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Woven Stainless-Steel Mesh as a Gas Separation Membrane for Alkaline Water-Splitting Electrolysis

Energy Safety Research Institute, Swansea University Bay Campus, Fabian Way, Swansea SA1 8EN, UK
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Membranes 2020, 10(5), 109; https://doi.org/10.3390/membranes10050109
Received: 24 April 2020 / Revised: 15 May 2020 / Accepted: 20 May 2020 / Published: 23 May 2020
(This article belongs to the Section Membrane Engineering and Applications)
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. View Full-Text
Keywords: membrane; water-splitting; electrolysis; alkaline; gas-separation; hydrogen production membrane; water-splitting; electrolysis; alkaline; gas-separation; hydrogen production
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MDPI and ACS Style

Gannon, W.J.F.; Warwick, M.E.A.; Dunnill, C.W. Woven Stainless-Steel Mesh as a Gas Separation Membrane for Alkaline Water-Splitting Electrolysis. Membranes 2020, 10, 109.

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