Impact of Pressure and Temperature on Hydrogen Permeation in PEM Water Electrolyzers Operated at Asymmetric Pressure Conditions

Impact of Pressure and Temperature on Hydrogen Permeation in PEM Water Electrolyzers Operated at Asymmetric Pressure Conditions

The present work investigates the hydrogen permeation through a polymer electrolyte membrane (PEM) of a fumea EF-40 catalyst coated membrane (CCM) during water electrolysis. The permeation rate is measured at different cell temperatures and different pressure gradients across the membrane. The deter...

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Veröffentlicht in:ECS transactions 2016-01, Vol.75 (14), p.1081-1094
Hauptverfasser: Trinke, Patrick, Bensmann, Boris, Reichstein, Sven, Hanke-Rauschenbach, Richard, Sundmacher, Kai
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container_issue 14
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creator Trinke, Patrick
Bensmann, Boris
Reichstein, Sven
Hanke-Rauschenbach, Richard
Sundmacher, Kai
description The present work investigates the hydrogen permeation through a polymer electrolyte membrane (PEM) of a fumea EF-40 catalyst coated membrane (CCM) during water electrolysis. The permeation rate is measured at different cell temperatures and different pressure gradients across the membrane. The determined permeation fluxes show a quadratic dependence on pressure difference. This can be described qualitatively very well with a permeation model that considers a diffusive and convective hydrogen transport through the membrane. The determined diffusive permeability coefficient KeffP,diff = 2.95E-14 mol/(m s Pa) at 60 °C and its temperature dependence agrees very well with comparable literature values. The proposed convective permeability coefficient KeffP,conv = 9.02E-21 mol/(m s Pa²) at 60 °C indicates a high hydraulic permeability for the investigated EF-40 in comparison with recently reported values for Nafion membranes.
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title Impact of Pressure and Temperature on Hydrogen Permeation in PEM Water Electrolyzers Operated at Asymmetric Pressure Conditions
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