A mixup occurred here ....
In reply#4 I was addressing Mrs Landsend. Sorry Don if you think I was attacking Al Gore for anything more than being 'Chicken Little'. Didn't mean to imply he was wrong. Only meant to say, I don't see his academia and thus his authority to make alarming speculation on science facts. He is an alarmist and a grandstander. But then save me the argument that by pointing out my academia would put me in the same oxymoron of the post #4. I realize that my friend, I truly do and I am laughing at myself for having done that.
Ok Don this is for you and et al. I could shoot numbers at you, but before I do consider the problems we face when experimenting with Hydrogen.
Here are the arguments against the hydrogen economy:
1. Terrestral hydrogen is ONLY an energy
carrier or transfer media and NOT a
substance capable of delivering net NEW
BTU's to the on-the-books economy.
2. Terrestral hydrogen creation is inefficient
as considerably more energy of usually
much higher quality has to be input than
is eventually returnable.
3. No large terrestral source of hydrogen gas
is known. Water, of course, is a hydrogen
sink and, by fundamental chemical energitics,
is the worst possible feedstock.
4. The CONTAINED energy density of terrestral
hydrogen by weight is a lot LESS than gasoline.
And drops dramatically as the tank is emptied.
The energy density of hydrogen gas by volume
is a ludicrous joke.
5. Virtually all bulk hydrogen is produced by methane
reformation. And thus is EXTREMELY hydrocarbon
dependent.
6. Hydrogen has the widest explosive range known,
the least spark energy required for ignition, and
has no known colorants or odorants. Its flame is
often invisible or nearly so.
7. There is more hydrogen in a gallon of gasoline
than there is in a gallon of liquid hydrogen.
8. No effective vehicle compatible means of hydrogen
storage is known that is remotely as cheap, safe,
dense, and convenient as carbon bonded hydrides.
9. No infrastructure exists for gaseous hydrogen
distribution. Pipelines in particular raise major
density and embrittlement issues.
10. Electrolysis from high value sources such as
grid, wind, or pv is totally useless as a hydrogen
source because of the staggering loss of exergy.
There ALWAYS will be more intelligent things
to do with the electricity.
11. Improper burning of hydrogen produces highly
polluting nitrous oxides.
12. Terrestrial hydrogen is basically a POLLUTION
AMPLIFIER that INCREASES the pollution of
its underlying sources. It is utterly ludicrous to
claim that hydrogen is in any manner, way,
shape, or form "nonpolluting".
13. Hydrogen rots most metals through embrittlement.
14. "Carbon Neutral" solutions would appear better
than "Carbon Free" because (A) A significant
measure of the energy of most fuels is in its carbon
fraction, (B) Carbon appears to be essential for
convenient and safe room temperature liquids,
and (C) Reformation is not required or else
is simpler, cheaper, and wastes less energy.
15. An optimal hydrogen storage solution exists by
carbon bonding as in heptane or iso-octane. Both
of these room temperature liquids ain't broke.
Don, on number 7, common sense would make you wonder why you would want to supplement or boost the effiency of gasoline whith hydrogen or less (Browns Gas) or oxyhydrogen which is over 4 times less the energy density.
The idea that gasoline combustion can be boosted with hydrogen is speculative at best. But HOO gas. Not a chance. NASCAR and FORMULA FUEL dragsters would be using it.
CP