Affiliation:
1. University of Science and technology Beijing
Abstract
Vacuum pressure swing adsorption (VPSA) process with vacuum exhaust step for concentrating ventilation air methane (VAM) was studied experimentally. The effect of vacuum exhaust ratio on methane concentration and recovery are investigated. The results shows that vacuum exhaust step can increase the methane concentration of product gas without increasing pressure. As the ratio increases, the concentrations of methane in both product and effluent firstly increase, and then reach steady state after a certain vacuum exhaust ratio. The process of vacuum exhaust gas recovered can increase methane recovery and concentration, but it will decrease the methane concentration of product when the vacuum exhaust ratio is lower than 1.0. The results could provide reference for the industrial application in VAM enrichment.
Publisher
Trans Tech Publications, Ltd.
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