Properties, Kinetics and Pyrolysis Products Distribution of Oxidative Torrefied Camellia Shell in Different Oxygen Concentration

In order to find a feasible pretreatment method, the properties, kinetics and pyrolysis products of oxidative torrefied camellia shell (CS) have been investigated in present work. Different oxygen concentration of 0-8% have been performed in torrefaction atmosphere, and oxidative torrefaction would alter the cellulose crystals from I α to I β of CS and improve their hydrophobicity. The surface functional groups of torrefied CS have also undergone major changes. Based on the Flynn-Wall-Ozawa method and Distributed Activation Energy Model, torrefaction causes the pyrolysis activation energy to increase first and then decrease. According to the evaluated by Criado method, order of reaction and random nucleation have been identified as the most likely mechanism for thermal degradation of torrefied CS. In addition, Oxidative torrefaction would decrease the H 2 yield but improve the phenols compounds in pyrolytic products. The present work may provide a reference for the energy utilization of CS