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perhaps it is an aluminium-gallium alloy you are thinking of.
whatever metal you use it would be more efficient to make the hydrogen directly than to produce the metal and make hydrogen from it.
You could run a steam engine from the exhaust and run a generator from that to produce H2 electrolytically.
You can skip the hydrogen production and go straight to electricity.
Quote from: Geezer on 16/11/2009 19:35:49You can skip the hydrogen production and go straight to electricity.Cheers Geez!Can't use me waste heat though...I'm convinced it'll work - the ol' metal & water & heat thang!
OK - see your point! I suppose some of the heat could be used to speed up the reaction of the AlAir battery, but it might not help much. I'm no chemist!
Are you totally dedicated to using a metal?Carbon reacts with hot steam to produce H2 and CO both of which can be used as fuels.Of course, this does use up carbon, but then so does that scheme for "recyling" zinc.
Using the hot exhaust to provide power via a turbine would be a better use, and use the leftover power to provide steam to add to the inlet. Google steam cycle for more info, although the steam has a bad tendency to cause cylinder bore wear.