Study of the activation energy for transport of water and methanol through a Nafion membrane



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Godino Gómez, María Paz and Barragán García, Vicenta María and García Villaluenga, Juan Pedro and Izquierdo Gil, María Amparo and Seoane Rodríguez, Benjamín and Ruiz Bauzá, Carlos (2009) Study of the activation energy for transport of water and methanol through a Nafion membrane. Chemical Engineering Journal, 152 (1). pp. 20-25. ISSN 1385-8947

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This study investigates the influence of different operating parameters in the transport of water and methanol through a Nafion membrane when it is used to separatewater fromamethanol–water solution. For this purpose, measurements of mass flux and concentration change have been performed at different values of circulation velocity, concentration of themethanol–water solutions and temperature conditions. From the experimental data, thewater and methanol partial fluxes have been estimated, and itwas found that the water flux is always lower than the methanol flux, but it cannot be neglected. Whereas total and methanol fluxes seem to have predictable and similar behaviors, the water flux seems to be less predictable and it exhibits a very distinct behavior.
Methanol and water permeabilities have been calculated, and from these values the activation energy of methanol and water fluxes in the membrane has been estimated. The results have been discussed in terms of the methanol and water solubilities in the membrane.

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© 2009 Elsevier B.V. The authors of this study gratefully acknowledge financial support from Comunidad de Madrid and Universidad Complutense de
Madrid under Project CCG06-UCM/MAT-1037.

Uncontrolled Keywords:Fuel-Cell Performance, Polymer Electrolyte, Composite Membranes, Diffusion, Crossover, Mixtures, Alcohol
Subjects:Sciences > Physics > Thermodynamics
ID Code:20495
Deposited On:05 Apr 2013 12:04
Last Modified:11 Mar 2016 14:25

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