Diesels Bio-Diesel.

[Huw Powell]

>>It's amazing how many lies pop up around alternative fuels.  Most of
>>the world still thinks the Hindenburg caught fire because it was
>>filled with hydrogen, and is convinced it is extremely dangerous,
>>when in reality it's far safer in almost every way compared to
>>gasoline.........
>
>
> Then I suppose this following article on Fuel Cell maintainace in UK is
> misinformation.....
> ********************************************************
> Hydrogen Gas
>
> Hydrogen is extremely flammable with flammability limits of 4 - 75% v/v in
> air. Hydrogen can form explosive mixtures with air, oxygen and chlorine. If
> waste gas is to be ignited to part fuel a heat transfer or reforming
> process, due care and attention must be given to the design and operation of
> the burner/combustor assembly.

The Hindenburg probably did not "catch fire" because it was filled with
hydrogen, that was because of some arcane detail of its construction.

It turned into a flaming orange fireball because of the hydrogen.

Gasoline is "dangerous," sort of.  It is difficult to actually get it to
catch on fire - think how tough it is to get a car to run when the fule
mixture is a bit off, especially at "room temerature."  It's much more
dangerous in a enclosed space, where it has time to get enough vapor
into the air to be an appropriate mixture.  Of course, you'll notice this.

Hydrogen burns upon contact with oxygen - no spark, no catalysts to
conflagration are necessary.  You can't smell it or see it.

Gasoline (for example) leaks that one can look at and light cigarettes
around with impunity would be ferocious fires/explosions if they were
hydrogen.

So what is required to make "fuel cells" safe?  Very well designed
connections for the hydrogen gas to flow through, and impact-proof
storage methods.  And then I read about people who drive around while
waiting to fix their obvious gasoline leaks (ok, I taped a note on the
steering wheel saying "do not turn key until FPR is removed" on my 'new'
87.5 cgt) and wonder how it will play out in practice on the public
highways...

A propane or natural gas leak can fill up a house, it still needs a
spark to set it off (which is why it has that stinky odor stuff added to
it).  A hydrogen leak will be apparent as a flame, which can have
interesting consequences....

Not saying it can't be implemented well, but there are things to be
careful of.

--
Huw Powell

http://www.humanspeakers.com/audi

http://www.humanthoughts.org/