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Kafe 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0339962 (1982-01-18) |
발명자 / 주소 |
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출원인 / 주소 |
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대리인 / 주소 |
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인용정보 | 피인용 횟수 : 281 인용 특허 : 3 |
Utilizing air, rather than oxygen, to convert coal to synthesis gas containing very high proportions of inert nitrogen; subjecting this entire gas, possibly with intermediate cleanup, e.g., sulfur removal, to conversion over a special metal-zeolite catalyst to produce a product comprising C 5 to C 1
Utilizing air, rather than oxygen, to convert coal to synthesis gas containing very high proportions of inert nitrogen; subjecting this entire gas, possibly with intermediate cleanup, e.g., sulfur removal, to conversion over a special metal-zeolite catalyst to produce a product comprising C 5 to C 11 normally liquid hydrocarbons, a gas containing C 1 to C 4 hydrocarbons, carbon dioxide and large proportions of nitrogen, and an aqueous product comprising water; utilizing the gas product to run electric power generation equipment, such as a direct fired turbine, at base load levels; storing and accumulating the liquid product; and intermittently using the liquid product for electric power generation to meet higher than base loads, including peak load situations.
1. In the conversion of coal to electricity by the gasification of said coal to a combustible synthesis gas and the combustion of said gas in an electricity generating mode to thereby produce electricity; the improvement which comprises conducting said gasification of coal with air to a combustible
1. In the conversion of coal to electricity by the gasification of said coal to a combustible synthesis gas and the combustion of said gas in an electricity generating mode to thereby produce electricity; the improvement which comprises conducting said gasification of coal with air to a combustible synthesis gas comprising carbon monoxide, hydrogen and nitrogen and contacting said combustible gas with a composite catalyst comprising a carbon monoxide reducing metal species component and a hydrocarbon converting crystalline aluminosilicate zeolite component having a high silica to alumina ratio of at least about 15, a constraint index of 1 to 12 and a crystal density of not substantially below about 1.6 grams per cubic centimeter, wherein the weight ratio of said zeolite to said metal species is in the approximate range of between about 0.2/1 and about 5/1, at temperatures of about 450° to 850° F., space velocity of about 0.5 to 10 WHSV and pressures up to about 1000 psig sufficient to convert said combustion synthesis gas to a product comprising a normally liquid fraction comprising C 5 to C 11 hydrocarbon compounds and a gas fraction comprising C 4 - hydrocarbons; continuously burning said C 4 - gas in an electricity generating mode; accumulating and storing said normally liquid fraction in the liquid state; and intermittently burning said stored normally liquid fraction in an electricity generating mode. 2. The improved process claimed in claim 1 wherein said metal species is a Fischer-Tropsch catalyst. 3. The improved process claimed in claim 1 wherein said metal species is selected from the group consisting of iron, cobalt, nickel, rutherium, rhodium, rhenium, thorium, zirconium, chromium and mixtures thereof. 4. The improved process claimed in claim 2 wherein said metal species is iron. 5. The improved process claimed in claim 3 wherein said metal species further comprises other metal selected from the group consisting of alkali and alkaline earth metals. 6. The improved process claimed in claim 1 wherein said zeolite is selected from the group consisting of ZSM-5, ZSM-11, ZSM-12, ZSM-23, ZSM-35 and ZSM-38. 7. The improved process claimed in claim 1 wherein said zeolite is ZSM-5. 8. The improved process claimed in claim 1 wherein said catalyst comprises a potassium promoted iron and ZSM-5. 9. The improved process claimed in claim 1 wherein said metal species and said zeolite are physically mixed to form said composite catalyst. 10. The improved process claimed in claim 1 wherein the weight ratio of said zeolite to said metal species is in the approximate range of between about 0.5/1 and about 2/1. 11. The improved process claimed in claim 1 including removing sulfur values from said combustible synthesis gas. 12. The improved process claimed in claim 1 including resolving said product by condensation of said liquid hydrocarbons and of an aqueous fraction therefrom. 13. The improved process claimed in claim 12 including condensing said product by refrigeration or expansion. 14. The improved process claimed in claim 1 including directly heat exchange cooling said product with a solvent for said normally liquid hydrocarbons. 15. The improved process claimed in claim 1 wherein said gasification is conducted above ground. 16. The improved process claimed in claim 1 wherein said gasification is conducted underground. 17. The improved process claimed in claim 1 including removing ammonia from said combustible synthesis gas. 18. The improved process claimed in claim 1 wherein said burning of C 4 - gas in an electricity generating mode occurs in a direct fired turbine which drives a generator. 19. The improved process claimed in claim 1 wherein said stored normally liquid fraction is burned with air in an electricity generating mode to produce electric power via a stream turbine and generator. 20. The improved process claimed in claim 1 wherein said burning of said stored normally liquid fraction in an electricity generating mode occurs in a direct fired turbine coupled to an electricity generator.
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