Hydrogen production method

Details Hydrogen production method Hydrogen production method

2011-04-26

2011-04-26

Mayes, Melvin C (Department: 1732)

Chemistry of inorganic compounds

Hydrogen or compound thereof

Elemental hydrogen

C423S655000

Reexamination Certificate

active

07931888

ABSTRACT:
A method of producing a hydrogen product stream in which a steam stream is reacted with a hydrocarbon containing stream within a steam methane reformer. The resulting product stream is subjected to a water gas shift reaction and then to pressure swing adsorption to produce the hydrogen product stream. The hydrocarbon stream is alternatively formed from a first type of feed stream made up of natural gas, refinery off-gas, naphtha or synthetic natural gas or combinations thereof and a second type that is additionally made up of a hydrogen and carbon monoxide containing gas. During use of both of the types of feed streams, the flow rate of the steam stream is not substantially changed and reformer exit temperatures of both the reactant and the flue gas side are held essentially constant.

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Gray et al., “Polygeneration of SNG, Hydrogen, Power, and Carbon Dioxide from Texas Lignite”, Mitretek Report, 2004.
Broadhurst et al., “Effects of Hydrocarbon Feed Type on Operating Costs and Environmental Impact on a Steam Reforming Based Hydrogen Plant”, International Topical Conference on Refinery Processing, 2005.
Schmetz et al., “Hydrogen from Coal Program”, draft report prepared by NETL, U.S. DOE, 2005.

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