Integration of hydrogen and power generation using pressure swing reforming

A method for producing power under conditions that facilitate CO2 capture, said method comprising:

• (a) producing a synthesis gas by a pressure swing reforming process comprising a reforming stage and a regeneration stage, said reforming stage method comprising:
• (i) passing a feed stream under high pressure conditions and comprising a hydrocarbon and steam through a first end of a first, reforming zone containing packing materials and a steam reforming catalyst at an elevated temperature to produce a high pressure synthesis gas stream ranging in pressure from about ten (10) atmospheres to about one hundred (100) atmospheres;
• (ii) passing substantially all the synthesis gas stream of step (a) through the first end of a second, recuperating zone, containing bed packing materials at a temperature lower than the first zone, thereby transferring sensible heat from the synthesis gas stream to the packing material in the second, recuperating zone, and providing a high pressure synthesis gas cooled to a temperature of about the packing material at the second end;
• said steps (i) and (ii) being conducted at conditions sufficient to provide a synthesis gas at said second end of said second zone in the range of about 200° C. to about 650° C. said conditions comprising:
• combined reforming and regenerative cooling steps (i) and (ii) are done at a reforming space velocity C1GHSV greater than about 1000 hr−1 calculated using a combined volume of both the first and second zones and, bed packing providing a heat transfer parameter ΔTHT between about 0.1° C. and about 500°, to produce a time-averaged level of reforming conversion of greater than about 80%;
• (iii) removing substantially all of the high pressure synthesis gas from the second zone;
• And regeneration stage method comprising:
• (iv) introducing a oxygen containing gas into the second end of the second zone, in reverse flow to steps (i) and (ii), combusting said gas and a regenerative fuel at about an interface between the recuperating zone and the reforming zone to re-heat the packing material of the first, reforming zone sufficient for the synthesis gas production of step (i);
• (v) removing a regeneratively cooled flue gas from the first end of the first zone;
• (b) Enriching and separating hydrogen from the synthesis gas by a process comprising:
• (i) introducing said synthesis gas into a water-gas shift reaction zone to provide a shifted gas stream enriched in CO2 and enriched in hydrogen;
• (ii) passing the shifted gas stream through a hydrogen separation zone to separate high pressure hydrogen from CO2;
• (iii) removing the high pressure hydrogen-containing gas stream from the separation zone;
• (iv) removing the CO2 containing gas stream from the separation zone;
• and
• (c) introducing at least part of the separated hydrogen as fuel to a combustion zone of a gas turbine together with an oxidant to produce power whereby substantially the only CO2 produced is that contained in the CO2 containing gas stream from the separation zone thereby producing power under conditions that facilitate CO2 capture.