Bulk separation andpurification of coal gas by using pressure swing adsorption

Young Woo You, Dong Geun Lee, Seung Moon Lee, Ki Hyun Kim, Seong Man Kim, Chang Ha Lee

Research output: Chapter in Book/Report/Conference proceedingConference contribution


Globalwarming, resulting from greenhouse gases emissions especially CO 2,is a big issue facing the earth. And the steel and iron industry is known asone of major global warming gas emission industries. One of the options for solvingthe global warming problem in steel and iron industry is to recover H 2 from coal gas as a clean energy resource. However, coal gas from iron and steel processes contains relatively low H 2 fraction (38 vol.%) and high CO 2 fraction (50% vol.%) compared with reforming gas or coke oven gas. Therefore, bulk separation and purification of coal gas should be performed to use hydrogen as a combustion fuel or fuel for fuel cell. In this study, layered two-bed and four-bed PSA processes were investigated experimentally and theoretically for the H 2 recovery from coal gas (H 2/CO/CO 2/CH 4/N 2;38 H 2 vol.%). The four-bed PSA process could produce H 2 with purity of 96-99.5% and recovery of 71-85%. The recovered H 2 product for fuel cell should contain carbon monoxide below 10 ppm because of CO poison on anode catalysts. Therefore, purification by using PSA and PVSA processes with single adsorbent bed orlayered bed were performed experimentally to remove CO and recover high purity H 2(less than 10 ppm CO) from hydrogen-rich mixture. Two types of feed wereused in this study: Feed1 is 99% H 2 mixture containing 0.1% CO concentration (H 2/CO/CO 2/N 2 mixture), Feed2 is 95% H 2 mixture containing 0.3% CO concentration (H 2/CO/CO 2/CH 4/N 2 mixture). In the PSA experiments using activated carbon, carbon monoxide in the feed could be removed to 1.1 ppm in the product with 99.99%+ H 2 purity and 80.0% recovery in Feed 1 and 6.7 ppm with 99.96% H 2 purity and 78.4% recovery in Feed 2 under 6.5 bar adsorption pressure. In addition, the effects of P/F ratio and adsorption pressure were investigated experimentally. PVSA process applied to Feed1 gave higher performance result than PSA process, but the vacuum cost should be evaluated.

Original languageEnglish
Title of host publication11AIChE - 2011 AIChE Annual Meeting, Conference Proceedings
Publication statusPublished - 2011
Event2011 AIChE Annual Meeting, 11AIChE - Minneapolis, MN, United States
Duration: 2011 Oct 162011 Oct 21

Publication series

Name11AIChE - 2011 AIChE Annual Meeting, Conference Proceedings


Other2011 AIChE Annual Meeting, 11AIChE
Country/TerritoryUnited States
CityMinneapolis, MN

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)


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