Stoich is.....

[Bruce]

Ah, so it's a theortical deal,
just like never never land.
Something to keep engineers employed
Bruce



----- Original Message -----
From: "Les Newell" <les at lnewell.screaming.net>
To: <diy_efi at diy-efi.org>
Sent: Thursday, September 06, 2001 3:03 PM
Subject: Re: Stoich is.....


> Stoich is when the end result is as fully reacted as possible
> The ideal reaction for methane is
> 1 CH4 + 2 O2  -> 1 CO2 + 2 H2O
> Both CO2 and H2O are stable and will not easily react further.
>
> If you have too much fuel you end up with:
> 2 CH4 + 3 O2  -> 2 CO + 4 H2O
> CO will easily react with oxygen.
>
> If you have too much oxygen you end up with:
> 2 CH4 + 5 O2  -> 2 CO2 + 4 H2O + O2
> The O2 will obviously react with any fuel available
>
> In practise of course the reactions are not as clear cut as the mixture
> never fits the equations perfectly so you will get combinations of the
above
> reactions depending on the exact air/fuel mix.
>
> Les
>
> >
> > then it's not an equation, both sides still have to equal each other.
> > Right, just means the first definition given is wrong.
> > Bruce
> >
> > From: "Les Newell" <les at lnewell.screaming.net>
> > Subject: Re: Stoich is.....
> > > Yes, overall there are still the same number of atoms going down the
> > exhaust
> > > as come in throught the intake. However, if the air/fuel ratio is not
at
> > > stoich then there will be spare atoms that don't fit into the
equation,
> so
> > > you will have unburnt fuel or unused oxygen.
> > > Les
> >
> > > > Unless your turning mass into energy, the number of atoms will
always
> > > > balance.  least to my way of thinking
> > > > Bruce
> >
> > > > From: <A70Duster at aol.com>
> > > > Subject: Stoich is.....
> > > > > Stoich is.....when there is a balance of elements on the left side
> and
> > > > right side of the "equation" Methane and oxygen (unbalanced)
> > > > >
> > > > > CH4 +  O2  ->  CO2 + H20
> > > > >
> > > > > The stoichiometric equation is when the number of atoms on the
left
> > > equal
> > > > the number of atoms on the right. so
> > > > >
> > > > > 1 CH4 + 2 O2  -> 1 CO2 + 2 H2O
> > > > > Seldom is there 100% complete combustion.
> > > >
> > > >
> > >
> >
>
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