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Woven Stainless-Steel Mesh as a Gas Separation Membrane for Alkaline Water-Splitting Electrolysis
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Charlie Dunnill
Membranes, Volume: 10, Issue: 5, Start page: 109
Swansea University Authors:
Michael Warwick , Charlie Dunnill
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DOI (Published version): 10.3390/membranes10050109
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...
| Published in: | Membranes |
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| ISSN: | 2077-0375 |
| Published: |
MDPI AG
2020
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| Online Access: |
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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. |
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| Keywords: |
membrane; water-splitting; electrolysis; alkaline; gas-separation; hydrogen production |
| College: |
Faculty of Science and Engineering |
| Issue: |
5 |
| Start Page: |
109 |