A numerical approach to the determiantion of mass transfer performances through partially wetted microporous membranes: transfer of oxygen to water

摘要

Microporous polypropylene membranes were used to transfer oxygen to water where the gas phase was pure oxygen saturated with water vapor. The experiments were maintained at a constant temperature of 37 deg C. Flow channel length, channel thickness, liquid velocity and operating pressure were changed so as to investigate their effects on mass transfer performances. A model for non-wetted pores was derived, by neglecting the gas phase film and pore resistances, and numerically solved in order to find the concentration distribution and the local average concentration in the liquid phase.