六种树种枝叶的热解特性及动力学研究

Pyrolytic characteristics and kinetics research on six common tree species

利用热重分析法在氮气气氛条件下对南京市6种常见树种枝叶的热解行为进行研究。样品的热解反应可分为水分析出、快速热解、炭化3个过程。通过热失重率和热失重速率曲线分析样品的燃烧特性,由Coats-Redfern模型得出快速热解阶段的活化能和频度因子。根据分析和计算结果对6个树种枝叶的燃烧性进行排序,由大到小依次为火炬松>蓝冰柏>枇杷>女贞>香樟>桂花。

The pyrolytic characteristics of 6 common trees branches and leaves collected in Nanjing were studied on the stream of pure N2 conditions using thermo-gravimetric analysis.The results showed that the pyrolysis process of branches and leaves included three stages, namely drying, fast-pyrolysis and carbonization.The burn-ing characters were obtained through TG and DT Ganalysis tech- niques.And with the methods of Coasts-Redfern model, the activa- tion energy and frequency factor was figured out.The combustibili- ty of 6 trees branches and leavesin order from high to low were Pinustaeda L, Cupressus Blue Ice, Eriobotrya japonica, Ligustrum- lucidum, Cinnamomumcamphora and Osmanthusfragranss based on the experiment results and analysis.