Rigorous Modeling of Carbon Dioxide Absorption by Ionic Liquids Using Hollow fiber Membrane Contactors
Paper ID : 1165-MST2015-FULL
nahid taghipour *1, peyman keshavarz2, Shahab Ayatollahi3, sara masoumi4
1Department of Chemical Engineering, School of Chemical and Petroleum Engineering, Shiraz University, Shiraz 7134851154, Iran
2School of Chemical and Petroleum Eng., Shiraz University, Shiraz, Iran.
3School of Chemical and Petroleum Engineering, Sharif University of Technology, Tehran, Iran
4Department of Chemical Engineering, School of Chemical and Petroleum Engineering, Shiraz University, Shiraz, Iran
The desirable membrane properties especially hollow fiber membrane configurations, has attracted investigators' attention in the new separation technology field. In this work, a new model was presented for increasing CO2 capture from flue gases. A comprehensive mathematical model has been developed for absorption of carbon dioxide through hollow fiber membrane contactors (HFMCs). The new idea was using ionic liquids such as [Emim][NTf2], [Bmim][PF6] and [Bmim][BF4] in the fibers as liquid solvents. Moreover, the model was validated with the experimental data obtained for CO2 removal using pure water as the liquid solvent. The impact of some parameters such as inlet CO2 partial pressure in the gas mixture, gas and liquid flow rates and possible wetting of the membrane has been examined on the absorption recovery percent. Results show that among presented ionic liquids, [Emim][NTf2] solvent has the best revenue. Furthermore, increasing gas and liquid phase velocity as well as increasing of partial pressure of CO2 in N2/CO2 mixture of inlet gas leads to an increase in the absorption flux in all solvents. Finally, it was concluded that membrane wetting reduces the flux impressively for all solutions.
Hollow fiber membrane; Ionic Liquid; CO2 absorption; Membrane contactor; Gas absorption; Modeling
Status : Paper Accepted (Poster Presentation)