Plural absorption stages for hydrogen purification

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

C - Chemistry, Metallurgy

01

B

23/315

C01B 3/48 (2006.01) B01D 53/14 (2006.01) C01B 3/38 (2006.01) C01B 3/52 (2006.01)

Patent

CA 1269819

"PLURAL ABSORPTION STAGES FOR HYDROGEN PURIFICATION" 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 H2 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 CO2, 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 CO2.

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