A Vaporization-Exchange Model for Water Sorption and Flux in Nafion

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DOIResolve DOI: http://doi.org/10.1016/j.memsci.2008.05.080
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TypeArticle
Journal titleJournal of Membrane Science
Volume324
Issue1-2
Pages16; # of pages: 6
SubjectNafion; Water sorption or desorption; Hydraulic permeation or bulk diffusion; Interfacial vaporization/condensation kinetics
Abstractmodel is developed to describe sorption or desorption of water from planar Nafion membranes with one face contacting stagnant water or saturated water vapor and the opposite face exposed to flowing gas. Interfacial evaporation/condensation kinetics is considered along with bulk water transport. Simplifying assumptions yield analytical formulas that relate the steady-state or transient system response to the gas flow rate. The approximate predictions correlate well with experimental data gathered under various conditions. Water transport rates are found to be limited by interfacial vaporization-exchange kinetics, rather than bulk percolation or diffusion, when membrane slabs are thinner than approximately 300 μm.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada; NRC Institute for Fuel Cell Innovation
Peer reviewedNo
NPARC number8901037
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Record identifierc5bcd48f-49ec-4990-9dcb-6dbcc1a36805
Record created2009-04-22
Record modified2016-05-09
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