Hello, just thought id throw this one into the works: Pyrolyze electrolytic caps expose all that stored energy without Al oxidation. The pic shows the sort of setup ive used, before it broke, decelleration syndrom, i dropped it. With the valve closed NaOh is introduced through the header assebly, this will cause an increase of preasure inside the vessel preventing the NaOH from going through the mest and into the Al foil. Once the valve is opened the gas will expell out through the H2O scrubber, effectively removing water. If you close the valve the preasure will push the NaOH up the header pipe away from the exposed Al foil. You can adjust the preasue by adjustion your header hight. The H2SO4 is used to dry the H2 gas, wet H2 will bang, dry will burn. This will also mean you can use steel wool for the flame arrester. Its always best to purge this system before use, the removal of all air is important, also try and keep this system out of the sun as the impurities both in the NaOH, H2O, and Al has been know to produce a catalytic reaction leading to BANG, apart from that it's safe. This used to be standard for producing medium volume of dry H2 gas in chemistry labs.
Deano