Modelling and simulation of two-bed PSA process for separating H2 from methane steam reforming

Methane steam reforming is the main hydrogen production method in the industry. The product of methane steam reforming contains H2, CH4, CO and CO2 and is then purified by pressure swing adsorption (PSA) technology. In this study, a layered two-bed PSA process was designed theoretically to purify H2...

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Bibliographic Details
Published inChinese journal of chemical engineering Vol. 27; no. 8; pp. 1870 - 1878
Main Authors Li, Huiru, Liao, Zuwei, Sun, Jingyuan, Jiang, Binbo, Wang, Jingdai, Yang, Yongrong
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.08.2019
Zhejiang Provincial Key Laboratory of Advanced Chemical Engineering Manufacture Technology, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China%State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
Subjects
Adsorption
Feed composition
Hydrogen
Purity
Recovery
Purity
Adsorption
Hydrogen
Recovery
Feed composition
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Summary:Methane steam reforming is the main hydrogen production method in the industry. The product of methane steam reforming contains H2, CH4, CO and CO2 and is then purified by pressure swing adsorption (PSA) technology. In this study, a layered two-bed PSA process was designed theoretically to purify H2 from methane steam reforming off gas. The effects of adsorption pressure, adsorption time and purge-to-feed ratio (P/F ratio) on process performance were investigated to design a PSA process with more than 99.95% purity and 80% recovery. Since the feed composition of the PSA process changes with the upstream process, the effect of the feed composition on the process performance was discussed as well. The result showed that the increase of CH4 concentration, which was the weakest adsorbate, would have a negative impact on product purity.
ISSN:1004-9541
2210-321X
DOI:10.1016/j.cjche.2018.11.022