i think its time for a FAQ on this system.
Q: What is the amount of Iron sulphate or zinc sulphate And the amount of hydrochloric acid that should be combined.
A: the combination is ordinary galvanized steel, (Zn coated Fe) in a bath of Sulfuric Acid (H2SO4). hydrocloric acid is not used. when the reaction is finished, there will be an excess of hydrogen released (H2), and the byproducts are zinc sulfate(ZnSO4), iron sulfate (FeSO4), and iron (fe)
H2SO4 + Zn coated Fe = H2 + ZnSO4 + Fe SO4 + Fe
or
sulfuric acid combined with galvanized steel turns into hydrogen, zinc sulfate, iron sulfate, and iron.
also- ordinary battery acid is usually at a concentration of around 35%, or 35% acid and 55% water.
Q: What about the ammonia and the sulphates, How about keeping iron plates at cathode and zinc plates at the anode.
A: Some folks are playing with this very idea....once the reaction has slowed, consider applying a low voltage @ high amperage to quickly replate the metals, and start the reaction all over again.
Q: Also can I use urea instead of ammonia.
A:
http://en.wikipedia.org/wiki/Urea says that urea is (NH2)2CO...now while it has ammonia in it, its also inherently different because its also bonded to the carbon and oxygen in the molecule. that changes everything in a chemical reaction. NH3 or ammonia, is a gas, typically suspended(immersed/dissolved) in water. 35% is the highest concentration you can purchase and you need a special license here in the 'States. most industrial applications of NH3 carry a 20% solution. that will be just fine.
Q: You have also mentioned about the usage of glass lined fire extinguisers filled with Fe,Zn, and H2SO4.
A: the point of the fire extinguishers is the fact that they are ultra strong and cheap. glass lining them stops the acid from destroying the vessel, since they are made of iron. if one could find SS fire extinguishers, BINGO!
thats all i've got for now. should hopefully quell some emails folks have been getting. answering them on here will further educate everyone reading this.