Mass transfer performance and correlation for CO2 absorption into aqueous 3-diethylaminopropylamine solution in a hollow fiber membrane contactor

3-Diethylaminopropylamine (DEAPA), a diamine with high reaction rate and large absorption capacity, was investigated in this work to evaluate its CO 2 absorption mass transfer performance in a hollow fiber membrane contactor in terms of the CO 2 absorption flux (J CO2 ). A series of experiments were conducted at various operation conditions and the effects of several influential parameters on J CO2 were examined and discussed in detail, including the liquid flow rate, the inlet gas flow rate, amine concentration, feed liquid temperature, CO 2 partial pressure, lean CO 2 loading, and membrane contactor height. Experimental results indicated that lean CO 2 loading and membrane contactor height have negative effect on the total mass transfer performance since the value of J CO2 decreases with the increase of these two factors, while the other five parameters exhibit positive effect and their increase lead to the increase of J CO2 values. In addition, a numerical correlation was established to predict the overall gas phase mass transfer coefficient and the CO 2 absorption flux, and the average absolute deviation (AAD) is 6.84%.