摘要
利用热重分析技术对东北常见木材剩余物在高纯N2条件下的热解过程进行分析,研究不同粒径和升温速率对热解过程的影响。应用Coats-Redfern积分法对木材剩余物的热解过程进行动力学分析,采用y(α)-α主曲线法选择最概然的动力学机理函数,建立热解模型,同时计算相应的活化能和指前因子。结果表明,木材剩余物的热解动力学反应符合一级反应动力学模型。随着升温速率的增加,试样的热解曲线向高温侧偏移,失重速率曲线的峰值升高,峰幅变窄,呈尖高状。在20目和80目范围内,粒径对木材剩余物热解影响很小。
The pyrolysis characteristics of wood residue in northeastern region were studied using the thermogravimetric method in high N2 atmosphere.The influences of size and heating rate on the pyrolysis process were researched.The pyrolysis kinetics was used to describe the process by Coats-Redfern integral method,and the most appropriate kinetic mechanism function was selected by y （o）-o curve.The pyrolysis models were established,and pyrolysis kinetic parameters were calculated.The results showed that the kinetic processes could be simplified as a first-order reaction.The pyrolysis reaction was faster with the increase of the heating rate,and peak of weight loss rate curve rise.At the same time,peak amplitude narrowed down and had high peak shape.The diameter of particles had less effect in the pyrolysis process in the range of 20 mesh and 80 mesh.
出处
《实验室研究与探索》
CAS
北大核心
2014年第7期39-43,共5页
Research and Exploration In Laboratory
基金
中央高校基本科研业务费专项资金项目(DL12BB14)
关键词
木材剩余物
热解实验
动力学
wood residue
pyrolysis experiment
kinetic analysis
