Canadian Journal of Chemical Engineering, Vol.86, No.6, 1039-1046, 2008
MATHEMATICAL MODELLING OF CO2 FACILITATED TRANSPORT THROUGH LIQUID MEMBRANES CONTAINING AMINES AS CARRIER
An approximate analytical solution for the facilitated transport of carbon dioxide across a liquid membrane containing aqueous primary and secondary amine solutions has been developed in which the reversible reaction A(Co-2) + 2B(amine) double left right arrow AB(carbamate) + BH(protonated amine) occurs inside the liquid membranes. The current approximate analytical solution predicts the facilitated factor of CO2 through the membrane and is based on the dimensionless, nonlinear diffusion-reaction transport problem. The approximate analytical solution predicts the facilitation factors for the range from the moderate reaction rate to the equilibrium chemical reaction regime, allowing unequal diffusivities of complexes and carrier and cases of zero and nonzero permeate side solute concentrations. In the present mathematical model, a constant free carrier concentration is assumed throughout the membrane phase. In comparison with the numerically calculated results, the results obtained were found to be in well agreement.
Keywords:facilitated transport membranes;amines;carbon dioxide;liquid membranes;modelling;gas separation