Determination of Kinetic Parameters for the Thermal Decomposition of Parthenium hysterophorus
Determination of Kinetic Parameters for the Thermal Decomposition of Parthenium hysterophorus
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DOI：
10.1515/rtuect-2018-0001
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发表时间：
2018-02-01
影响因子：
1.4
通讯作者：
Rawat, Rekha
中科院分区：
文献类型：
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作者：
Dhaundiyal, Alok;Singh, Suraj B.;Rawat, Rekha
利用热重分析仪对银胶菊的热解过程进行了动力学研究。本研究调查的热降解和测定的动力学参数，如活化E和频率因子A使用无模型的方法由Flynn Wall和小泽（FWO），基辛格-Akahira-Sonuse（KAS）和基辛格，和模型拟合（Coats Redfern）。银胶菊热分解过程的研究结果表明，银胶菊的热分解主要经历脱水、主动和被动热解三个阶段。通过DTG热谱图表明，加热速率的增加导致最大失重速率处的温度峰向更高的温度区域移动。结果与Coats Redfern（积分法）和实验结果进行了比较，结果表明，从无模型方法获得的动力学参数值是吻合良好的。而Coats Redfern模型在不同升温速率下的计算结果并不理想，而扩散模型与实验数据拟合较好。
A kinetic study of pyrolysis process of Parthenium hysterophorous is carried out by using thermogravimetric analysis (TGA) equipment. The present study investigates the thermal degradation and determination of the kinetic parameters such as activation E and the frequency factor A using model-free methods given by Flynn Wall and Ozawa (FWO), Kissinger-Akahira-Sonuse (KAS) and Kissinger, and model-fitting (Coats Redfern). The results derived from thermal decomposition process demarcate decomposition of Parthenium hysterophorous among the three main stages, such as dehydration, active and passive pyrolysis. It is shown through DTG thermograms that the increase in the heating rate caused temperature peaks at maximum weight loss rate to shift towards higher temperature regime. The results are compared with Coats Redfern (Integral method) and experimental results have shown that values of kinetic parameters obtained from model-free methods are in good agreement. Whereas the results obtained through Coats Redfern model at different heating rates are not promising, however, the diffusion models provided the good fitting with the experimental data.