The stuff is also notoriously hard to store and carry around with you. It takes a pretty large very high pressure tank to hold H2 in gaseous form, or a very large, very cold tank to hold it in liquid form. It's also such a small molecule that few materials can hold it without leaking at least a little of it away, and all of the plumbing and valving required to move it around will be well nigh impossible to keep from leaking. Oh yeah...it's also some of the most volatile stuff in the universe, think rocket fuel and the element stars burn in their atomic fusion bellies.
I believe Billings Energy corporation in the 1970s invented a tank that would hold Hydrogen In a liguid form at room temperature. I dont remember the way they did it but basically it soaked into some kind of catalyst or something like that. The also did safety tests on these tanks by filling them full of Hydrogen and shooting incendiary tracer rounds into them. The Postal Service adapted an entire fleet of postal delivery vehicles in one of the towns in Utah I believe it was to burn hydrogen useing the Billings Energy tank. Billings Energy also made a small hydrogen plant for in home use that utilized eloctrolysis. Remember this was all done in the early 1970's. The drawback to the system is exactly what you mentioned Hydrogen is such a small molecule that it takes a lot of it to fill a combustion chamber enough to compress. The postal vehicles had most of the room behind the driver filled with tanks and only had a 75 mile range.
Oh yeah...it's also some of the most volatile stuff in the universe, think rocket fuel and the element stars burn in their atomic fusion bellies.
Isnt this kind of an extreme statement. I dont believe that the temperature and pressure needed to fuse hydrogen atoms together are going to be any danger that most of us are driving our vehicles through any time in the near future.
