NOVELTY - A steam reforming and high temperature water gas shift process (P1) involves steam reforming a hydrocarbon during a reforming cycle in a pressure swing reformer at high pressure to provide a synthesis gas stream, subjecting the stream to a high temperature water-gas shift reaction to provide a multi component product gas stream enriched in hydrogen, and separating high pressure hydrogen.    USE - For producing high pressure hydrogen (claimed), for refinery processes, for direct use as a fuel and for distribution.    ADVANTAGE - The process utilizes pressure swing reforming in a unique and thermally efficient way.    DETAILED DESCRIPTION - A steam reforming and high temperature water gas shift process (P1) involves steam reforming a hydrocarbon during a reforming cycle in a pressure swing reformer (f1) at high pressure to provide a synthesis gas stream (g1) at a temperature substantially in the range of temperatures used in the high temperature water-gas shift reaction; subjecting (g1) to a high temperature water-gas shift reaction to provide a multi component product gas stream (g2) enriched in hydrogen; separating high pressure hydrogen from (g2); combusting a fuel and oxygen in the regeneration cycle of (f1) at a pressure lower than that used in the reforming cycle to provide temperature conditions sufficient for the reforming cycle and to generate a flue gas exiting (f1). An INDEPENDENT CLAIM is included for production (P2) of high pressure hydrogen involving    (a) passing A feed stream under high pressure conditions and comprising a hydrocarbon and stream through a first zone containing packing materials and a steam reforming catalyst at an elevated temperature to produce a high pressure synthesis gas stream;    (b) passing at least a portion of the synthesis gas stream of step (a) through the first end of a second zone containing bed packing materials at a temperature lower than the first zone to transfer 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. The steps (a) and (b) are conducted to provide a synthesis gas at the second end of the second zone in 220 - 400degreesC;    (c) removing substantially all of the high pressure synthesis gas from the second zone and introducing the gas into a high temperature water-gas shift reaction zone to provide a gas stream enriched in hydrogen;    (d) passing the hydrogen enriched gas stream through a hydrogen separation zone (z1) to separate high pressure hydrogen;    (e) removing high pressure hydrogen from the separation zone; and    (f) introducing a fuel and an oxygen containing gas at a pressure lower than in step (a) into the second end of the second zone for combustion and passage through the second and first zone by heating the first zone to reforming temperatures and creating a flue gas which exits through the first end of the first zone.