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Mathematical modelling of CO 2 facilitated transport through liquid membranes containing amines as carrier
Author(s) -
Gorji Aliakbar Heydari,
Kaghazchi Tahereh
Publication year - 2008
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.20107
Subject(s) - dimensionless quantity , membrane , facilitated diffusion , amine gas treating , chemistry , diffusion , aqueous solution , permeation , thermodynamics , chemical reaction , organic chemistry , physics , biochemistry
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) $\Leftrightarrow$ AB(carbamate) + BH(protonated amine) occurs inside the liquid membranes. The current approximate analytical solution predicts the facilitated factor of CO 2 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.