Two-stage PSA/VSA to produce H2 with CO2 capture via steam methane reforming (SMR). (11th October 2018)

• Record Type: Journal Article
• Authors: Shi, Wenrong; Yang, Huawei; Shen, Yuanhui; Fu, Qiang; Zhang, Donghui; Fu, Bo
• Is Part Of: International journal of hydrogen energy. Volume 43:Number 41(2018)
• Page Start: 19057
• Page End: 19074
• Publication Date: 2018-10-11
• Subjects: PSA/VSA -- H2 production -- CO2 capture -- Steam methane reforming; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2018.08.077
• Languages: English
• ISSNs: 0360-3199

Abstract

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. Highlights: A ten-bed PSA process was designed to produce high purity H2 from SMR. A three-bed VSA process was investigated to recover CO2 from tail gas simultaneously. The effects of different operating parameters were assessed. The P/VSA could improve the purity and recovery of H2 and CO2 .