Re: Exxon-Jihadist Insurgent Plants Another IED Lie-Bomb about Hydrogen

Josh Hill wrote:
On Tue, 11 Jul 2006 12:51:43 -0600, Mike McWilliams <mmcwill@xxxxxxx>
wrote:


PV wrote:

joshuaphill@xxxxxxxxx writes:


And at 150 psi you need a 142 liter tank to store 5 kwh,
roughly equivalent to two cups of diesel.

No reason to think that the storage problem is insurmountable, though.


Other than the laws of physics and the characteristics of the element. *


but if you could just get it to become part of a solid.... or maybe a liquid like gasoline... then it would be easier to handle, and would probably have some sort of useful energy density.

/me has too much time on his hands


Excellent guess, actually: do a search for "metal hydrides."

That being said, one doesn't have to use metal hydride storage, which
is still in the lab, to store useful quantities of hydrogen. Cryogenic
storage does it, and so does compression, and both technologies are
currently in use. Hell, the first was used just the other day to
launch the space shuttle.

Both waste some energy. Cryogencially stored hydrogen boils off
gradually, meaning that if you don't use your car it gradually loses
its fuel supply. Pressurized hydrogen can't yet provide the driving
ranges that we're used to without crimping vehicle design. Which is to
say that there are problems still to be solved, but what we're talking
about is R&D rather than any fundamental physical roadblock.

I prefer to let nature do the R+D... That way, I don't have to come up with ideas that don't work as well.

Nature has found that long chain fatty acids work pretty good, and that hydrogen with a carbon backbone is a good way to store energy, because the products of combustion can be vented to the atmosphere or left on the ground without destroying the environment.
.

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