US 12,140,374 B2
Method for producing high purity hydrogen
Shubhra Jyoti Bhadra, Macungie, PA (US); Jeffrey R. Hufton, Fogelsville, PA (US); Timothy C. Golden, Nevez (FR); Aaron Raymond Scott, Allentown, PA (US); Kamlesh Ghodasara, Borehamwood (GB); Maulik R. Shelat, Macungie, PA (US); and Garret C. Lau, New Tripoli, PA (US)
Assigned to AIR PRODUCTS AND CHEMICALS, INC., Allentown, PA (US)
Filed by Air Products and Chemicals, Inc., Allentown, PA (US)
Filed on Feb. 8, 2022, as Appl. No. 17/666,621.
Prior Publication US 2023/0304733 A1, Sep. 28, 2023
Int. Cl. F25J 3/08 (2006.01); B01D 53/047 (2006.01)
CPC F25J 3/08 (2013.01) [B01D 53/047 (2013.01); B01D 2256/16 (2013.01); F25J 2205/30 (2013.01); F25J 2205/40 (2013.01); F25J 2205/66 (2013.01); F25J 2215/10 (2013.01); F25J 2220/04 (2013.01); F25J 2260/02 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A process for the purification of a hydrogen feed stream comprising hydrogen and one or more impurities selected from the group consisting of nitrogen, argon, methane, carbon monoxide, carbon dioxide, and water, the process comprising:
cooling the hydrogen feed stream to produce a cooled hydrogen stream;
passing the cooled hydrogen stream through an online adsorber at a cryogenic temperature to adsorb the one or more impurities and produce a pure hydrogen stream and a loaded adsorber; and
passing a regeneration gas stream through the loaded adsorber at a temperature between 0 and 50° C. and ambient pressure to regenerate the loaded adsorber and produce a spent regeneration gas stream enriched in the one or more impurities; and
contacting the pure hydrogen stream with a liquid hydrogen wash stream to produce an ultra-pure hydrogen stream depleted in the one or more impurities and a liquid hydrogen effluent stream enriched in the one or more impurities.