Mathematical modelling and simulation of carbon dioxide absorption from N2 using hollow fiber membrane contactor

In this work, hollow fiber membrane contactor was used to theoretically study absorption carbon dioxide using water. Governing equations were solved by finite element method. The impact of temperature and velocity of liquid phase and velocity of gas phase on CO₂ absorption flux has been investigated. Results showed that by increasing liquid phase velocity, CO₂ absorption flux increases remarkably. Also, CO₂ absorption flux increases only 6 % by increasing gas phase velocity from 0.02 to 0.06. Thus, liquid phase is the controller of mass transfer in gas absorption process. The results also showed that CO₂ absorption flux decreases by increasing liquid phase temperature, due to the reduction of gas solubility in liquid phase, and outlet CO₂ concentration of liquid phase decreases too. To validate of model’s results, the data of two experimental works have been used.