Patent ID: 8328889

Claim:
A process for producing syngas and power therefrom, comprising: combining one or more feedstocks and one or more oxidants in a fluidized reaction zone operated at a temperature of from 550° C. to 1,050° C. to provide a syngas, wherein the oxidant comprises air, oxygen, essentially oxygen, oxygen-enriched air, mixtures of oxygen and air, mixtures of oxygen and inert gas, or mixtures thereof; indirectly exchanging heat in a first zone from the syngas to a condensate to provide steam and a cooled syngas having a first temperature of about 815° C. or less; indirectly exchanging heat in a second zone from the syngas cooled in the first zone to at least a portion of the steam produced in the first zone to provide superheated steam and a cooled syngas having a second temperature of about 704° C. or less; indirectly exchanging heat in a third zone from the syngas cooled in the second zone to a heat transfer medium consisting essentially of water to provide the condensate and a cooled syngas having a third temperature of about 260° C. to about 427° C., wherein the cooled syngas from the second zone is introduced into the third zone at about the second temperature; supplying at least a portion of the superheated steam produced in the second zone to one or more steam turbines to produce power; and supplying at least a portion of the condensate provided in the third zone to the first zone for indirect heat exchange with the syngas therein.