[Stoves] Pyrolysis: No Air?

[Frank Shields]

I use the word gasification when talking about the gases produced and the word pyrolysis when referring to the production of biochar and the change to the biomass. I’m thinking the air introduced during TLUD is only for the purpose of increasing the temperature and not part of the definition. Could use outside heat to increase the temperature if available. And the secondary doesn’t count as that is just making use of the gases produced. 

So the TLUD is talked about both producing gases to cook and biomass changing to biochar. 

Crispin had a definition list some time back that I wish I had saved from my move out of the lab.

Frank



Frank Shields
franke at cruzio.com


> On May 16, 2015, at 3:50 PM, Dean Still <deankstill at gmail.com> wrote:
> 
> Hi All,
> When I look up the word pyrolysis I find the following:
> Pyrolysis is a thermochemical decomposition of organic material at elevated temperatures in the absence of oxygen (or any halogen). It involves the simultaneous change of chemical composition and physical phase, and is irreversible. The word is coined from the Greek-derived elements pyro "fire" and lysis "separating".
> However, I think that folks use it to describe what happens in a TLUD, etc? Isn't that gasification not pyrolysis because of the presence of some air?
> Best,
> 
> Dean
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