US 9,808,755 B2
Sour pressure swing adsorption process
Shubhra Jyoti Bhadra, Macungie, PA (US); Andrew David Wright, Guildford (GB); Jeffrey Raymond Hufton, Fogelsville, PA (US); Jeffrey William Kloosterman, Allentown, PA (US); Fabrice Amy, Macungie, PA (US); and Edward Landis Weist, Jr., Macungie, PA (US)
Assigned to Air Products and Chemicals, Inc., Allentown, PA (US)
Filed by AIR PRODUCTS AND CHEMICALS, INC., Allentown, PA (US)
Filed on Jul. 24, 2015, as Appl. No. 14/808,069.
Prior Publication US 2017/0021301 A1, Jan. 26, 2017
Int. Cl. B01D 53/047 (2006.01); C01B 3/56 (2006.01); C01B 17/04 (2006.01)
CPC B01D 53/047 (2013.01) [C01B 3/56 (2013.01); C01B 17/0404 (2013.01); B01D 2256/16 (2013.01); B01D 2256/22 (2013.01); B01D 2257/304 (2013.01); B01D 2257/504 (2013.01); B01D 2257/70 (2013.01); B01D 2259/40056 (2013.01); B01D 2259/4067 (2013.01); B01D 2259/41 (2013.01); C01B 2203/0283 (2013.01); C01B 2203/042 (2013.01); C01B 2203/043 (2013.01); C01B 2203/047 (2013.01); C01B 2203/048 (2013.01); C01B 2203/0475 (2013.01); C01B 2203/0485 (2013.01); C01B 2203/061 (2013.01); C01B 2203/068 (2013.01); C01B 2203/86 (2013.01); Y02C 10/08 (2013.01); Y02P 30/30 (2015.11)] 18 Claims
OG exemplary drawing
 
1. A method comprising:
(a) gasifying a carbonaceous feedstock to form a gasified stream comprising H2S, CO2, CO and H2;
(b) converting at least a portion of the CO in the gasified stream to CO2 and H2 using a water-gas shift reaction, resulting in a sour syngas stream;
(c) introducing the sour syngas stream into a sour pressure swing adsorption (SPSA) system having a plurality of adsorber beds;
(d) performing a cyclic PSA process using the SPSA system comprising the following steps:
(i) pressurizing a first bed of the plurality of adsorber beds to a first pressure;
(ii) feeding the sour syngas stream into an inlet end of the pressurized first bed and discharging a first gas stream from an outlet end of the first bed;
(iii) after the feeding step, introducing a rinse gas comprising at least 99 mol % N2 into the first bed, the rinse gas being from a source other than directly from another of the plurality of adsorber beds;
(e) removing a product stream from the SPSA system, the product stream having a greater concentration of H2 than the sour syngas stream and comprising at least 80 mol % H2 and at least 10 mol % N2;
(f) removing a tail gas stream from the SPSA system, the tail gas stream having a greater concentration of CO2 and H2S than the sour syngas stream; and
(g) separating the tail gas stream into an H2S-enriched stream and a H2S-depleted stream using an acid gas enrichment (AGE) system.