US Patent 7537742 Process and adsorbent for hydrogen purification

Patent 7537742 was granted and assigned to Praxair on May, 2009 by the United States Patent and Trademark Office.

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Is a

Patent

Patent attributes

Current Assignee

Praxair

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

7537742

Date of Patent

May 26, 2009

Patent Application Number

10540506

Date Filed

December 22, 2003

Patent Primary Examiner

‌

Edward M Johnson

Patent abstract

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 density (>38 lbm/ft3) adsorbent to remove remaining CO2; and most of CH4 and CO present in H2 containing feed mixtures; and Region 4 contains adsorbent having high Henry's law constants for the final cleanup of N2 and residual impurities to produce hydrogen at the desired high purity.