Existing models to describe the chemical reaction of lignocellulosic biomass are approximate in detail and empirical in nature . For pyrolysis and combustion, most attention has focussed on cellulose, and these models have propagated as archetype to lignocellulose, hemicellulose and lignins. The historical approach has been to arbitrarily partition "gears" of reactivity across structural attributes imposed to the kinetic model archi-tecture.