[Stoves] big TLUD

[Crispin Pemberton-Pigott]

AJH >Yes and/or premixing but why does burning rice hulls tend more to the
blue flame?

Lower volatiles? The carbon/hydrogen ratio is not the same as wood. Maybe
that helps.

Apparently the reactions can be shifted from CO to H2 by using different
catalysts:
Crispin

>From http://www.sciencedirect.com/science/article/pii/0141460786900727

Catalytic gasification of rice hull and other biomass. The general effect of
catalyst.

Abstract:
Thermochemical decomposition and catalytic conversion of rice hull and some
other cellulosic materials in a fluidized bed reactor containing different
catalysts as the bed material were studied. The use of catalyst invariably
gave gas yields above that of the non-catalyzed gasification process and
also changed the product distribution according to the nature of the
catalyst. Generally, an acidic catalyst favored the formation of carbon
monoxide and olefins while a supported-metal catalyst increased the amounts
of hydrogen and carbon dioxide. Nickel catalyst yielded as much as 60%
hydrogen at a reaction temperature of 650°C. The gas yield and product
distribution are mainly decided by the properties of the catalyst and less
by the properties of the biomass.