基于热重分析的南昌地区8种可燃物的热解动力学及燃烧性排序

Study on pyrolysis kinetics and combustibility ordering of 8 kinds of fuels in Nanchang area based on Thermogravimetric analysis

通过热重分析对江西省南昌市茶园山林场8种乔木凋落物进行热解特性和动力学研究，计算了热解参数和动力学方程中的活化能E和指前因子A，分别根据综纤维素的活化能和热解参数主成分得分两种方法对其燃烧性进行了排序。结果表明：8种森林可燃物的综纤维素分解阶段的活化能在11.71～47.78 kJ/mol之间，木质素分解阶段活化能在18.02～92.38 kJ/mol之间；不同可燃物之间、不同反应阶段之间的指前因子变化很大；应用主成分分析对这8种可燃物的燃烧性的从高到低的排序为阴香＞楠竹＞桂花＞雪松＞油茶＞香樟＞银杏＞鹅掌楸；而采用活化能进行的排序与此相反。

Pyrolysis characteristics and kinetics parameters of 8 fuels from Chayuanshan Forest Farm in Nanchang area, Jiangxi province were computed based on data from thermogravimetric analysis. Flammability of the 8 fuels were ranked by two methods, one based on activation energy of hollycellulose pyrolysis, the other based on scores of three principal components of the 7 pyrolysis parameters computed above. The results show that the activation energy values of the 8 fuels ranged from 11.71 to 47.78 kJ/mol in the hollycellulose pyrolysis phase, and 18.02～92.38 kJ/mol in the lignin pyrolysis phase; The pre-exponential factors varied very much among species; Theflammability of the 8 fuels from high to low based on principal component score ranked as followings： Cinnamomum burmanni〉Phyllostachys heterocycla〉smanthus fragrans〉Cedrus deodara〉Camellia oleifera Abel〉Cinnamomum camphora〉Ginkgo biloba〉Liriodendron chinensis. The ranking results by activation energy was contrary to that of with principal component score method.