摘要
以东北地区常见的白桦、水曲柳、蒙古栎、银中杨、旱柳5种阔叶木的树叶为实验材料,采用热重分析法研究5种阔叶木树叶的热解特性及动力学特性。选取升温速率为10、15、20℃/min,粒径为40、60、80目,分析在氮气气氛下试样的热解特性,采用Gorbatchev积分法进行动力学研究。结果表明:试样的热解过程分为失水、轻微失重、主要失重和炭化4个阶段,其中主要失重阶段的失重量最多;5种试样的燃烧性排序为:银中杨>蒙古栎>旱柳>水曲柳>白桦,活化能排序为:白桦>水曲柳>旱柳>蒙古栎>银中杨;燃烧性越强的活化能越小;升温速率越高,热解反应的起始温度和终止温度越高,失重速率越快,热解反应越充分。
Pyrolysis process and dynamic characteristics of 5 common broad-leaf species in Northeast China, such as white birch,ashtree, mongolian oak, abele and salizmatsudana, was studied by thermogravimetric analysis. The heating rates were 10, 15, 20 ℃/min and particle sizes were 40, 60, 80 mesh. The pyrolysis process of experimental materials was analyzed in a nitrogen atmosphere and the kinetics was studied by Gorbatchev integral method. The experimental results showed that the pyrolysis process of the samples can be divided into 4 stages: water loss, slight weightlessness, main weightlessness and carbonation, among which the main weight loss stage had the most weight loss. The order of flammability of the 5 samples is as follows: abele > mongolian oak > salizmatsudana > ashtree > white birch, and the order of activation energy is as follows: white birch > ashtree > salizmatsudana > mongolian oak > abele. The stronger the flammability, the smaller the activation energy. The higher the heating rate, the higher the initial temperature and termination temperature of pyrolysis reaction,and the faster the weight loss rate, the more adequate the pyrolysis reaction.
作者
高飞飞
辛颖
王新然
李佳昕
GAO Fei-fei;XIN Ying;WANG Xin-ran;LI Jia-xin(College of Engineering and Technology,Northeast Forestry University,Heilongjiang Harbin 150040,China)
出处
《消防科学与技术》
CAS
北大核心
2020年第2期164-166,共3页
Fire Science and Technology
基金
中央高校基本科研业务费专项资金资助项目(2572015CB05)。
关键词
森林可燃物
热重分析
燃烧特性
动力学特性
forest fuel
thermogravimetric analysis
combustion characteristic
dynamic characteristics
