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Originally Posted by lezinterracial
It seems that hydrogen gas is made by electrolysis of water. Separation of H2 and O.
I wonder if this would be bad. Using water for fuel, where water could be wasted?
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Yeah, but when you burn Hydrogen in an Oxygen atmosphere you get water, the binding of the H2 and the O.
So, theoretically, you could recapture some of the water coming out from the exhaust and recycle it into another electrolysis reaction. Unfortunately, running an electrolysis reaction in the automobile itself is not very efficient.
As of 2017, for large scale hydrogen extraction:
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Very roughly, a new electrolysis plant today delivers energy efficiency of around 80%. That is, the energy value of the hydrogen produced is about 80% of the electricity used to split the water molecule. Steam reforming is around 65% efficient.
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https://www.carboncommentary.com/blo...carbon-economy