Gasification combined cycle power generation process with heat-integrated chemical production

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.