Simple charcoal kiln
Folke Gunther, April 24, 2008
A wonderfully simple method for making charcoal at home or on the allotment.
There is a wide demand for charcoal kilns to be used by anybody having an allotment or garden sized plot. The idea of making char of surplus biomass instead of firing it is widely spread in Latin America (and Japan?). Burning the pyrolysis gasses instead of emitting them makes the method comparatively safe, although not efficient regarding their potential utilisation of gasses.
I agree that his is a very small scale method, bu imagine 2 billion people having it, making 1 kg char a week for their lots. That would imply about 0.1 Gt annually, or 5% of what would be necessary to sequester for making a change.
Naturally, this is not the method to save the world from entering a tipping point, but it could well be of some help.