Technical hydrogen

Details Technical hydrogen Technical hydrogen

1986-05-30

1988-10-18

Doll, John

Chemistry of inorganic compounds

Hydrogen or compound thereof

Elemental hydrogen

55 25, 55 68, 423652, 423653, C01B 113

Patent

active

047786701

ABSTRACT:
A PSA based process for the production of technical hydrogen wherein the feed to the PSA contains nitrogen and carbon monoxide with a hydrogen/(carbon monoxide+nitrogen) volume ratio in the range 1.2 to 4 and a nitrogen/carbon monoxide volume ratio of at least 10. The adsorption step in the PSA stage is stopped when the integrated nitrogen content of the unadsorbed product is 1 to 10% volume.
The raw gas fed to the PSA is preferably made by primary reforming a hydrocarbon feedstock with steam followed by secondary reforming followed by shift and water removal: the heat required for primary reforming is preferably supplied by the secondary reformer outlet gas.
The PSA waste gas is preferably combusted in a gas turbine driving the secondary reformer air compressor.

REFERENCES:
patent: 4264567 (1981-04-01), Pinto
patent: 4325931 (1982-04-01), Lewis
patent: 4512780 (1985-04-01), Fuderer
patent: 4553981 (1985-11-01), Fuderer
patent: 4592860 (1986-06-01), Fuderer
patent: 4695442 (1987-09-01), Pinto et al.

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