Catalysts, reactors and methods of producing hydrogen via the water-gas shift reaction
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C10J-003/84
C10J-003/00
B01J-023/00
출원번호
US-0669263
(2003-09-25)
등록번호
US-7488360
(2009-02-10)
발명자
/ 주소
Wang,Yong
Tonkovich,Anna Lee Y.
출원인 / 주소
Battelle Memorial Institute
대리인 / 주소
Rosenberg,Frank
인용정보
피인용 횟수 :
0인용 특허 :
18
초록▼
The reaction of carbon monoxide with steam over an alkali-modified ruthenium-on-zirconia catalyst has been found to yield surprisingly high yields of hydrogen gas at relatively low temperatures. Catalyst structures, reactors, hydrogen production systems, and methods for producing hydrogen utilizing
The reaction of carbon monoxide with steam over an alkali-modified ruthenium-on-zirconia catalyst has been found to yield surprisingly high yields of hydrogen gas at relatively low temperatures. Catalyst structures, reactors, hydrogen production systems, and methods for producing hydrogen utilizing the alkali-modified ruthenium-on-zirconia catalyst are described. Methods of making catalysts are also described.
대표청구항▼
We claim: 1. A catalyst comprising: a porous substrate having an average pore size of from 1 μm to 1000 μm; and disposed over the porous substrate, a zirconia-supported, alkali-metal-modified, ruthenium catalyst; the catalyst being characterizable by a test in which the catalyst is placed
We claim: 1. A catalyst comprising: a porous substrate having an average pore size of from 1 μm to 1000 μm; and disposed over the porous substrate, a zirconia-supported, alkali-metal-modified, ruthenium catalyst; the catalyst being characterizable by a test in which the catalyst is placed in a reaction chamber and contacted with a reactant gas mixture containing 8% CO, 7% CO2, 38% H2, and 47% H2O, at a contact time of 25 ms and a temperature of 420�� C., resulting in greater than 70% CO conversion and at least 80% CO2 selectivity. 2. The catalyst of claim 1 made by steps comprising: co-impregnating zirconia with solution containing Ru and K, calcining, and reducing. 3. The catalyst of claim 1 comprising 0.1 to 10 wt % Ru and 0.1 to 10 wt % K. 4. The catalyst of claim 3 wherein at least 50% of the catalyst's pore volume is composed of pores in the size range of 0.3 to 200 microns. 5. The catalyst of claim 4 characterizable by a test in which the catalyst is placed in a reaction chamber and contacted with a reactant gas mixture containing 8% CO , 7% CO2, 38% H2, and 47% H2O, at a contact time of 25 ms and a temperature of 420�� C., resulting in 70 to 85% CO conversion and at least 85% CO2 selectivity. 6. The catalyst of claim 1 comprising a large pore support wherein at least 20% of the catalyst's pore volume is composed of pores in the diameter size range of 0.1 to 300 microns. 7. The catalyst of claim 1 wherein the porous substrate comprises FeCrAlY. 8. The catalyst of claim 1 comprising 0.2 to 3 wt % Ru and 0.1 to 10 wt % K. 9. The catalyst of claim 8 comprising 0.5 to 3 wt % K. 10. The catalyst of claim 8 wherein at least 20% of the catalyst's pore volume pore volume is composed of pores in the size range of 0.1 to 300 microns. 11. The catalyst of claim 10 characterizable by a test in which the catalyst is placed in a reaction chamber and contacted with a reactant gas mixture containing 8% CO, 7% CO2, 38% H2, and 47% H2O, at a contact time of 50 ms and a temperature of 325�� C., resulting 70 to 85% CO conversion and 80-95% CO2 selectivity. 12. The catalyst of claim 1 having a pore volume of 30 to 95% . 13. The catalyst of claim 1 wherein at least 20% of the catalyst's pore volume is composed of pores in the size range of 1 to 100 microns. 14. The catalyst of claim 1 wherein the porous substrate comprises a felt. 15. A catalyst comprising: a porous substrate having an average pore size of from 1 μm to 1000 μm; and disposed over the porous substrate, a zirconia-supported, alkali-metal-modified, ruthenium catalyst; the catalyst being characterizable by a test in which the catalyst is placed in a reaction chamber and contacted with a reactant gas mixture containing 8% CO, 7% CO2, 38% H2, and 47% H2O, at a contact time of 50 ms and a temperature of 325�� C., resulting in greater than 70% CO conversion and at least 80% CO2 selectivity. 16. The catalyst of claim 15 characterizable by a test in which the catalyst is placed in a reaction chamber and contacted with a reactant gas mixture containing 8% CO, 7% CO2, 38% H2, and 47% H2O, at a contact time of 50 ms and a temperature of 325�� C., resulting 70 to 85% CO conversion and 80-95% CO2 selectivity. 17. The catalyst of claim 15 characterizable by a test in which the catalyst is placed in a reaction chamber and contacted with a reactant gas mixture containing 8% CO, 7% CO2, 38% H2, and 47% H2O, at a contact time of 25 ms and a temperature of 420�� C., resulting in 70 to 85% CO conversion and at least 80% CO2 selectivity. 18. A catalyst comprising: a porous substrate having an average pore size of from 1 μm to 1000 μm; and disposed over the porous substrate, a zirconia-supported, alkali-metal-modified, ruthenium catalyst comprising 0.2 to 3 wt % Ru and 0.1 to 10 wt % K, and further wherein the ZrO2 has a BET surface area greater than 10 m2/g.
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