A type of process

which absorbs carbon dioxide (CO2) from flue gas in hollow fiber membrane contactor

has been considered as one of clean

high efficient and the most promising decarburization technologies. A two-dimensional mathematical model was developed for absorption of CO2 from parallel countercurrent mixed gas by hollow fiber membrane contactor. By using finite element method

CO2 removal(decarburization) and mass transfer performance of three absorbents EEA(ethyl-ethanolamine)

EDA(ethylenediamine) and PZ(piperazine) were simulated at various operation conditions in which axial and radial diffusion in membrane contactor as well as diffusion in fiber and membrane pores and non-wetting condition were considered. The simulation results show that the order of decarburization performance is PZ > EDA > EEA. The influence of the gas phase parameters on CO2 removal and mass transfer is more significant than that of liquid phase parameters. With increase of gas flow rate

CO2 concentration

and gas temperature

the decarburization efficiency decreases. While the CO2 removal efficiency goes up when liquid flow rate

solvent concentration

and liquid temperature increase. However

the CO2 mass transfer rate speeds up with increase of all parameters except gas temperature. So

the suitable control of liquid parameters is required

which are not over high to prevent adverse effects on CO2 absorption.