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

作　　者：Huiru Li Zuwei Liao Jingyuan Sun Binbo Jiang Jingdai Wang Yongrong Yang 

机构地区：[1]Zhejiang Provincial Key Laboratory of Advanced Chemical Engineering Manufacture Technology,College of Chemical and Biological Engineering,Zhejiang University,Hangzhou 310027 China [2]State Key Laboratory of Chemical Engineering,College of Chemical and Biological Engineering,Zhejiang University,Hangzhou 310027 China

出　　处：《Chinese Journal of Chemical Engineering》2019年第8期1870-1878,共9页中国化学工程学报（英文版）

基　　金：The financial support from the project of National Natural Science Foundation of China(21822809&61590925);the National Science Fund for Distinguished Young Scholars(21525627)

摘　　要：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 purgeto-feed ratio(P/F ratio) on process performance were investigated to design a PSA process with more than99.95% 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.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 purgeto-feed ratio（P/F ratio） on process performance were investigated to design a PSA process with more than99.95% 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.

关 键 词：Hydrogen ADSORPTION PURITY Recovery FEED composition 

分 类 号：O64[理学—物理化学]