This invention discloses an optimum set of adsorbents for use in H2-PSA processes. Each adsorbent bed is divided into four regions; Region 1 contains adsorbent for removing water; Region 2 contains a mixture of strong and weak adsorbents to remove bulk impurities like CO2; Region 3 contains a high bulk...http://www.google.es/patents/US7537742?utm_source=gb-gplus-sharePatente US7537742 - Process and adsorbent for hydrogen purification
