Method of power generation via coal gasification and liquid hydrocarbon synthesis
AssigneeChevron Research Company
InventorClark J. Egan
Life of this patent
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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.
Claims10
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.sub.2, CO, CO.sub.2 and synthetic hydrocarbons;
- c. separating from said reaction product mixture a gaseous first fraction comprising H.sub.2, CO, CO.sub.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.
Dependencies are inferred from the claim text.