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A method for improving the efficiency of a gasification combined cycle system for the coproduction of electric power and one or more chemical or liquid fuel products from a synthesis gas feed containing hydrogen and carbon monoxide. Waste heat is recovered from the chemical reaction system in the fo

A method for improving the efficiency of a gasification combined cycle system for the coproduction of electric power and one or more chemical or liquid fuel products from a synthesis gas feed containing hydrogen and carbon monoxide. Waste heat is recovered from the chemical reaction system in the form of heated water which is used to heat and humidify one or more gas streams introduced into the combustor of the combined cycle system gas turbine. Waste refrigeration recovered from the synthesis gas purification system optionally is used to cool the air inlet to the gas turbine compressor.

대표청구항 ▼

[ We claim:] [1.] In the coproduction of electric power and one or more chemical or liquid fuel products from a synthesis gas feed containing hydrogen and carbon monoxide, wherein said electric power is produced by a generator driven by a combustion turbine system in which inlet air is compressed an

[ We claim:] [1.] In the coproduction of electric power and one or more chemical or liquid fuel products from a synthesis gas feed containing hydrogen and carbon monoxide, wherein said electric power is produced by a generator driven by a combustion turbine system in which inlet air is compressed and combusted with fuel in a combustor to provide hot pressurized combustion gas which is expanded through an expansion turbine to drive said generator, wherein at least a portion of said synthesis gas feed is reacted exothermically to produce said chemical or liquid fuel products, unreacted synthesis gas, and heat of reaction, and wherein said unreacted synthesis gas provides at least a portion of said fuel for said combustor, the efficiency of producing said power and chemical or liquid fuel products is improved by a method which comprises recovering at least a portion of said heat of reaction by indirect heat exchange with water to yield a stream of heated water, heating and humidifying said unreacted synthesis gas by direct contact with a first portion of said stream of heated water to yield heated humidified unreacted synthesis gas, and utilizing said heated humidified unreacted synthesis gas to provide at least a portion of said fuel for said combustor.