Plural absorption stages for hydrogen purification

Details Plural absorption stages for hydrogen purification Plural absorption stages for hydrogen purification

1984-10-19

1990-01-02

Doll, John

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Hydrogen component

55 68, 423650, C01B 126, C01B 324

Patent

active

048911879

ABSTRACT:
For the production of hydrogen, hydrocarbons are subjected to a partial oxidation, the resulting gaseous fraction is fed to a CO shift conversion and the acid gases are removed by absorption. To obtain a H.sub.2 product with a purity of at least 99% by volume without reduction in yield, sulfur compounds are removed in a first absorption stage with an organic, physical solvent; the resultant desulfurized gas is subjected to a selective catalytic oxidation with oxygen to selectively convert CO to CO.sub.2, and resultant desulfurized CO-depleted gas is treated in a second absorption stage with preferably the same scrubbing agent as first absorption stage to remove CO.sub.2.

REFERENCES:
patent: 3382044 (1968-05-01), Cromeans
patent: 4213954 (1980-07-01), Pinto
patent: 4238468 (1980-12-01), Bonacci et al.
patent: 4409196 (1983-10-01), Skinner et al.
"Ammonia Plant Productivity Boosted by Selective CO Oxidation," C. M. Buckthorp, Nitrogen, May/Jun. 1978, pp. 34-39.

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