Hydrogen streams

Details Hydrogen streams Hydrogen streams

C - Chemistry, Metallurgy

01

B

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C01B 3/38 (2006.01) B01D 53/047 (2006.01) C01B 3/48 (2006.01) C01B 3/56 (2006.01) C10J 3/00 (2006.01)

Patent

CA 1254749

Abstract Hydrogen streams A carbonaceous feedstock, e.g. coal or heavy oil, having a low hydrogen to carbon atomic ratio is partially oxidised using air, or oxygen enriched or depleted air, to form a crude gas which is subjected to catalytic shift and excess steam removal. Carbon dioxide and nitrogen are then removed from the resultant raw gas, which has a hydrogen to nitrogen, plus carbon monoxide, volume ratio in the range 0.5 to 1.5 and a nitrogen content at least 10 times the carbon monoxide content, in a pressure swing adsorption process thereby producing a product gas stream containing at least 50% hydrogen and 0.5 to 40% nitrogen, by volume. The waste gas from the pressure swing adsorption may be catalytically combusted to power a turbine driving the compressor for the air or the crude gas.

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