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In Reply to: Toyota poised to unleash another revolution, just like the Prius was. posted by tinear on November 19, 2014 at 07:05:31:
if we generate the hydrogen in situ (e.g., by electrolysis of water) in some sort of time/energy/cost-efficient manner.
that said...
I guess carrying a tankful of compressed hydrogen gas really isn't any scarier than carrying around 20 gallons of gasoline. I think there's a "Hindenburg effect" that makes folks like me a little extra-leery of hydrogen as a fuel (and probably irrationally so).
Energy density of the fuel is the bugear, methinks, for any alternatives to the good ol' fossil fueled internal combustion engine.
It's the big limiter for batteries (there's an absolute physical limit to how many watt-hours one can get from a battery per unit mass of the electrochemically-active species used).
I do wonder about the energy density of hydrogen (kcal per mole, or gram or gallon or whatever measure you prefer) vs. fuels like even gasoline (not to mention Diesel fuel, which packs a lot of available energy into a gallon of goop).
all the best,
mrh
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Follow Ups
- I think hydrogen power only becomes practical - mhardy6647 09:03:07 11/19/14 (6)
- "energy density" - b.l.zeebub 10:13:53 11/19/14 (5)
- good point - mhardy6647 11:41:38 11/19/14 (0)
- Didn't do any calcs... - YRY 11:17:58 11/19/14 (3)
- 'constantly venting H2 gas' - mhardy6647 11:43:23 11/19/14 (2)
- You're mistaking H2 with SO2. ;-) * - b.l.zeebub 07:01:26 11/20/14 (1)
- actually more like CH4 (which is odorless) and H2S (which ain't) :-) (nt) - mhardy6647 13:33:38 11/20/14 (0)
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