A granular-biomass high temperature pyrolysis model based on the Darcy flow

Abstract

We established a model for the chemical reaction kinetics of biomass pyrolysis via the high-temperature thermal cracking of liquid products. We divided the condensable volatiles into two groups, based on the characteristics of the liquid prdoducts., tar and biomass oil. The effects of temperature, residence time, particle size, velocity, pressure, and other parameters on biomass pyrolysis and high-temperature tar cracking were investigated numerically, and the results were compared with experimental data. The simulation results showed a large endothermic pyrolysis reaction effect on temperature and the reaction process. The pyrolysis reaction zone had a constant temperature period in several layers near the center of large biomass particles. A purely physical heating process was observed before and after this period, according to the temperature index curve.

Keywords

biomass pyrolysis / high temperature pyrolysis model / condensable volatile cracking / Darcy flow

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Acknowledgments

This study was supported by the National Key Technology R&D Program (No. 2012BAK30B03) and the National Natural Science Foundation of China (Grant Nos. 41271543 and 41101564).

RIGHTS & PERMISSIONS

2014 Higher Education Press and Springer-Verlag Berlin Heidelberg