Two-stage PSA/VSA to produce H2 with CO2 capture via steam methane reforming (SMR) |
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| Authors: | Wenrong Shi Huawei Yang Yuanhui Shen Qiang Fu Donghui Zhang Bo Fu |
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| Affiliation: | 1. State Key Laboratory of Chemical Engineering, Collaborative Innovation Center of Chemical Science and Engineering, Research Center of Chemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China;2. School of Chemistry and Materials Science, Ludong University, Yantai 264025, China;3. College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, China |
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| Abstract: | A two-stage pressure/vacuum swing adsorption (PSA/VSA) process was proposed to produce high purity H2 from steam methane reforming (SMR) gas and capture CO2 from the tail gas of the SMR-H2-PSA unit. Notably, a ten-bed PSA process with activated carbon and 5A zeolite was designed to produce 99.99+% H2 with over 85% recovery from the SMR gas (CH4/CO/CO2/H2 = 3.5/0.5/20/76 vol%). Moreover, a three-bed VSA system was constructed to recover CO2 from the tail gas using silica gel as the adsorbent. CO2 product with 95% purity and over 90% recovery could be attained. Additionally, the effects of various operating parameters on the process performances were investigated in detail. |
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| Keywords: | PSA/VSA Steam methane reforming |
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