Details
| Original language | English |
|---|---|
| Pages (from-to) | F3164-F3170 |
| Journal | Journal of the Electrochemical Society |
| Volume | 163 |
| Issue number | 11 |
| Publication status | Published - 24 Aug 2016 |
Abstract
The present contribution investigates the hydrogen permeation through a fumea EF-40 catalyst coated membrane during PEM water electrolysis. The permeation is characterized at different temperatures and different pressure gradients across the membrane. The measured permeation fluxes show a quadratic dependence on the pressure difference. A permeation model combining a diffusive and convective transport can describe the experimental data quantitatively. The determined diffusive permeability coefficient KP,diffeff = 2.95 × 10-14 mol/(m s Pa)at 60 °C and its temperature dependence agrees very well with literature values. A convective permeability coefficient of the membrane is proposed for the description of the quadratic dependence. The obtained convective permeability coefficient KP,conveff = 9.02 × 10-21 mol/(m s Pa2)at 60 °C indicates a high hydraulic permeability in comparison with recently reported values. This high hydraulic permeability can be attributed especially to the low equivalent weight of the investigated membrane. Additionally, the operating conditions are suspected to support permeation.
ASJC Scopus subject areas
- Materials Science(all)
- Electronic, Optical and Magnetic Materials
- Energy(all)
- Renewable Energy, Sustainability and the Environment
- Materials Science(all)
- Surfaces, Coatings and Films
- Chemistry(all)
- Electrochemistry
- Materials Science(all)
- Materials Chemistry
Sustainable Development Goals
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In: Journal of the Electrochemical Society, Vol. 163, No. 11, 24.08.2016, p. F3164-F3170.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Hydrogen permeation in PEM electrolyzer cells operated at asymmetric pressure conditions
AU - Trinke, P.
AU - Bensmann, B.
AU - Reichstein, S.
AU - Hanke-Rauschenbach, R.
AU - Sundmacher, K.
N1 - Funding information: The authors gratefully acknowledge financial support from Deutsche Forschungsgemeinschaft, Grant nr. HA 6841/2-1 and SU 189/7-1.
PY - 2016/8/24
Y1 - 2016/8/24
N2 - The present contribution investigates the hydrogen permeation through a fumea EF-40 catalyst coated membrane during PEM water electrolysis. The permeation is characterized at different temperatures and different pressure gradients across the membrane. The measured permeation fluxes show a quadratic dependence on the pressure difference. A permeation model combining a diffusive and convective transport can describe the experimental data quantitatively. The determined diffusive permeability coefficient KP,diffeff = 2.95 × 10-14 mol/(m s Pa)at 60 °C and its temperature dependence agrees very well with literature values. A convective permeability coefficient of the membrane is proposed for the description of the quadratic dependence. The obtained convective permeability coefficient KP,conveff = 9.02 × 10-21 mol/(m s Pa2)at 60 °C indicates a high hydraulic permeability in comparison with recently reported values. This high hydraulic permeability can be attributed especially to the low equivalent weight of the investigated membrane. Additionally, the operating conditions are suspected to support permeation.
AB - The present contribution investigates the hydrogen permeation through a fumea EF-40 catalyst coated membrane during PEM water electrolysis. The permeation is characterized at different temperatures and different pressure gradients across the membrane. The measured permeation fluxes show a quadratic dependence on the pressure difference. A permeation model combining a diffusive and convective transport can describe the experimental data quantitatively. The determined diffusive permeability coefficient KP,diffeff = 2.95 × 10-14 mol/(m s Pa)at 60 °C and its temperature dependence agrees very well with literature values. A convective permeability coefficient of the membrane is proposed for the description of the quadratic dependence. The obtained convective permeability coefficient KP,conveff = 9.02 × 10-21 mol/(m s Pa2)at 60 °C indicates a high hydraulic permeability in comparison with recently reported values. This high hydraulic permeability can be attributed especially to the low equivalent weight of the investigated membrane. Additionally, the operating conditions are suspected to support permeation.
KW - hydrogen
KW - Proton exchange membrane fuel cells (PEMFC)
KW - Temperature distribution
KW - Permeation
KW - electrolysis
KW - coated membranes
KW - Regenerative Fuel Cells
KW - Alkaline Water
UR - http://www.scopus.com/inward/record.url?scp=85016007580&partnerID=8YFLogxK
U2 - 10.1149/2.0221611jes
DO - 10.1149/2.0221611jes
M3 - Article
AN - SCOPUS:85016007580
VL - 163
SP - F3164-F3170
JO - Journal of the Electrochemical Society
JF - Journal of the Electrochemical Society
SN - 0013-4651
IS - 11
ER -