US 11,850,553 B2
System for pre-purification of a feed gas stream
Ralph J. Mancini, Danbury, CT (US); Cem E. Celik, Grand Island, NY (US); Matthias Grahl, Munich (DE); Arthur C. Selover, Town of Tonawanda, NY (US); Sesha Hari Vemuri, Tonawanda, NY (US); and Helko Schneider, Wolfratshausen (DE)
Assigned to PRAXAIR TECHNOLOGY, INC., Danbury, CT (US)
Filed by Ralph J. Mancini, Danbury, CT (US); Cem E. Celik, Grand Island, NY (US); Matthias Grahl, Munich (DE); Arthur C. Selover, Town of Tonawanda, NY (US); Sesha Hari Vemuri, Tonawanda, NY (US); and Helko Schneider, Wolfratshausen (DE)
Filed on Jan. 29, 2021, as Appl. No. 17/264,457.
Claims priority of provisional application 63/067,539, filed on Aug. 19, 2020.
Prior Publication US 2022/0054975 A1, Feb. 24, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. B01D 53/86 (2006.01); B01D 53/04 (2006.01); B01D 53/047 (2006.01); B01D 53/26 (2006.01); B01D 53/28 (2006.01)
CPC B01D 53/869 (2013.01) [B01D 53/047 (2013.01); B01D 53/0462 (2013.01); B01D 53/261 (2013.01); B01D 53/28 (2013.01); B01D 53/864 (2013.01); B01D 53/8671 (2013.01); B01D 2253/104 (2013.01); B01D 2253/108 (2013.01); B01D 2255/1023 (2013.01); B01D 2255/2073 (2013.01); B01D 2255/20761 (2013.01); B01D 2255/40 (2013.01); B01D 2255/9025 (2013.01); B01D 2257/108 (2013.01); B01D 2257/502 (2013.01); B01D 2257/504 (2013.01); B01D 2257/80 (2013.01); B01D 2259/404 (2013.01); B01D 2259/4061 (2013.01); B01D 2259/414 (2013.01)] 22 Claims
OG exemplary drawing
 
1. A pre-purifier unit for an air-separation unit comprising:
a vessel having an inlet configured for receiving a stream of compressed feed air and an outlet configured to direct a purified stream substantially free of water, carbon dioxide, carbon monoxide and hydrogen to another part of the air separation unit;
a first purification section disposed within the vessel comprising at least one layer of adsorbent configured to remove water and carbon dioxide from the compressed feed air stream and yield a dry feed stream substantially free of water and carbon dioxide;
a second purification section disposed within the vessel downstream of the first purification section, the second purification section comprising (i) a first layer of manganese oxide and copper oxide containing catalyst configured to remove at least some of the carbon monoxide and hydrogen from the dry feed stream and produce a first intermediate effluent, (ii) a second layer disposed downstream of the first layer configured to remove water and carbon dioxide from the intermediate effluent and produce a second intermediate effluent, and (iii) a third manganese oxide and copper oxide containing catalyst layer disposed downstream of the second layer and is configured to remove hydrogen from the second intermediate effluent to yield an intermediate purified stream substantially free of hydrogen and carbon monoxide; and
a third purification section disposed within the vessel downstream of the second purification section and comprising at least one other layer of adsorbent configured to remove water and carbon dioxide from the intermediate purified stream and yield the purified stream substantially free of water, carbon dioxide, carbon monoxide and hydrogen.