NOVELTY - Power is produced, under conditions that facilitate carbon dioxide capture, by introducing part of separated hydrogen as fuel to a combustion zone of a gas turbine to produce power where only carbon dioxide produced is that contained in a gas mixture obtained after a water gas shift reaction, thus producing power under conditions that facilitate carbon dioxide capture.    USE - For producing power under conditions that facilitate CO2 capture.    ADVANTAGE - The method is operable under conditions in which only minor amounts of CO2 are emitted from the combustion zone of the gas turbine and that the only CO2 produced is that contained in the gas obtained after the water gas shift reaction. It maximizes one of power or hydrogen production under conditions that facilitate CO2 capture.    DETAILED DESCRIPTION - Production of power, under conditions that facilitate carbon dioxide (CO2) capture, includes passing a feed stream under high pressure conditions, and comprising a hydrocarbon and steam, through a first zone containing packing materials and a steam reforming catalyst at an elevated temperature to produce a high pressure synthesis gas stream; passing a portion of the synthesis gas stream through the first end of a second zone containing bed packing materials at a temperature lower than the first zone thus transferring sensible heat from the product to the packing material in the second zone and providing a high pressure synthesis gas at a temperature approaching that of the packing material at the second end, where the first and second passing steps are conducted at conditions adequate to provide a synthesis gas at the second end of the second zone in 200-650degreesC; removing all of the high pressure synthesis gas from the second zone and introducing the gas into a water-gas shift reaction zone to provide a gas stream containing CO2 and enriched in hydrogen; passing the hydrogen-enriched gas stream through a hydrogen separation zone to separate high pressure hydrogen from CO2; removing the high pressure hydrogen-containing gas stream from the separation zone; removing the CO2 containing gas stream from the separation zone; and introducing part of the separated hydrogen as fuel to a combustion zone of a gas turbine to produce power where the only CO2 produced is that contained in the gas mixture obtained after the water gas shift reaction, thus producing power under conditions that facilitate CO2 capture.    An INDEPENDENT CLAIM is also included for a process of producing hydrogen, comprising steam reforming a hydrocarbon in a pressure swing reformer to produce synthesis gas which is subjected to water gas shift reaction to form a gas mixture enriched in hydrogen (H2) and including CO2 and where the hydrogen is separated from the gas mixture; and combusting part of the separated hydrogen with air to power a gas turbine thus producing power in which the only CO2 produced is that contained in the gas mixture obtained after the water gas shift reaction and in which the capture of CO2 is thus facilitated.