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Barragán García, Vicenta María ; García Villaluenga, Juan Pedro ; Izquierdo Gil, María Amparo ; Godino Gómez, María Paz ; Seoane Rodríguez, Benjamín ; Ruiz Bauzá, Carlos | Elsevier Science BV | 2008-10-15Liquid permeation and uptake measurements of pure water and methanol were carried out using three commercial cation-exchange membranes: Nafion-117 (perfluorinated polyethylene with pendant ether-linked side chains terminated with sulfonated grou[...]texto impreso
Barragán García, Vicenta María ; Ruiz Bauzá, Carlos | Academic Press Inc Elsevier Science | 2002-03-01The current-voltage curves for a cation-exchange membrane separating two equal methanol-water electrolyte solutions were determined under different experimental conditions. From these curves, the values of the limiting current density, I-L, were[...]texto impreso
Barragán García, Vicenta María ; Ruiz Bauzá, Carlos | Academic Press Inc Elsevier Science | 1998-09-15The curves (V, I) of different ion-exchange membranes have been determined under different experimental conditions. Taking into account the classical theory of concentration polarization, a method has been developed to adjust the (V, I) data, up[...]texto impreso
The salt flow through passive membranes, separating two solutions of the same electrolyte but of different concentrations, has been obtained from a method based on the determination of the electric resistance between two fixed points in the more[...]texto impreso
Barragán García, Vicenta María ; Ruiz Bauzá, Carlos ; Imaña Pascual, José Luis | Elsevier Science BV | 2002-03-01The influence of an alternating (AC) sinusoidal perturbation, of known frequency and small amplitude, superimposed to the usual applied continuous (DC) signal in a desalination electrodialysis process has been studied. The experiments were carri[...]texto impreso
Barragán García, Vicenta María ; Ruiz Bauzá, Carlos | Academic Press Inc Elsevier Science | 2001-08-01The effect of an ac sinusoidal perturbation of known amplitude and frequency superimposed on the usual dc applied electric voltage difference on the electroosmotic flow through a typical cation-exchange membrane has been studied using different [...]texto impreso
Barragán García, Vicenta María ; Ruiz Bauzá, Carlos | Academic Press Inc Elsevier Science | 1997-11-01The water electroosmotic flux, J(v), through a cation exchange membrane has been measured as a function of the temperature, T, with various values of the electrolyte concentration and for different current densities. From these measurements the [...]texto impreso
Barragán García, Vicenta María ; Ruiz Bauzá, Carlos ; Mengual Cabezón, Juan Ignacio | Academic Press Inc Elsevier Science | 1994-12Electro-osmotic fluxes of water through two cation-exchange membranes have been measured under different experimental conditions. The influence of unstirred solution layers adjoining the membrane surfaces on the obtained values has been studied [...]texto impreso
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, Delta psi, and the temperature differen[...]texto impreso
Barragán García, Vicenta María ; Ruiz Bauzá, Carlos | Academic Press Inc Elsevier Science | 2000-10-15Electroosmosis experiments through a cation-exchange membrane have been performed using NaCl solutions in different experimental situations. The influence of an alternating (ac) sinusoidal perturbation, of known angular frequency and small ampli[...]texto impreso
Barragán García, Vicenta María ; Ruiz Bauzá, Carlos | Academic Press Inc Elsevier Science | 1999-04-01The electroosmotic flux through a cation-exchange membrane has been obtained in different situations. From these measurements, the apparent electroosmotic permeability, W, of a cation-exchange membrane has been determined as a function of the te[...]texto impreso
Barragán García, Vicenta María ; García Villaluenga, Juan Pedro ; Godino Gómez, María Paz ; Izquierdo Gil, María Amparo ; Ruiz Bauzá, Carlos ; Seoane Rodríguez, Benjamín | Academic Press Inc Elsevier Science | 2009-05-15Solvent uptake, hydraulic and electroosmotic permeabilities, true cation transport number, effective fixed charge concentration, and limiting current values have been determined in aqueous LiCl solutions for three commercial cation-exchange memb[...]texto impreso
García Villaluenga, Juan Pedro ; Barragán García, Vicenta María ; Izquierdo Gil, María Amparo ; Godino Gómez, María Paz ; Seoane Rodríguez, Benjamín ; Ruiz Bauzá, Carlos | John Wiley & SONS INC | 2009-11-05Liquid permeation measurements of water, methanol, and 2-propanol were carried out using a commercial cation-exchange membrane Nafion-117 (perfluorinated polyethylene with pendant ether-linked side chains terminated with sulfonated groups). The [...]texto impreso
Godino Gómez, María Paz ; Barragán García, Vicenta María ; García Villaluenga, Juan Pedro ; Izquierdo Gil, María Amparo ; Ruiz Bauzá, Carlos ; Seoane Rodríguez, Benjamín | Elsevier Science, SA | 2010-08-15The aim of this work was to study the sorption and transport of different water–alcohol solutions (methanol, ethanol, 1-propanol and 2-propanol solutions) when a Nafion 117 membrane is separating them. It was observed that methanol permeability [...]
