Hydrogen Power: Separating Gas from Salt Water for Energy

[WCOLtd]

How much hydrogen gas can be separated from salt water for every kilowatt/hr of energy? Rough approximations are fine.

 

[anarchospider]

And how to collect the hydrogen?

 

[russ_watters]

Well, the bond energy of water is 918 kJ/mol or 51 kJ/g. If electrolysis is typically 75% efficient, you'd need 68 kJ/g. A kWh is 3.6MJ, so that's 529 g/hr.