RT Journal Article
T1 The Correlation between the Water Content and Electrolyte Permeability of Cation-Exchange Membranes
A1 Izquierdo Gil, María Amparo
A1 García Villaluenga, Juan Pedro
A1 Muñoz San Martín, Sagrario
A1 Barragán García, Vicenta María
AB The salt permeability through three commercial cation-exchange membranes with different morphologies is investigated in aqueous NaCl solutions. Ion-exchange membranes (IEMs) find application in different processes such as electrodialysis, reverse osmosis, diffusion dialysis, membrane electrolysis, membrane fuel cells and ion exchange bioreactors. The aim of this paper is the experimental determination of the electrolyte permeability in the following membranes: MK-40 membrane, Nafion N324 membrane and Nafion 117 membrane. The latter is selected as being a reference membrane. The effect of an increase in the NaCl concentration in the solutions on membranes transport properties is analyzed. With regard to membranes sorption, a decrease in the water content was observed when the external electrolyte concentration is increased. Concerning permeation through the membranes, the salt permeability increased with concentration for the Nafion 117 membrane and remained nearly constant for the other two membranes. A close relation between the degree of liquid sorption by the membranes and the electrolyte permeability was observed.
PB MDPI
SN 1422-0067
YR 2020
FD 2020-08-17
LK https://hdl.handle.net/20.500.14352/6669
UL https://hdl.handle.net/20.500.14352/6669
LA eng
NO The authors of this study gratefully acknowledge financial support from Banco de Santander and Universidad Complutense de Madrid under Projects PR26-16-20296 and PR75/18-21589.
NO Universidad Complutense de Madrid/Banco de Santander
DS Docta Complutense
RD 2 may 2024