Concentration Polarization of Membrane Absorption Process of Acidic Gases
酸性气体膜吸收过程中浓差极化

A special reaction system was proposed to investigate the mechanism of the mass transfer process in membrane absorption process. The mass transfer resistance of this process was calculated by using hydrophobic PP hollow fiber, for either SO2/air-NaOH system or CO2/air-NaOH system. Different phenomena in these two systems were discussed. Since the reaction mechanism of SO2-NaOH system and CO2-NaOH system is different, SO2 and CO2 mass transfer in solution side is different. The diffusion of different ions and the concentration polarization in liquid phase boundary layer, instead of the ionization effect, was the reason of deviation in SO2 absorption process. The influences of liquid phase velocity and the concentration of absorbent were discussed in this study.