Kinetic study of aspen during torrefaction

摘要: Using torrefied biomass, or biocoal, as a solid combustion fuel provides opportunity to introduce sustainable feedstock into the energy market. The decomposition of biomass biocoal is very complex chemical process, yet detailed understanding mechanistic changes that occur can allow for system control and optimization. Torrefaction lignocellulosic has been studied extensively, kinetic models have developed attempt describe observed behavior during Thermal Gravimetric Analysis (TGA) experiments, using slow heating rates. goal this paper was develop baseline semi-empirical model torrefaction aspen wood fast rates (1000 °C/s) GC–MS analysis. This rate adopted in order uncouple heat transfer kinetics. Having direct information about specific evolution affords insights torrefaction, along with opportunities improved process design control. proposed kinetics involves three sequential reactions which initially parent hemicellulose material produces gaseous products (CO CO2), water, organic acids (formic acetic) intermediate. next reaction further degrades intermediate stated products. final generates bio-coal product. We found characteristic times 0.99 min, 2.14 min 39.45 respectively at 300 °C. Improvements routes future investigation are also discussed.