[Stoves] Thickness of flame front

[IPC]

"Some carbon-carbon bonds are so strong the carbon won't burn, diamond
decomposes to graphite at 1200C but it doesn't burn."

Really?  The only diamond I ever found was identified by a mineralogist.
When I doubted his identification, he said "Watch!", lit a bunsen burner,
put my stone on the end of a spatula and - Poof! "What have you done with my
diamond?" I shrieked. "Burned it," he said,"You aren't allowed to have uncut
diamonds without a license in any event."

Don't leave your wife's jewels around in a fire.

(Dr)Philip Lloyd
Energy Research Centre
University of Cape Town
Private Bag Rondebosch 7701
South Africa
Tel +27 (0)21 650 3896
Fax +27 (0)21 650 2830
 



-----Original Message-----
From: stoves-bounces at listserv.repp.org
[mailto:stoves-bounces at listserv.repp.org] On Behalf Of AJH
Sent: 18 January 2008 09:14
To: frank at compostlab.com; Discussion of biomass cooking stoves
Subject: Re: [Stoves] Thickness of flame front

On Fri, 18 Jan 2008 10:10:47 -0800, frank wrote:

>Greetings Andrew,
>Like the Microsoft game that comes with new computers called 
>Minesweeper  ( 
>http://www.mobygames.com/game/win3x/minesweeper/screenshots ) or better 
>for us the 3D version  ( http://www.softsession.com/ ) we need a 
>program to tell us how well a fuel will burn.

I'm certain that such a tool exists, please remember my last chemistry
lessons were over 40 years ago, so you'll have to forgive me for not being
up to date.


> Frans (of the famous Frans &
>Martin team) mentioned it takes as much energy to put a bond together 
>as it does to take it apart.

Yes, this is fundamental, energy is conserved in a chemical process.

>So if you have a carbon with four bonds it must have the energy of four 
>bonds breaking around it for it to combust.

This depends what it is currently bonded to, what is the carbon bonding in
an amorphous carbon such as the char we discuss?

Some carbon-carbon bonds are so strong the carbon won't burn, diamond
decomposes to graphite at 1200C but it doesn't burn.

<snip>

>  Do you think you could make such a
>program? Anything to add? :)

I cannot even visualise a rubics cube arrangement when it's in my hand so
I'm sure I couldn't do this. You may be on to something, a visual method of
describing combustion, but it's out of my depth I'm afraid.

AJH


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