抄録
As an alternative technology for CO2 recovery from the flue gas, membrane contactor-stripper hybrid process was studied. Porous polytetrafluoroethylene(PTFE), polyvinylidenefluoride(PVDF) and polypropylene(PP) hollow fiber modules were used as membrane contactors and their performance was compared with a conventional packed column. The CO2 was removed by the hollow fiber membrane contactor using monoethanolamine (MEA) solution as the absorbent. PVDF module with asymmetric pore structure showed the most stable gas-liquid interface and the highest removal efficiency among the three different hollow fiber membrane modules used. Mass transfer resistance model for the CO2 absorption across the hollow fiber membrane was proposed and analyzed. In application of large-scale hollow fiber membrane contactor, the hybrid process was successfully operated and recovered CO2 with a lower cost.
