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  Hydrogen diffusivity and electrolyte permeability of the Zirfon PERL separator for alkaline water electrolysis

Schalenbach, M., Lüke, W., & Stolten, D. (2016). Hydrogen diffusivity and electrolyte permeability of the Zirfon PERL separator for alkaline water electrolysis. Journal of the Electrochemical Society, 163(14), F1480-F1488. doi:10.1149/2.1251613jes.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0002-19CA-F Version Permalink: http://hdl.handle.net/21.11116/0000-0002-19CB-E
Genre: Journal Article

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 Creators:
Schalenbach, Maximilian1, 2, Author              
Lüke, Wiebke1, Author              
Stolten, Detlef1, 3, Author              
Affiliations:
1Forschungszentrum Jülich GmbH, Institute of Energy and Climate Research, IEK-3: Electrochemical Process Engineering, Jülich, Germany, persistent22              
2Electrocatalysis, Interface Chemistry and Surface Engineering, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_1863354              
3Department of Fuel Cells, RWTH Aachen University, Aachen, Germany, persistent22              

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Free keywords: Diffusion; Electrolysis; Hydrogen; Permeation; Potassium hydroxide; Separators; Zirconium compounds, Alkaline water electrolysis; Differential pressures; Hydrogen diffusivity; Molarity; Water electrolysis, Electrolytes
 Abstract: The hydrogen and oxygen evolved during alkaline water electrolysis with liquid KOH electrolytes are typically separated using porous separators such as Zirfon PERL (Agfa), a commercially available composite of zirconium oxide and polysulfone. In this study, the hydrogen diffusivity (driven by concentration differences) and electrolyte permeability (driven by differential pressures) of the Zirfon PERL separator were characterized as a function of the temperature and molarity of the KOH filling. The diffusivity of hydrogen in the separator was found to be approximately 16 of that of the electrolyte filling inside its pores. With respect to water electrolysis conditions, the extent of hydrogen cross-permeation caused by the convection of the cross-permeating electrolyte was estimated and compared to that caused by diffusion. On the basis of the physically characterized mechanisms, smaller pores were predicted to reduce the differential pressure driven gas cross-permeation. © The Author(s) 2016. Published by ECS. All rights reserved.

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Language(s): eng - English
 Dates: 2016
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1149/2.1251613jes
BibTex Citekey: Schalenbach2016F1480
 Degree: -

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Title: Journal of the Electrochemical Society
  Abbreviation : J. Electrochem. Soc.
Source Genre: Journal
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Publ. Info: New York, NY, USA : Electrochemical Society
Pages: - Volume / Issue: 163 (14) Sequence Number: - Start / End Page: F1480 - F1488 Identifier: ISSN: 0013-4651
CoNE: /journals/resource/991042748197686