Utilization of Dual-PSA Technology for Natural Gas Upgrading and Integrated CO2 Capture

In this study, we have considered Pressure Swing Adsorption (PSA) technology natural gas purification and integrated CO2 capture. We present the utilization of Dual-PSA technology for obtaining pipeline-quality methane and integrated CO2 capture. In the initial simulation example, a binary stream of 10% CO2 – 90% CH4 could be separated into two streams where the CH4-rich stream has a purity of 98% and the CO2-rich stream has a purity of 91%. The overall recovery of methane is higher than 99% and unit productivity of the Dual-PSA is 3.3 mol CH4/(kgads.h).