The Co_2 Removal of Flue Gas Using Hollow Fiber Membrane Contactor: A Comprehensive Modeling and New Perspectives

In this study, a novel hollow fiber membrane contactor (hfmc) under a nonwet condition was numerically explored by cfd techniques based on the finite element method to capture co_2 from the ch_4/co_2 gas mixture. a new design, such as a shell and tube heat exchanger with baffles, was proposed. the mea, dea, and tea, as different amines solutions, were selected as the liquid solvents. a co_2 containing gas mixture and amine solution were passed in the shell side and the tube side of the membrane contactor, respectively. the simulation findings indicated a good agreement with the reported experimental data demonstrating that such a model would evaluate the effects of different parameters during the hfmc system. specifically, the results showed that the baffles’ presence improved the separation efficiency due to the increased residence time on the shell side. the results also indicated that the mea solution had the highest co_2 absorption. in the new design (shell and tube heat exchanger with baffles), the rising solvent inlet velocity, decreasing gas velocity, and countercurrent flow pattern positively affected separation efficiency.