Mode lling And Simulation Of Mass Transfer In Tubular Gas–Liquid Membrane

This Study mainly deals with modelling and simulation of turbulent flow conditions in gas absorption by liquid phase in a membrane contactor using computational fluid dynamics (CFD). For this purpose, single tube membrane contactor has been considered. The model has been based on non-wetted mode , in which the gas mixture has filledmembrane pores, for counter current gas–liquid contact. Axial and radial diffusion inside the tube, through the membrane, and within the shell side of the membrane contactor have been considered. The simulation results have been compared with those of CO2 absorption in water with laminar flow and similar physical conditions. Both predictions are in qualitative agreement with each other. However, the removal efficiency in turbulent flow conditions is much more than that of laminar flow conditions. It is also indicated that CO2 removal from gas mixture is decreased with increasing gas volumetric flow rate. On the other hand, increasing liquid volumetric flow rate increases the removal efficiency.

Keywords:

Mass transfer , membrane contactor , turbulent flow , modelling , simulation