| In this paper, an experimental research by hollow-fiber membrane-based absorption system was carried out. The hollow-fiber polypropylene microporous membrane (HFPPM) modules were used as membrane contactors and the aqueous solution of potassium salt of taurine and its compound solvent were chosen as the absorbent. The effects of various factors, including concentration of absorbent and feeding gas, temperature of operation, flow velocity of absorbent and feeding gas on the CO2 absorption efficiency were investigated. And the active materials of different concentration, including 2-Amido-2-methyl-1-propylacohol and Piperazine, were added in the absorbent, of which the effect has also been investigated. The mathematical model of mass transfer in the membrane absorber was derived. The solution method for nonlinear partial differential equations was given by using MATLAB. CO2 concentration in liquid outlet was predicted by mathematical model of kinetics of mass transfer. The results show that the separation of CO2 by membrane-based potassium salt of taurine and its compound absorbent is of quicker mass transfer velocity and higher separated efficiency. The compound absorbent with little Piperazine represents best in all species of absorbent. The CO2 absorptivity of compound absorbent with potassium salt of taurine and 2-Amido-2-methyl-1-propylacohol is lower than the aqueous solution of pure potassium salt of taurine. The results from the model by MATLAB are in good agreement with the experimental data. And it indicates that the application of MATLAB is effective and feasible. The application of MATLAB provides a good way to simulate and optimize membrane gas separation. |
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