[Stoves] The Blues

[Julien Winter]

Hi Folks;

Here is my 2-cents worth:

Rice hulls are about 20% oxides of silicon.  Their effect on flaming
pyrolysis could be catalytic.  The char formed could have a higher heat
capacity than mostly carbonaceous char, so the temperatures at the
migrating pyrolytic front  and above could be higher than in a fuel bed of
low-mineral biomass.

Pyrolysis will be fast  the hulls because they thin.

On this hypothesis, the volatiles will be a lower molecular weight than
from thicker, cellulosic fuel.

Premix the the rice-hull volatiles with secondary air, and *voir la*: a hot
blue flame with low formation of soot.

They make brickettes out of rice-hulls in Bangladesh using a screw press.
This partially torrified fuel burns a bit like charcoal.   It needs more
primary air than wood.

Cheers,
Julien

-- 
Julien Winter
Cobourg, ON, CANADA
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