New water power torch?

[about a water torch gas supply]

*gack!* the gas in a water torch is Wood's gas (a hydrogen-oxygen mixture) and it's explosive. You don't want to compress THAT. As for hydrogen, it can be liquefied or compressed into intercalation compounds (sponge-like material) for storage. The main problem is, both are slow processes because the generated heat has to be removed somehow (no hydrogen fillup in minutes at your auto filling station). Hydrogen also embrittles metals, and diffuses, it's NOT a well-behaved gas. Neither is oxygen, come to that.