Process for base-load and peak-load power generation
First Claim
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1. 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) contacting a first portion of said synthesis gas with a hydrocarbon synthesis catalyst, thereby forming a reaction product mixture containing water, H2, CO, CO2, oxygenated organic compounds and synthetic hydrocarbons;
(c) contacting said reaction product mixture prior to formation of an aqueous phase therein with a hydrogenation catalyst under hydrogenation conditions, thereby converting said organic compounds to water and combustible hydrocarbons;
(d) thereafter separating from said reaction product mixture C3 + hydrocarbons;
(e) combusting a second portion of said synthesis gas and generating power from the resulting combusted synthesis gas; and
(f) combusting at least a portion of said C3 + hydrocarbons and generating additional power from the resulting combusted hydrocarbons.
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Abstract
Disclosed is an integrated process for the generation of base-load and peak-load power, particularly electrical power, from a solid carbonaceous material. A solid carbonaceous material is gasified to produce a combustible synthesis gas. A portion of this synthesis gas is contacted with a Fischer-Tropsch catalyst to produce condensable hydrocarbons. Preferably, a second portion of the synthesis gas is combusted and utilized to generate a base-load power output and the condensable hydrocarbons are utilized as a fuel as needed for peak-load power production.
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Citations
10 Claims
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1. A process for the generation of power from a solid carbonaceous material which comprises:
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(a) forming a combustible synthesis gas by reacting said carbonaceous material with steam and oxygen at an elevated temperature; (b) contacting a first portion of said synthesis gas with a hydrocarbon synthesis catalyst, thereby forming a reaction product mixture containing water, H2, CO, CO2, oxygenated organic compounds and synthetic hydrocarbons; (c) contacting said reaction product mixture prior to formation of an aqueous phase therein with a hydrogenation catalyst under hydrogenation conditions, thereby converting said organic compounds to water and combustible hydrocarbons; (d) thereafter separating from said reaction product mixture C3 + hydrocarbons; (e) combusting a second portion of said synthesis gas and generating power from the resulting combusted synthesis gas; and (f) combusting at least a portion of said C3 + hydrocarbons and generating additional power from the resulting combusted hydrocarbons. - View Dependent Claims (4, 5, 6, 7, 8)
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2. A process for the generation of power from a solid carbonaceous material which comprises:
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(a) forming a combustible synthesis gas by reacting said carbonaceous material with steam and oxygen at an elevated temperature; (b) passing said synthesis gas into a reaction zone containing a hydrocarbon synthesis catalyst and a hydrogeneration catalyst forming a reaction product mixture containing water, H2, CO, CO2, oxygenated organic compounds and synthetic hydrocarbons including propane and higher boiling hydrocarbons; (c) separating from said reaction product mixture C3 + hydrocarbons and a combustible normally gaseous fraction; (d) combusting said gaseous fraction and generating power from said combusted fraction; and (e) combusting at least a portion of said C3 + hydrocarbons and generating additional power from said combusted hydrocarbons. - View Dependent Claims (3)
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9. A process for the generation of power from a solid carbonaceous material which comprises:
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(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, H2, CO, CO2 and synthetic hydrocarbons; (c) separating from said reaction product mixture a gaseous first fraction comprising H2, CO, CO2 and light hydrocarbons, a second fraction comprising normally liquid hydrocarbons and a third fraction comprising water; (d) combusting at least a portion of said gaseous first fraction and combusting a second portion of said synthesis gas and generating power from said combusted gaseous first fraction and said combusted second portion of said synthesis gas; 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. - View Dependent Claims (10)
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Specification