“…To improve the economic advantages of the membrane system for CO 2 capture, a combination of adsorption or a cooling process within the membrane is proposed and is proved to provide an economic advantage for CO 2 capture over using the MEA adsorption process alone (Skorek-Osikowska et al, 2012). Furthermore, sweep gas is often used to enhance hydrogen recovery (Ku et al, 2011), which improves the driving force for H 2 recovery and reduces the hydrogen purity.…”