CO_2 Desorption by Hydrophilic PTFE Hollow Fiber Membranes via a Membrane Flash Process

摘要

In this study, hydrophilic PTFE hollow fiber membranes were prepared and applied for CO_2 desorption via a membrane flash process, which is a new CO_2 desorption process by utilizing waste thermal energy. The methyldiethanolamine was selected as the absorbent. Effects of the flashing temperature, flashing pressure, rich solution flow rate and MDEA concentration on CO_2 release ratio and CO_2 desorption flux were deeply investigated. The results show that flashing temperature is positive to the CO_2 release ratio and CO_2 desorption flux. However, the flashing pressure, rich solution flow rate and MDEA concentration are negative to the CO_2 release ratio and CO_2 desorption flux.