[flantoons]

Hello,
 
I need to mix 2 chemicals together to create a gas.(either explosively or gradually)
This gas will fill a chamber and be under pressure, then be used to drive a "steam" engine.
Maybe recover the gas after it has been used.
 
What chemicals can I use for this? Any ideas please?
 
Thanks,
 
Mike UK.
A sketch is here:
http://flantoons.co.uk/chemical-engine01.jpg

[NaOH]

You could use:

sodium carbonate or sodium bicarbonate and an acid (makes CO2)
aluminum with hydrochluric acid (makes Hydrogen)

aluminum with NaOH (makes hydrogen)

[praveenkphoenix]

may be an easy way is that better use calcium carbide with water through which a large quantity of acetylene will be produced with pressure within no time and is very economical