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Wind becomes hydrogen

Power-to-Gas (PtG)

Electrolysis

Alkaline water electrolysers have an efficiency of around 65%. Prototypical plants achieve more than 80%. With membrane electrolysis, the process engineering outlay is lower because a solid electrolyte is used. However, expensive precious metal catalysts are required for the electrodes. With high-temperature steam electrolysis, water vapour is split. A portion of the required energy is thermally fed. This reduces the need for electric energy.

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Elektrolyse-Teststand: im DLR entwickelte Elektroden für die alkalische Wasserelektrolyse.

© DLR

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Supported by: The Federal Government on the basis of a decision by the German Bundestag

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