TY - JOUR
T1 - Modeling Donnan Dialysis Separation for Carboxylic Anion Recovery
AU - Prado Rubio, Oscar Andres
AU - Møllerhøj, Martin
AU - Jørgensen, Sten Bay
AU - Jonsson, Gunnar Eigil
PY - 2010
Y1 - 2010
N2 - dynamic model for transport of multiple ions through an anion exchange membrane is derived based on an irreversible thermodynamics approach. This model accounts for the convective transport of the dissociated and undissociated species in the channels with diffusion and migration across the boundary layers and membranes. Donnan equilibrium, flux continuity of the transported ions, the electroneutrality condition and Faraday's law are employed to describe the electrical potential and concentration discontinuities at the interfaces. The Nernst-Planck equation is used to model the ion transport though boundary layers and membranes. The model consists of a system of partial differential equations that are solved numerically. The aim of this paper is to corroborate this general model for several monoprotic carboxylic acids reported in the literature. The model reproduces satisfactorily experimental fluxes for monoprotic ions. Additionally, previously qualitatively estimated concentration profiles within the boundary layers and membranes are predicted.
AB - dynamic model for transport of multiple ions through an anion exchange membrane is derived based on an irreversible thermodynamics approach. This model accounts for the convective transport of the dissociated and undissociated species in the channels with diffusion and migration across the boundary layers and membranes. Donnan equilibrium, flux continuity of the transported ions, the electroneutrality condition and Faraday's law are employed to describe the electrical potential and concentration discontinuities at the interfaces. The Nernst-Planck equation is used to model the ion transport though boundary layers and membranes. The model consists of a system of partial differential equations that are solved numerically. The aim of this paper is to corroborate this general model for several monoprotic carboxylic acids reported in the literature. The model reproduces satisfactorily experimental fluxes for monoprotic ions. Additionally, previously qualitatively estimated concentration profiles within the boundary layers and membranes are predicted.
U2 - 10.1016/j.compchemeng.2010.03.003
DO - 10.1016/j.compchemeng.2010.03.003
M3 - Journal article
SN - 0098-1354
VL - 34
SP - 1567
EP - 1579
JO - Computers & Chemical Engineering
JF - Computers & Chemical Engineering
IS - 10
ER -