RT Journal Article
T1 Transport of methanol and water through Nafion membranes
A1 Barragán García, Vicenta María
A1 Ruiz Bauzá, Carlos
A1 García Villaluenga, Juan Pedro
A1 Seoane Rodríguez, Benjamín
AB The mass flow originated when two methanol–water solutions of different methanol concentrations are separated by a membrane has been studied for two Nafion membranes. From the experimental results, the methanol and water permeabilities have been estimated. The experiments were carried out in absence and in presence of an electrolyte in the solutions. The obtained results show that, in the absence of the electrolyte, the methanol diffusion flow is higher than the osmotic water flow at all the methanol concentration gradient established, observing that the total mass flow takes place always from the concentrated toward the dilute solution. In contrast, in the presence of the electrolyte, an inversion of the total mass flow is observed at percentages of methanol higher than 40 wt.%. These experimental results could be important in relation to the problem of the methanol crossover in direct methanol fuel cells.
PB Elsevier Science BV
SN 0378-7753
YR 2004
FD 2004-05
LK https://hdl.handle.net/20.500.14352/50583
UL https://hdl.handle.net/20.500.14352/50583
LA eng
NO © 2003 Elsevier B.V. Financial support from Ministerio de Ciencia y Tecnología of Spain under Project BFM2000-0625 is gratefully acknowledged.
NO Ministerio de Ciencia y Tecnología of Spain
DS Docta Complutense
RD 6 abr 2025