Patent ID: 8226912

Claim:
A method of treating a gaseous mixture, comprising CO 2 , H 2 , H 2 S, optionally CO, and optionally one or more additional combustible components, to obtain an H 2 or H 2 and CO product stream (H 2 /CO product stream) and a CO 2 product stream, the method comprising: separating the gaseous mixture to provide the H 2 /CO product stream and a CO 2 enriched stream, the CO 2 enriched stream containing at least one combustible component selected from H 2 S, H 2 , CO and any additional combustible components present in the gaseous mixture; obtaining a support fuel stream comprising one or more combustible components, wherein said support fuel stream is a gaseous stream derived from the production of the gaseous mixture, is a portion of the gaseous mixture, is separated from the gaseous mixture in addition to the H 2 /CO product stream and CO 2 enriched stream, is a portion of the H 2 /CO product, or is derived from the H 2 /CO product; combusting the support fuel stream, in the presence of sufficient O 2 to combust all or substantially all of the combustible component(s) present in said support fuel stream, to form a stable flame to act as the ignition source for combustion of the combustible component(s) present in the CO 2 enriched stream; contacting the CO 2 enriched stream, said flame and sufficient O 2 to combust all or substantially all of the combustible component(s) present in said CO 2 enriched stream and form a combustion effluent comprising CO 2 and the combustion product(s) of the combustible component(s) of the support fuel and CO 2 enriched streams; and forming the CO 2 product stream from said combustion effluent.