Measuring electro-osmotic drag coefficients in PFSA membranes without any diffusion assumption

Measuring electro-osmotic drag coefficients in PFSA membranes without any diffusion assumption

An original set-up derived from the now standard hydrogen pump set-up is presented. The system enables isolation of the electro-osmosis as the lone macroscopic mass transport phenomenon, by minimizing or suppressing other external gradients, keeping the total pressure as the unique adjustment macros...

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Bibliographic Details
Published in:International journal of hydrogen energy Vol. 44; no. 45; pp. 24905 - 24912
Main Authors: Sellin, R.C., Mozet, K., Ménage, A., Dillet, J., Didierjean, S., Maranzana, G.
Format: Journal Article
Language:English
Published: Elsevier Ltd 20-09-2019
Elsevier
Subjects:
Electro-osmotic drag
Engineering Sciences
Hydrogen pump
PFSA membrane
PFSA membrane
Electro-osmotic drag
Hydrogen pump
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Summary:An original set-up derived from the now standard hydrogen pump set-up is presented. The system enables isolation of the electro-osmosis as the lone macroscopic mass transport phenomenon, by minimizing or suppressing other external gradients, keeping the total pressure as the unique adjustment macroscopic parameter. The Electro-Osmotic Drag (EOD) coefficient was determined using 4 Nafion™ MEA (XL, 115, 117, 1110) as material, for temperature values in the 50–80 °C range, relative humidity (RH) values in the 30–90% range and current densities ranging from 1.2 up to 1000 mA cm−2. Pure Nafion™membranes exhibit the same behaviours with EOD coefficients between 0.8 and 1 and which do not depend on the current density or RH. Nafion™ XL based MEA show a singular behaviour with an EOD coefficient sometime as low as 0.4 and which depends on the RH. •The electro-osmotic drag coefficient in PFSA membranes is measured without any diffusion assumptions.•The Electro-Osmotic Drag coefficient was determined using 4 Nafion™ MEA (XL, 115, 117, 1110).•Pure Nafion™ membranes exhibit the same behaviours with EOD coefficients between 0.8 and 1.•Nafion™ XL based MEA show a singular behaviour with an EOD coefficient sometime as low as 0.4 and which depends on the RH.
ISSN:0360-3199
1879-3487
DOI:10.1016/j.ijhydene.2019.07.076