Liquid-liquid extraction process for gas separation from water in polymeric membrane: Mathematical modeling and simulation
Nahid Salimi,Sadegh Moradi,Afsaneh Fakhar,Seyed Mohammad Reza Razavi
Abstract
In this study, application of polypropylene hollow fiber membrane contactors for CO2 removal from water in liquid-liquid extraction (LLE) mode was simulated. For this purpose, a steady state 2D mathematical model was developed. In this model axial and radial diffusion was considered to CO2 permeation through the hollow fibers. CO2 laden water is fed at a constant flow rate into the lumen side, permeated through the pores of membrane and at the end of this process, CO2 solution in the lumen side was extracted by means of aqueous diethanolamine (DEA) and chemical reaction. The simulation results were validated with the experimental data and it was found a good agreement between them, which confirmed the reliability of the proposed model. Both simulation and experimental results confirmed the reduction in the percentage of CO2 removal by increment of feed flow rate.
