[xshadow]

THinking at a combustion reaction like something that occurs in two steps:

1) thermal degradation of organic molecules on its elements  (C,S,H...) due to high temperature
2)  elements oxidation by O₂ to form CO₂, SO₂,H₂O

May have it sense?
Or it's wrong?

I think that those steps are much more compatible of a pyrolisis followed by an oxidation with a hot Oxygen flow
thanks

[Orcio_87]

Nothing degradates to the elements. Combustion goes by the free radical mechanism. The initiator is the singlet state oxygen.

[xshadow]

Nothing degradates to the elements. Combustion goes by the free radical mechanism. The initiator is the singlet state oxygen.

Thanks

ONe last thing...
The Sn can react with O₂ giving SnO /SnO₂2 .  The reaction is higly exotermic and is also an oxidation.

Can be considered a combustion reaction?

[Corribus]

You do see chemical decomposition in anoxic or low oxygen environments without combustion. In the case of organic substances, this usually results in soot or carbon generation and/or carbon monoxide generation. Thermal decomposition chemistry is complex, particularly in situations when fuels/substrates are not easily vaporized prior to combustion, in which case oxygen levels may be highly variable (e.g., burning wood).