In this study, the absorption process of the aqueous DEEA solution for
CO2 capture in polytetrafluoroethylene hollow-fiber membrane contactor
was investigated by both experiment and simulation. Based on the finite
element analysis method, a two-dimensional steady-state mathematical
model was established using COMSOL Multiphysics simulation software to
calculate the CO2 mass transfer flux (JCO2) of DEEA in the hollow fiber
membrane contactor under non-wetting and partial wetting conditions and
the distribution of CO2 concentration under corresponding conditions.
The results show that the predicted JCO2 under 15% membrane wetting
conditions is in good agreement with the experimental value, and the
mass transfer performance is severely reduced under wetting conditions.
In addition, a dimensionless equation was developed to predict the
liquid phase, gas phase and membrane phase mass transfer coefficient and
JCO2. The calculated JCO2 values are in good agreement with the
experimental values with the average relative deviation (AARD) of 9.4%.