US3986349A
Expired / Lapsed
US
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Method of power generation via coal gasification and liquid hydrocarbon synthesis
Assignee: Chevron USA Inc
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Filing: 1975-09-15
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Granted: 1976-10-19
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Expires: 1995-09-15
Abstract
Abstract Disclosed is an integrated process for the generation of power, particularly electrical power, from a solid carbonaceous material. A solid carbonaceous material is gasified to produce a combustible synthesis gas. A first portion of this synthesis gas is contacted with Fischer-Tropsch and hydrogenation catalysts to produce normally liquid hydrocarbons and a second combustible gaseous stream. Portions of the two combustible gaseous streams are combined and combusted and utilized to generate a base-load power output and the liquid hydrocarbons are utilized as a fuel for a gas turbine to produce supplemental power for peak-load demand.
Inventors
- 👤 Clark J. Egan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:55
CPC Classifications
F; F02; F02C; F02C3/00; F02C3/20; F02C3/26; F02C3/28; C; C07; C07C; C07C1/00; C07C1/02; C07C1/04; C07C1/0485; F01; F01K; F01K23/00; F01K23/02; F01K23/06; F01K23/067; C07C2523/00; C07C2523/70; C07C2523/74; C07C2529/00; C07C2529/04; C10; C10J; C10J2300/00; C10J2300/16; C10J2300/1603; C10J2300/1606; C10J2300/164; C10J2300/1656; C10J2300/1659; C10J2300/1671; C10J2300/1693; C10J2300/18; C10J2300/1838; Y; Y02; Y02E; Y02E20/00; Y02E20/16; Y02E20/18; Y02P; Y02P20/00; Y02P20/10
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
171 words
A process for the generation of power from a solid carbonaceous material which comprises: a. forming a combustible synthesis gas by reacting said carbonaceous material with steam and oxygen at an elevated temperature; b. passing a first portion of said synthesis gas into a reaction zone containing a hydrocarbon synthesis catalyst and a hydrogenation catalyst and forming a reaction product mixture containing water, H 2 , CO, CO 2 and synthetic hydrocarbons; c. separating from said reaction product mixture a gaseous first fraction comprising H 2 , CO, CO 2 and light hydrocarbons, a second fraction comprising normally liquid hydrocarbons and a third fraction comprising water; d. combining at least a portion of said first fraction with a second portion of said synthesis gas and combusting said combined gases and generating power from said combusted gases; and e. generating additional power from said liquid hydrocarbons by combusting at least a portion of said hydrocarbons forming a flue gas and passing said flue gas through an expansion turbine as the working fluid.
Claim 2
Dependent Claim
171 words
A process for the generation of power from a solid carbonaceous material which comprises: a. forming a combustible synthesis gas by reacting said carbonaceous material with steam and oxygen at an elevated temperature; b. passing a first portion of said synthesis gas into a reaction zone containing a hydrocarbon synthesis catalyst and a hydrogenation catalyst and forming a reaction product mixture containing water, H 2 , CO, CO 2 and synthetic hydrocarbons; c. separating from said reaction product mixture a gaseous first fraction comprising H 2 , CO, CO 2 and light hydrocarbons, a second fraction comprising normally liquid hydrocarbons and a third fraction comprising water; d. combining at least a portion of said first fraction with a second portion of said synthesis gas and combusting said combined gases and generating power from said combusted gases; and e. generating additional power from said liquid hydrocarbons by combusting at least a portion of said hydrocarbons forming a flue gas and passing said flue gas through an expansion turbine as the working fluid.
Claim 3
Dependent Claim
34 words
The process of claim 1 wherein said combined gases are combusted to generate steam and electrical power is generated from said steam by expanding said steam through a turbine coupled to an electrical generator.
Claim 4
Dependent Claim
15 words
The process of claim 1 wherein said power in steps (d) and (e) is electrical.
Claim 5
Dependent Claim
29 words
The process of claim 1 wherein said synthesis gas comprises H 2 and CO and the ratio of H 2 to CO is in the range 0.75:1 to 3:1.
Claim 6
Dependent Claim
23 words
The process of claim 1 wherein said hydrogenation catalyst comprises a Group VIII metal deposited on a low or non-acidic refractory metal oxide.
Claim 7
Dependent Claim
17 words
The process of claim 1 wherein said hydrogenation catalyst is deposited on a cracking support containing zeolite.
Claim 8
Dependent Claim
44 words
The process of claim 1 wherein said reaction zone contains a first layer of a hydrocarbon synthesis catalyst and a second layer of a hydrocracking catalyst and the volume ratio of said hydrocarbon synthesis catalyst to said hydrocracking catalyst is in the range 10/1:1/2.
Claim 9
Dependent Claim
27 words
The process of claim 7 wherein said hydrocarbon synthesis catalyst comprises an iron-copper catalyst and said hydrocracking catalyst comsprises palladium deposited on a cracking support containing zeolite.
Claim 10
Dependent Claim
11 words
The process of claim 1 wherein said carbonaceous material is coal.
Claim 11
Dependent Claim
41 words
The process of claim 1 wherein said synthesis gas also contains CO 2 , H 2 S and NH 3 , and substantially all of said CO 2 , H 2 S and NH 3 are separated from said synthesis gas.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-10-19 | 1980-04-19 | 1980-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-10-19 | 1984-04-19 | 1984-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-10-19 | 1988-04-19 | 1988-10-19 | $7700.00 | Window Closed / Lapsed |