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<\/p>\nWhen making hydrogen in an electrolyser, at the same time also oxygen is produced. To avoid an explosive mixture, a sub-microporous separator is placed in between the electrodes. However, this separator leads to large energy losses and allows dissolved gas to pass (see also\u00a0https:\/\/jwhaverkort.weblog.tudelft.nl\/?p=140).<\/p>\n
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Electrolyte flow can be used to separate all hydrogen and oxygen and make for a membraneless electrolyser.<\/p><\/blockquote>\n
The question is whether flow can ensure separation more energy-efficiently than a physical separator. Using a combination of modelling and experiments we found the answer to be: yes!<\/p>\n
Placing the electrodes approximately half a millimetre apart the ohmic losses can be made much smaller than with a separator, while the pumping power adds only a small additional loss.<\/p>\n
Rajaei, H., Rajora, A., & Haverkort, J. W. (2021). Design of membraneless gas-evolving flow-through porous electrodes.\u00a0Journal of Power Sources<\/i>,\u00a0491<\/i>, 229364.<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"
When making hydrogen in an electrolyser, at the same time also oxygen is produced. To avoid an explosive mixture, a sub-microporous separator is placed in between the electrodes. However, this separator leads to large energy losses and allows dissolved gas … Continue reading