Collect. Czech. Chem. Commun. 1987, 52, 1692-1700

Modelling of mass transport and chemical reaction in a diaphragm

Martin Schleiffa, Günther Lefelda, Hermann Matschinera and Otomar Špalekb

a Martin Luther Universität, 4020 Halle/S., G.D.R.
b Institute of Inorganic Chemistry, Czechoslovak Academy of Sciences, 160 00 Prague 6, Czechoslovakia


A mathematical model was proposed for the transport of ions in a diaphragm separating an acidic and an alkaline electrolyte. Besides an approximate analytical solution, a more exact numerical one was presented. The model permits the calculation of the position of the neutralization zone in the diaphragm, rates of transport of ions, and potential in the diaphragm. The dependence of the position of the neutralization zone on the composition of both electrolytes and on the current density was calculated for two technically important cases.