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A process for the purification of a gaseous hydrogen flow containing one or more gaseous impurities from the group consisting of carbon monoxide, water vapor, nitrogen, H2S, chlorine, C1-C3 light alcohols, ammonia, carbon dioxide and linear, branched or cyclic hydrocarbons, saturated and unsaturated

A process for the purification of a gaseous hydrogen flow containing one or more gaseous impurities from the group consisting of carbon monoxide, water vapor, nitrogen, H2S, chlorine, C1-C3 light alcohols, ammonia, carbon dioxide and linear, branched or cyclic hydrocarbons, saturated and unsaturated, C1-C8. The hydrogen flow is placed in contact with a porous carbonated adsorbent having an adsorption limit volume (W0) and an energy parameter of (E0) according to the Dubinin relationship, such that:0.18 ml.g-1.ltoreq.W0.ltoreq.1.50 ml.g-1and15 kJ.mole-1.ltoreq.E0.ltoreq.45 kJ.mole-1.The porous carbonated adsorbent is selected from active carbons. The gas rich in hydrogen is a reforming gas, an electrolysis gas, a gas from ammonia cracking or from alcohol cracking.

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1. Process for the purification of a flow of gaseous hydrogen containing at least one gaseous impurity selected from the group consisting of carbon monoxide, water vapor, nitrogen, H2S, carbon dioxide, chlorine, C1-3 light alcohols, ammonia and linear, branched or cyclic hydrocarbons, saturated or u

1. Process for the purification of a flow of gaseous hydrogen containing at least one gaseous impurity selected from the group consisting of carbon monoxide, water vapor, nitrogen, H2S, carbon dioxide, chlorine, C1-3 light alcohols, ammonia and linear, branched or cyclic hydrocarbons, saturated or unsaturated, C1-C8, which process comprises contacting the flow of gaseous hydrogen to be purified with at least one porous carbonated adsorbent having a limit adsorption volume (W0) and an energy parameter (E0) according to the Dubinin relationship wherein:0.18 ml.g-1.ltoreq.W0.ltoreq.1.50 ml.g-1 and15 kJ.mole-1.ltoreq.E0.ltoreq.45 kJ.mole-1.