i can't resist but say how much i love and appreciate hydrogen and all it has done (disasters aside).
It truly is an amazing little (little) element.
In fact, it is so tiny, and explodes so fast that the flashback arrestors in blowtorches are too slow!!! (very scary)
I've been curiously and very sceptically looking at various claims of hydrogen powered systems for cars and generators and all online recently. Many of the most common claims, especially for cars, generate the hydrogen or gas (whatever they claim it is) on demand. In other words, they don't store it.
They then use a water "bubbler" as a substitute flashback arrestor. So the gas line is fed into the water, bubbles to the surface, and from there is collected to the engine. This is so that if there is a flash, it will stop at the bubbler and not go back into the electrolysers tank (bigger boom).
I have not really taken sides as yet. The people who make these so called generators and all don't sound too intelligent (they sound dodgy), but I've always looked at water as a source of power in a chemical sense. Just still to work out how...
It is the honour of God to conceal a matter, and the honour of kings to search it out.