公开(公告)号：WO2022039840A1

公开(公告)日：2022-02-24

申请号：PCT/US2021/039761

申请日：2021-06-30

Applicant: PRAXAIR TECHNOLOGY, INC.

Inventor： MANCINI, Ralph, J. ,  CELIK, Cem, E. ,  GRAHL, Matthias ,  SELOVER, Arthur, C. ,  VEMURI, Sesha, Hari ,  SCHNEIDER, Helko

IPC: B01D53/04 ,  B01D53/047 ,  B01D53/86

Abstract: A system and method of pre-purification of a feed gas stream is provided that is particularly suitable for pre-purification of a feed air stream in cryogenic air separation unit. The disclosed pre-purification systems and methods are configured to remove substantially all of the hydrogen, carbon monoxide, water, and carbon dioxide impurities from a feed air stream and is particularly suitable for use in a high purity or ultra-high purity nitrogen plant. The pre-purification systems and methods preferably employ two or more separate layers of hopcalite catalyst with the successive layers of the hopcalite separated by a zeolite adsorbent layer that removes water and carbon dioxide produced in the hopcalite layers.