Salt diffusion through cation-exchange membranes in alcohol-water solutions



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Izquierdo Gil, María Amparo and Barragán García, Vicenta María and Godino Gómez, María Paz and García Villaluenga, Juan Pedro and Ruiz Bauzá, Carlos and Seoane Rodríguez, Benjamín (2009) Salt diffusion through cation-exchange membranes in alcohol-water solutions. Separation and Purification Technology, 64 (3). pp. 321-325. ISSN 1383-5866

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The salt flow through several commercial cation-exchange membranes separating two NaCl alcohol-water solutions with the same alcohol concentration, but different NaCl concentration was investigated. Homogeneous (Nafion-115) and heterogeneous (MK-40 and CR65-AZL-412) membranes were used in this work. The integral permeability coefficient was determined from the temporal evolution of the concentration in the dilute solution. The results showed that the integral permeability coefficient depends on both the solution alcohol concentration and the type of alcohol. It is observed that this dependence is function of the membrane structure. In general, for the heterogeneous membranes, the integral permeability coefficient is less sensible to alcohol concentration than for the homogeneous membrane at low and intermediate values of the alcohol percentage in the solutions.

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© 2008 Elsevier B.V. The authors of this study gratefully acknowledge Prof. C. Larchet and Prof. V. Nikonenko for donating MK40 membrane samples. Financial support from Comunidad de Madrid and Universidad
Complutense de Madrid under Project CCG06-UCM/MAT-1037 is
also gratefully acknowledged.

Uncontrolled Keywords:Methanol Fuel-Cells, Nonstationary Diffusion, Transport-Properties, Nafion Membranes, Electrolyte, Coefficients, Potentials, Behavior, Volumes, Nacl.
Subjects:Sciences > Physics > Thermodynamics
ID Code:20614
Deposited On:05 Apr 2013 11:31
Last Modified:11 Mar 2016 14:29

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