The person mentioned as far as water vapor designed a modified SmackBooster and found that the gas produced would not burn...my guess being that it was running too hot due to his attempts a making a sealed series plate design out of it. His cell temps were in the 158F range...at least outside the cell...temp around the plates was likely higher.
A lot of gas that is mostly water vapor is not good. Can't push these cells.
My 3 plate cell tested at .07 L / min running at 12V....6 amps and 113F. Impressive eh? My guess is around .25 L / min with 2....3 plate cells in series running at 6V.
You can find 91% isopropyl which might work. 70% also. Isopropyl has been used as a gas additive.
http://en.wikipedia.org/wiki/Isopropyl
isopropyl is a substituent form of propane, the three-carbon alkyl functional group. As an isomer of propyl, bonding to an R group occurs at the secondary (2?) carbon.
__________________
Leading the perpetually ignorant and uninformed into the light of scientific knowledge. Did I really say that?
a new policy....I intend to ignore the nescient...a waste of time and energy.