High purity, high pressure hydrogen production with in-situ COand sulfur capture in a single stage reactor
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C01B-003/12
C01B-003/16
C01B-003/22
C01B-003/24
C01B-003/26
출원번호
UP-0409843
(2009-03-24)
등록번호
US-7837975
(2011-01-22)
발명자
/ 주소
Iyer, Mahesh V.
Fan, Liang-Shih
Ramkumar, Shwetha
출원인 / 주소
The Ohio State University
대리인 / 주소
Standley Law Group LLP
인용정보
피인용 횟수 :
15인용 특허 :
59
초록▼
A process for producing hydrogen, comprising the steps of: (a) gasifying a fuel into a raw synthesis gas comprising CO, hydrogen, steam and sulfur and halide contaminants in the form of H2S, COS and HX, where X is a halide; (b) passing the raw synthesis gas through a water gas shift reactor (WGSR) i
A process for producing hydrogen, comprising the steps of: (a) gasifying a fuel into a raw synthesis gas comprising CO, hydrogen, steam and sulfur and halide contaminants in the form of H2S, COS and HX, where X is a halide; (b) passing the raw synthesis gas through a water gas shift reactor (WGSR) into which CaO and steam are injected, the CaO reacting with the shifted gas to remove CO2, sulfur and halides in a solid-phase calcium-containing product comprising CaCO3, CaS and CaX2; (c) separating the solid-phase calcium-containing product from an enriched gaseous hydrogen product; and (d) regenerating the CaO by calcining the solid-phase calcium-containing product at a condition selected from the group consisting of: in the presence of steam, in the presence of CO2, in the presence of synthesis gas, in the presence of H2 and O2, under partial vacuum, and combinations thereof. The CaO may have a surface area of at least 12.0 m2/g and a pore volume of at least 0.015 cm3/g, the CaO having a sorption capacity of at least about 70 grams of CO2 per kilogram of CaO.
대표청구항▼
What is claimed is: 1. A process for producing hydrogen, comprising the steps of: gasifying a fuel into a raw synthesis gas comprising CO, hydrogen, steam and sulfur and halide contaminants in the form of H2S, COS and HX, where X is a halide; injecting said raw synthesis gas, CaO and steam simultan
What is claimed is: 1. A process for producing hydrogen, comprising the steps of: gasifying a fuel into a raw synthesis gas comprising CO, hydrogen, steam and sulfur and halide contaminants in the form of H2S, COS and HX, where X is a halide; injecting said raw synthesis gas, CaO and steam simultaneously into a water gas shift reactor (WGSR) wherein said raw synthesis gas transforms into a shifted gas; allowing said shifted gas to react with said CaO in said water gas shift reactor so as to remove sulfur and halides in a solid-phase calcium-containing product comprising CaCO3, CaS and CaX2; separating the solid-phase calcium-containing product from an enriched gaseous hydrogen product; and regenerating the CaO by calcining the solid-phase calcium-containing product at a condition selected from the group consisting of: in the presence of steam, in the presence of CO2, in the presence of synthesis gas, in the presence of H2 and O2, under partial vacuum, and combinations thereof. 2. The process of claim 1 additionally comprising the step of: recycling at least a portion of a product stream from a Fischer-Tropsch reactor, fed by the WGSR, so as to introduce a chemical species selected from the group consisting of: methane, C1-C4 hydrocarbons, CO, hydrogen and combinations thereof back into the WGSR. 3. The process of claim 1 wherein said WSGR has disposed therein a catalyst. 4. The process of claim 3 wherein said catalyst includes a material selected from the group consisting of: Fe, Cu, Co, Mo, W, Cs, Pt, Ph, Pd, other precious metal catalysts, oxides thereof, sulfides thereof, and combinations thereof. 5. The process of claim 2 wherein said WSGR has disposed therein a catalyst. 6. The process of claim 1 wherein said enriched hydrogen product has a purity in the range of from about 70% to about 99.99% H2, a temperature in the range of from about 400 to about 1000 C, and a pressure in the range of from about 1 to about 100 atmosphere. 7. The process of claim 1 wherein said CaO has a surface area of at least 12.0 m2/g and a pore volume of at least 0.015 cm3/g, said CaO having a sorption capacity of at least about 70 grams of CO2 per kilogram of CaO. 8. The process of claim 2 wherein said CaO has a surface area of at least 12.0 m2/g and a pore volume of at least 0.015 cm3/g, said CaO having a sorption capacity of at least about 70 grams of CO2 per kilogram of CaO. 9. A process for producing hydrogen, comprising the steps of: reforming a gaseous hydrocarbon fuel in the presence of CaO and steam to remove CO2, sulfur and halide contaminants in the form of H2S, COS and HX, where X is a halide, in a solid-phase calcium-containing product comprising CaCO3, CaS and CaX2, thereby producing a mixture of CO and hydrogen; separating the solid-phase calcium-containing product from an enriched gaseous hydrogen product; and regenerating the CaO by calcining the solid-phase calcium-containing product at a condition selected from the group consisting of: in the presence of steam, in the presence of CO2, in the presence of synthesis gas, in the presence of H2 and O2, under partial vacuum, and combinations thereof. 10. The process of claim 9 additionally comprising the step of: recycling at least a portion of a product stream from a Fischer-Tropsch reactor, fed by the reformer, so as to introduce a chemical species selected from the group consisting of: methane, C1-C4 hydrocarbons, CO, hydrogen and combinations thereof back into the reformer. 11. The process of claim 9 wherein said reforming step is conducted in the presence of a catalyst. 12. The process of claim 11 wherein said catalyst is selected from the group consisting of: Ni, Pt, Rh, Pd, Ru, W, Mo, oxide thereof, carbides thereof, and sulfides thereof. 13. The process of claim 10 wherein said reforming step is conducted in the presence of a catalyst. 14. The process of claim 9 wherein said enriched hydrogen product has a purity in the range of from about 70% to about 99.99% H2, a temperature in the range of from about 400 to about 1000 C, and a pressure in the range of from about 1 to about 100 atmosphere. 15. The process of claim 9 wherein said CaO has a surface area of at least 12.0 m2/g and a pore volume of at least 0.015 cm3/g, said CaO having a sorption capacity of at least about 70 grams of CO2 per kilogram of CaO. 16. The process of claim 10 wherein said CaO has a surface area of at least 12.0 m2/g and a pore volume of at least 0.015 cm3/g, said CaO having a sorption capacity of at least about 70 grams of CO2 per kilogram of CaO. 17. A process for producing hydrogen, comprising the steps of: at least partially oxidizing a fuel into a raw gas comprising CO, hydrogen, steam and sulfur and halide contaminants in the form of H2S, COS and HX, where X is a halide; injecting said raw synthesis gas, CaO and steam simultaneously into a water gas shift reactor (WGSR) wherein said raw synthesis gas transforms into a shifted gas; allowing said shifted gas to react with said CaO in said water gas shift reactor so as to remove sulfur and halides in a solid-phase calcium-containing product comprising CaCO3, CaS and CaX2; separating the solid-phase calcium-containing product from an enriched gaseous hydrogen product; and regenerating the CaO by calcining the solid-phase calcium-containing product at a condition selected from the group consisting of: in the presence of steam, in the presence of CO2, in the presence of synthesis gas, in the presence of H2 and O2, under partial vacuum, and combinations thereof. 18. The process of claim 17 wherein said WSGR has disposed therein a catalyst. 19. The process of claim 18 wherein said catalyst includes a material selected from the group consisting of: Fe, Cu, Co, Mo, W, Cs, Pt, Ph, Pd, other precious metal catalysts, oxides thereof, sulfides thereof, and combinations thereof. 20. The process of claim 17 wherein said enriched hydrogen product has a purity in the range of from about 70% to about 99.99% H2, a temperature in the range of from about 400 to about 1000 C, and a pressure in the range of from about 1 to about 100 atmosphere. 21. The process of claim 17 wherein said CaO has a surface area of at least 12.0 m2/g and a pore volume of at least 0.015 cm3/g, said CaO having a sorption capacity of at least about 70 grams of CO2 per kilogram of CaO.
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