Adsorption method for producing hydrogen and device for carrying out said method

摘要

A feedstock hydrogen-enriched gas ( 3 ) is supplied to a PSA purification unit ( 1 ) which delivers pure hydrogen at a production output ( 4 ) and a hydrogen-deficient gas at a residual output. Said hydrogen-deficient gas is compressed ( 9 ) and injected into a line ( 10 ) wherein a gaseous combustible mixture circulates whose part (12) is extracted upstream of the PSA unit ( 1 ), compressed ( 13 ) and reinjected into said feedstock of the PSA unit ( 1 ). Said invention is used, in particular for petrochemical sites.