Vm. Barragan et C. Ruizbauza, EFFECT OF UNSTIRRED SOLUTION LAYERS ON THE THERMAL MEMBRANE-POTENTIALTHROUGH CATION-EXCHANGE MEMBRANES, Journal of membrane science, 125(2), 1997, pp. 219-229
The thermal membrane potential through a cation-exchange membrane has
been determined under different experimental situations. In all cases,
a good linear dependence between the thermal membrane potential, Delt
a psi, and the temperature difference, Delta T, established between bo
th external electrolyte solutions has been observed. The value of Delt
a psi decreases notably when the concentration of the electrolyte solu
tion used is increased and it also depends on the type of the cation i
nvolved, so that Delta psi decreases when the corresponding atomic num
ber increases. The value of the temperature coefficient, Delta psi/Del
ta T, is notably affected by the unstirred solution layers adjoining t
he membrane surfaces. A theoretical model is presented to determine th
e influence of the temperature polarization effect on the thermal memb
rane potential value.