US 11,731,103 B2
Hydrogen sulfide adsorbent in biogas and biogas purification system using the same
Il Hyun Baek, Daejeon (KR); and Sung Chan Nam, Daejeon (KR)
Assigned to Korea Institute of Energy Research, Daejeon (KR)
Appl. No. 16/772,155
Filed by KOREA INSTITUTE OF ENERGY RESEARCH, Daejeon (KR)
PCT Filed Mar. 27, 2020, PCT No. PCT/KR2020/004196
§ 371(c)(1), (2) Date Jun. 11, 2020,
PCT Pub. No. WO2020/262805, PCT Pub. Date Dec. 30, 2020.
Claims priority of application No. 10-2019-0076963 (KR), filed on Jun. 27, 2019.
Prior Publication US 2021/0402368 A1, Dec. 30, 2021
Int. Cl. B01J 20/06 (2006.01); B01J 20/08 (2006.01); B01D 53/04 (2006.01); B01D 53/14 (2006.01); B01D 53/52 (2006.01); B01D 53/78 (2006.01); B01J 20/20 (2006.01); B01J 20/26 (2006.01); B01J 20/28 (2006.01); C01B 3/34 (2006.01); C10K 1/00 (2006.01); C10K 1/32 (2006.01); C10L 3/10 (2006.01); B01D 53/02 (2006.01); B01D 53/18 (2006.01); B01D 53/62 (2006.01); B01J 8/02 (2006.01); C10K 1/14 (2006.01)
CPC B01J 20/08 (2013.01) [B01D 53/02 (2013.01); B01D 53/04 (2013.01); B01D 53/1425 (2013.01); B01D 53/1462 (2013.01); B01D 53/1468 (2013.01); B01D 53/1475 (2013.01); B01D 53/1493 (2013.01); B01D 53/18 (2013.01); B01D 53/52 (2013.01); B01D 53/526 (2013.01); B01D 53/62 (2013.01); B01D 53/78 (2013.01); B01J 8/02 (2013.01); B01J 20/06 (2013.01); B01J 20/20 (2013.01); B01J 20/261 (2013.01); B01J 20/28016 (2013.01); B01J 20/28019 (2013.01); C01B 3/34 (2013.01); C10K 1/004 (2013.01); C10K 1/143 (2013.01); C10K 1/32 (2013.01); C10L 3/103 (2013.01); B01D 2251/602 (2013.01); B01D 2252/20405 (2013.01); B01D 2252/20421 (2013.01); B01D 2252/20426 (2013.01); B01D 2252/20431 (2013.01); B01D 2252/20489 (2013.01); B01D 2252/504 (2013.01); B01D 2253/102 (2013.01); B01D 2253/1124 (2013.01); B01D 2256/22 (2013.01); B01D 2257/304 (2013.01); B01D 2257/504 (2013.01); B01D 2258/05 (2013.01); B01J 2220/46 (2013.01); C01B 2203/0205 (2013.01); C01B 2203/1241 (2013.01); C01B 2203/1258 (2013.01); C10L 2290/542 (2013.01)] 3 Claims
OG exemplary drawing
 
1. An adsorbent for adsorption of hydrogen sulfide in a biogas, the adsorbent comprising a metal oxide, an additive, and a binder;
wherein the additive comprises any one substance selected from the group consisting of active carbon, boehmite, zeolite, alumina, and combinations thereof;
wherein the binder comprises any one substance selected from the group consisting of polyvinyl alcohol (PVA), methyl cellulose, carbohydrate, carboxylic methyl cellulose, and combinations thereof;
wherein when the metal oxide is ZnO, the content of the additive is 7.5 to 15 parts by weight with respect to 100 parts by weight of the adsorbent, and when the metal oxide is Fe2O3, the content of the additive is 10 to 20 parts by weight with respect to 100 parts by weight of the adsorbent, and when the metal oxide is CuO, the content of the additive is 20 to 90 parts by weight with respect to 100 parts by weight of the adsorbent, and when the adsorbent is a mixture of CoO and ZnO, or a mixture of CuO, ZnO, and Al2O3, the content of the metal oxide is 5 to 95 parts by weight with respect to 100 parts by weight of the adsorbent; and
wherein the adsorbent does not include SiO2.