US 12,440,800 B2
Separation and recovery system and method of hydrogen from coke oven gas(COG) in steel industry
Jeong Hoon Kim, Daejeon (KR); Bo Ryoung Park, Daejeon (KR); and Ho Cheol Kang, Daejeon (KR)
Assigned to KOREA RESEARCH INSTITUTE OF CHEMICAL TECHNOLOGY, Daejeon (KR)
Filed by KOREA RESEARCH INSTITUTE OF CHEMICAL TECHNOLOGY, Daejeon (KR)
Filed on Oct. 24, 2022, as Appl. No. 17/972,127.
Claims priority of application No. 10-2021-0146984 (KR), filed on Oct. 29, 2021.
Prior Publication US 2023/0132426 A1, May 4, 2023
Int. Cl. B01D 53/04 (2006.01); B01D 51/10 (2006.01); B01D 53/047 (2006.01); B01D 53/22 (2006.01); B01D 71/68 (2006.01)
CPC B01D 53/229 (2013.01) [B01D 51/10 (2013.01); B01D 53/0446 (2013.01); B01D 53/0462 (2013.01); B01D 53/047 (2013.01); B01D 53/0476 (2013.01); B01D 53/226 (2013.01); B01D 71/68 (2013.01); B01D 2253/102 (2013.01); B01D 2253/108 (2013.01); B01D 2253/116 (2013.01); B01D 2253/25 (2013.01); B01D 2256/16 (2013.01); B01D 2257/102 (2013.01); B01D 2257/304 (2013.01); B01D 2257/502 (2013.01); B01D 2257/504 (2013.01); B01D 2257/7025 (2013.01); B01D 2259/4146 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A system for separating and recovering hydrogen from coke oven gas (COG) in steel industry at a concentration of 99.9 volume % or more with a recovery rate of 95% or more, comprising the following units:
a preprocessing unit for removing impurities including tar, moisture, oil, hydrogen sulfide and dust from coke oven gas (COG) containing hydrogen, methane, carbon monoxide, carbon dioxide, nitrogen, light hydrocarbons and impurities comprising tar, moisture, oil, hydrogen sulfide and dust;
a membrane separation unit comprising a plurality of separation membrane packages in which at least two separation membrane packages that selectively permeate hydrogen are connected in series, and a single compressor connected to any one of the plurality of separation membrane packages that produces a hydrogen-enriched gas stream at a concentration of at least 95 volume % by recovering hydrogen from the coke oven gas (COG) with a recovery rate of 90% or more through membrane separation of the coke oven gas (COG) treated in the preprocessing unit; and
a first adsorption unit for separating and recovering hydrogen from the coke oven gas (COG) by contacting the hydrogen-enriched gas stream with a first adsorbent,
wherein the gas stream discharged from the first adsorption unit has a circulation structure supplied to a front end of the compressor.