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Woven Stainless-Steel Mesh as a Gas Separation Membrane for Alkaline Water-Splitting Electrolysis / Michael, Warwick; Charlie, Dunnill

Membranes, Volume: 10, Issue: 5, Start page: 109

Swansea University Authors: Michael, Warwick, Charlie, Dunnill

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Abstract

A 316-grade woven stainless-steel mesh membrane was investigated as a gas-separation membrane for alkaline water-splitting electrolysis. Its resistance was measured using electrochemical impedance spectroscopy (EIS) and linear sweep voltammetry (LSV), with the conclusion that it presented approximat...

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Published in: Membranes
ISSN: 2077-0375
Published: MDPI AG 2020
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URI: https://cronfa.swan.ac.uk/Record/cronfa54309
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Abstract: A 316-grade woven stainless-steel mesh membrane was investigated as a gas-separation membrane for alkaline water-splitting electrolysis. Its resistance was measured using electrochemical impedance spectroscopy (EIS) and linear sweep voltammetry (LSV), with the conclusion that it presented approximately half the resistance of a comparable commercial alternative (ZirfonTM). Its gas-separation performance was analysed using gas chromatography (GC) at 140 mA cm−2, where it achieved 99.25% purity at the hydrogen outlet of the electrolyser. This fell to 97.5% under pumped circulation, which highlights that it is sensitive to pressure differentials. Nevertheless, this mixture is still more than a factor two inside the upper flammability limit of hydrogen in oxygen. It is hoped that such a low-cost material may bring entry-level electrolysis to many hitherto discounted applications.
Keywords: membrane; water-splitting; electrolysis; alkaline; gas-separation; hydrogen production
Issue: 5
Start Page: 109