Modeling and simulation of mass transfer in tubular gas–liquid membrane contactors for turbulent flow conditions and comparison ofresults with laminar flow conditions

This Study mainly deals with modeling and simulation of turbulent flow conditions in gasabsorption by liquid phase in a membrane contactor using computational fluid dynamics (CFD). Forthis purpose, single tube membrane contactor has been considered. The model has been based on non-wetted mode”, in which the gas mixture has filled membrane pores, for countercurrent gas–liquid contact. Axial and radial diffusion inside the tube, through the membrane, and within the shellside of the membrane contactor have been considered. The simulation results have been comparedwith those of CO(2) absorption in water with laminar flow and similar physical conditions. Bothpredictions are in qualitative agreement with each other. However, the removal efficiency inturbulent flow conditions is much more than that of laminar flow conditions. It is also indicated thatCO(2) removal from gas mixture is decreased with increasing gas volumetric flow rate. On the otherhand, increasing liquid volumetric flow rate increases the removal efficiency.

کلیدواژه ها:

Mass transfer ، membrane contactor ، turbulent flow ، modeling ، simulation