Separation of CO2 from wet-process desulfurized flue gas by membrane absorption has been the subject of many studies

but investigations on the membrane process are usually carried out under laboratory conditions using pure single gases or binary gas.Under real conditions

wet-process desulfurized flue gas contains impurities

such as fine particles

H2O and gaseous pollutant

which will influence membrane performance.In this paper

a hollow fiber membrane contactor was put into operation in the wet-process desulfurized flue gas and the effects of fine particles

water vapor and SO2 on the performance and integrity of the membrane were investigated.The results show that fine particles deposited on the membrane surface reduce CO2 absorption efficiency

and the stability of membranes can be improved significantly by decreasing the concentration of fine particles in the flue gas.The competitive adsorption of SO2 is not obvious since its content is much lower than that of CO2.It will be helpful to eliminate the water vapor by drying with back blowing gas after some period of time

so that the membrane module can work with a good stability.