US 11,945,721 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); Quan Min Shao, Allentown, PA (US); and Vishrut Garg, Breinigsville, 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. 17/666,633.
Prior Publication US 2023/0249971 A1, Aug. 10, 2023
Int. Cl. C01B 3/56 (2006.01); B01D 53/04 (2006.01); B01D 53/047 (2006.01); B01J 20/34 (2006.01); C01B 3/50 (2006.01)
CPC C01B 3/56 (2013.01) [B01D 53/0462 (2013.01); B01D 53/047 (2013.01); B01J 20/3458 (2013.01); C01B 3/506 (2013.01); B01D 2256/16 (2013.01); B01D 2257/102 (2013.01); B01D 2257/104 (2013.01); B01D 2257/11 (2013.01); B01D 2257/502 (2013.01); B01D 2257/504 (2013.01); B01D 2257/7025 (2013.01); B01D 2257/80 (2013.01); C01B 2203/042 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A process for the purification of a hydrogen feed stream comprising hydrogen, oxygen, 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;
combining a liquid hydrogen stream with the cooled hydrogen stream to produce a combined cooled hydrogen stream;
passing the combined cooled hydrogen stream through an online adsorber at a temperature below 80 K to adsorb the one or more impurities and produce a pure hydrogen stream and a loaded adsorber; and
passing an inert regeneration gas stream through the loaded adsorber at a temperature between 0° C. and 50° C. and pressure to regenerate the loaded adsorber and produce a spent regeneration gas stream enriched in oxygen.