Thermo-osmosis of mixtures of water and methanol through a Nafion membrane



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García Villaluenga, Juan Pedro and Seoane Rodríguez, Benjamín and Barragán García, Vicenta María and Ruiz Bauzá, Carlos (2006) Thermo-osmosis of mixtures of water and methanol through a Nafion membrane. Journal of Membrane Science, 274 (01-Feb). pp. 116-122. ISSN 0376-7388

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Mass transport of mixtures of water and methanol through a Nation membrane as a function of the temperature difference between the two sides of the membrane was measured under different experimental conditions. The results show that the composition of the solutions, the temperature difference across the membrane, and the mean temperature in the membrane cell are governing factors in the thermo-osmotic transport process. In all cases studied, the thermo-osmotic flux through the membrane goes from the low temperature side to the high temperature side, and it increases linearly with the temperature difference. Moreover, the flux also increases with the mean temperature in the membrane cell. The thermo-osmotic coefficient of methanol in the membrane is higher than that of water. For water/methanol mixtures, the total flux through Nation membrane can be larger than the fluxes of pure solvents, and it increases with the methanol content for water/methanol mixtures.

Item Type:Article
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© 2005 Elsevier B.V. l support from Ministerio de Ciencia y Tecnología
of Spain under Project BFM2000-0625 is gratefully acknowledged.

Uncontrolled Keywords:Cellulose-Acetate Membranes, Anion-Exchange Membranes, Cross-Phenomenological Coefficients, Osmotic-Pressure Difference, Fuel-Cells, Temperature Difference, Solvent Transport, Charged Membranes, Pem Fuel, Thermoosmosis.
Subjects:Sciences > Physics > Thermodynamics
ID Code:20677
Deposited On:08 Apr 2013 10:26
Last Modified:11 Mar 2016 17:00

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