Process and apparatus for hydrogen purification

B - Operations – Transporting – 01 – J

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B01J 20/00 (2006.01) B01D 53/047 (2006.01) C01B 3/56 (2006.01)

Patent

CA 2511660

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.

Cette invention concerne un ensemble optimum d'adsorbants à utiliser dans des procédés H 2 -PSA. Chaque lit d'adsorbant est divisé en quatre régions; la région 1 contient l'adsorbant pour enlever l'eau ; la région 2 contient un mélange des adsorbants forts et faibles pour enlever des impuretés en vrac telle que le Co 2 ; la région 3 contient une densité en vrac élevée (de > 38 lb¿m?/ft?3¿) d'adsorbant pour enlever le Co2 restant; et la majeure partie de CH 4 et de CO actuelle présente dans les mélanges alimentés contenant du H 2 ; et la région 4 contient l'adsorbant possédant des constantes élevées de la loi de Henry pour le nettoyage final de N 2 et d'impuretés résiduelles afin de produire de l'hydrogène à la pureté élevée recherchée.

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