reaction,a cooler configured to cool the gas obtained from the shift reactor,a heat exchange structure configured to heat the gas cooled by the cooler, anda preferential oxidation reactor comprising a preferential oxidation catalyst bed packed with a catalyst capable of promoting a preferential oxidation reaction which preferentially oxidizes carbon monoxide, the preferential oxidation reactor being configured to reduce the concentration of carbon monoxide in the gas heated by the heat exchange structure,wherein the cooler is provided downstream of the shift reactor, and the heat exchange structure and the preferential oxidation reactor are provided separately from and downstream of the cooler; andthe heat exchange structure and the preferential oxidation reactor are configured so that the gas cooled by the cooler is heated upstream of the preferential oxidation catalyst bed with the use of heat generated by the preferential oxidation reaction; anda fuel cell for generating electric power using hydrogen obtained from the hydrogen production apparatus as fuel. 13. The fuel cell system according to claim 12, wherein the cooler is a water-cooling cooler and a cooling medium in the cooler is process water for reforming. 14. The fuel cell system according to claim 12, further comprising a hot-water storage tank, wherein the cooler is a water-cooling cooler, anda cooling medium in the cooler is heat-recovery water for the hot-water storage tank. 15. The fuel cell system according to claim 12, further comprising a hot-water storage tank, wherein the cooler is a water-cooling cooler, and a cooling medium in the cooler is process water for reforming and heat-recovery water for the hot-water storage tank. 16. The hydrogen production apparatus according to claim 1, wherein the cooler is provided separately from the shift reactor, and the heat exchange structure and the preferential oxidation reactor are provided separately from the cooler. 17. The hydrogen producing method according to claim 9, wherein the cooler is provided separately from the shirt reactor, and the heat exchange structure and the preferential oxidation reactor are provided separately from the cooler. 18. The fuel cell system according to claim 12, wherein the cooler is provided separately from the shift reactor, and the heat exchange structure and the preferential oxidation reactor are provided separately from the cooler.
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이 특허에 인용된 특허 (1)
Clawson,Lawrence G.; Dorson,Matthew H.; Mitchell,William L.; Nowicki,Brian J.; Bentley,Jeffrey M.; Davis,Robert; Rumsey,Jennifer W., Auxiliary reactor for a hydrocarbon reforming system.
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