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beau · 24-06-2009, 17:41

We used to make hydrogen, for balloons etc by having a container of sodium hydroxide (caustic acid) and drop in pieces of waste Aluminium. (used soda cans) . I found out later that the sodium hydroxide acts as a catalyst and does not need replacing.
This is cheap hydrogen as long as you are not paying commercial prices for aluminium.

24-06-2009, 17:41	#35
beau Registered User Join Date: Dec 2006 Location: Brisbane Australia Posts: 371	hydrogen generator We used to make hydrogen, for balloons etc by having a container of sodium hydroxide (caustic acid) and drop in pieces of waste Aluminium. (used soda cans) . I found out later that the sodium hydroxide acts as a catalyst and does not need replacing. This is cheap hydrogen as long as you are not paying commercial prices for aluminium.