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Author Topic: Current in electrolysis of water  (Read 727 times)

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Fav123

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Current in electrolysis of water
« on: November 14, 2018, 05:07:06 AM »

Hello,

I need to determine the current required to produce dihydrogen in electrolysis of water. The production of hydrogen must be of 100t a day (1157.41 g/s). The potential difference in the electrodes is 2V. I need to find the current required for such a production, but when I do the maths, I find a very high current intensity. Can someone help me ?
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Borek

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Re: Current in electrolysis of water
« Reply #1 on: November 14, 2018, 06:36:31 AM »

Faraday's laws of electrolysis are all you need.

High currents are nothing surprising in this context.
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chenbeier

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Re: Current in electrolysis of water
« Reply #2 on: November 14, 2018, 07:56:38 AM »

Hello,

I need to determine the current required to produce dihydrogen in electrolysis of water. The production of hydrogen must be of 100t a day (1157.41 g/s). The potential difference in the electrodes is 2V. I need to find the current required for such a production, but when I do the maths, I find a very high current intensity. Can someone help me ?

It will be 115000 kA. What means bz using 2 V = 230000 kW = 230 MW . You need a power plant for that.
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Fav123

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Re: Current in electrolysis of water
« Reply #3 on: November 14, 2018, 10:29:03 AM »

Thank you very much for your help.
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Enthalpy

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Re: Current in electrolysis of water
« Reply #4 on: November 15, 2018, 02:25:46 AM »

Electricity is an expensive form of energy, most often obtained from heat, and electrolysis wastes much of the electric power. If electrolysis consumes 230MW, one should consider other ways to produce the hydrogen. Several paths exist, approximately like reacting a metal with water and reducing the metal oxide with heat (I've forgotten the details and may be inaccurate here).
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