[Stoves] Burning Char

[Stephen Joseph]

All

There is a considerable volume of literature in the combustion science
journals on filtration combustion.  It is due to chemisorption of O2
in the carbon lattice and catalytic oxidation around mineral matter.

This process has been extensively studied.

Stephen Joseph

On Mon, Oct 15, 2012 at 7:26 AM, Robert Lerner <bajarob at gmail.com> wrote:
> Hi Frank,
>
> I cannot answer to the "why" of spontaneous combustion of char, except to say that yours is not a unique experience. On two separate occasions in Costa Rica we experienced spontaneous combustion of bagged biochar, once with moderate damage to a transport vehicle (fortunately, smoke signals were detected before total disaster reigned).
>
> I searched the literature and found (apart from apocryphal tales of "human spontaneous combustion") mostly denials of char's auto-combustability. I also learned that US interstate transport regulations require fireproof containment of char.
>
> Point is, it will likely happen again (whether or not we can divine the "why"). Appropriate precaution advised.
>
> Rob Lerner
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