Process for producing hydrogen using a carbon-containing adsorbent which has selected dubinin parameters

摘要

PSA process for the purification of hydrogen involves careful selection of an activated carbon material used in association with another adsorbent, preferably a zeolite. Process for the purification of a gaseous flow of hydrogen containing impurities including CO, water, N2, H2S, CO2, Cl2, 1 - 3C alcohols, NH3 and 1 - 8C hydrocarbons, in which the hydrogen is contacted with a carbonaceous adsorbent characterized by a limiting adsorption vol(Wo) and energy parameter (Eo) according to the Dubinin relation with:- Wo greater or equal to 0.18 ml/g and less than or equal to 1.50 ml/g ; and Eo greater or equal to 15 kJ/mole and less than or equal to 45 kJ/mole.