NOVELTY - Co-producing hydrogen/power involves supplying feed stream to hydrogen production unit (102) having gas heated reformer, water gas shift reactor, and hydrogen separator, where stream has first portion (106) of high-British thermal unit (BTU) hydrocarbon fuel and steam; forming hydrogen-containing stream and low-BTU hydrocarbon fuel stream (154) with average BTU content per standard cubic foot (SCF) lower than that of high-BTU fuel; supplying second portion of fuel and oxygen-containing gas to power generation unit (104) having combustion gas turbine engine (172); and combusting.    USE - For the co-production of hydrogen and power (claimed) used in refineries and chemical plants.    ADVANTAGE - The method has low maintenance expense. The use of pressurized air extracted from combined cycle process allows for more efficient utilization of combustion heat as compared to a conventional furnace, thus requiring less additional hydrocarbon fuel to be used within combustion unit. Also, using high-pressure combustion gas stream to supply heat to the steam reformer and shift reactor of unit allows a less expensive, more efficient, and more compact reformer to be used. The method produces hydrogen with a purity of 99.99%.    DETAILED DESCRIPTION - A process for the co-production of hydrogen and power involves supplying a feed stream to a hydrogen production unit (102) comprising a gas heated reformer, a water gas shift reactor, and a hydrogen separator, where the feed stream comprises a first portion (106) of a high-British thermal unit (BTU) hydrocarbon fuel and steam; producing a hydrogen-containing stream and a low-BTU hydrocarbon fuel stream (154) in the hydrogen production unit, where the low-BTU hydrocarbon fuel has an average BTU content per standard cubic foot (SCF) that is lower than that of the high-BTU hydrocarbon fuel; supplying a second portion of the high-BTU hydrocarbon fuel and an oxygen-containing gas to a power generation unit (104) comprising a combustion gas turbine engine (172) and combusting the second portion of high-BTU hydrocarbon fuel within the engine to generate power; extracting a portion of compressed oxygen-containing gas from the combustion gas turbine engine, passing the portion of compressed oxygen-containing gas through a compressor to increase the pressure, and directing the portion of compressed oxygen-containing gas from the compressor to a pressurized partial combustion unit contained within the hydrogen production unit; combusting the low-BTU hydrocarbon fuel and optionally, a third portion of the high-BTU hydrocarbon fuel, in the pressurized partial combustion unit to produce a high-pressure partial combustion gas stream; and using the high-pressure combustion gas stream as a heat source for the gas heated reformer. The high-BTU hydrocarbon fuel is selected from natural gas, propane, LPG, butane, pentane, and/or diesel oil. The high-BTU hydrocarbon fuel presents an average energy content of at least 150 BTU/SCF. The low-BTU hydrocarbon fuel presents an average energy content that is less than half of the average energy content of the high-BTU hydrocarbon fuel. The power generation unit comprises a combined cycle process including the combustion gas turbine engine and a heat recovery steam generator, and optionally a steam turbine operating in a Rankine cycle using at least a portion of the steam generated in the heat recovery steam generator.    An INDEPENDENT CLAIM is included for a system for the co-production of hydrogen and power comprising: a hydrogen production unit including a gas heated reformer including a reforming catalyst through which a stream comprising a high-BTU hydrocarbon fuel and steam is passed, a pressurized partial combustion unit that supplies a high-pressure combustion gas stream to the gas heated reformer, a water gas shift reactor, and a hydrogen separator that produces a low-BTU hydrocarbon fuel stream and a hydrogen containing stream; and a power generation unit including a combustion gas turbine engine for generating power, a compressed oxygen-containing gas stream that is extracted from the combustion gas turbine engine, and a compressor for further compressing the compressed oxygen-containing gas extracted from the combustion gas turbine engine, where the low-BTU hydrocarbon fuel stream and the compressed oxygen-containing gas stream are fluidly coupled with the pressurized partial combustion unit.    DESCRIPTION OF DRAWING(S) - The figure shows schematic view of a process for the co-production of hydrogen and power.    Hydrogen production unit (102)    Power generation unit (104)    First portion of fuel feed (106)    Saturator (108)    Makeup water stream (110)    Heat exchanger (112)    Saturated hydrocarbon fuel stream (114)    Low-BTU fuel stream (154)    Combustion gas turbine engine (172)