Thermal decomposition kinetics and characteristics of Spartina alterniflora via thermogravimetric analysis
Thermal decomposition kinetics and characteristics of Spartina alterniflora via thermogravimetric analysis
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DOI：
10.1016/j.renene.2014.01.041
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发表时间：
2014-08-01
期刊：
影响因子：
8.7
通讯作者：
Liu, Xiao-hong
中科院分区：
文献类型：
--
作者：
Liang, Yue-gan;Cheng, Beijiu;Liu, Xiao-hong
采用热重法研究了互花米草在5、10、20和40℃/min的氮气气氛下的热解过程。在200℃~ 360℃的温度范围内，光滑的草的主要失重是由于总挥发物的72% ~ 74%的释放。热解产物分布、热分解速率等热解特性随升温速率的变化有显著变化，但对挥发分总收率无显著影响。采用Friedman、Flynn-Wall-Ozawa （FWO）、Kissinger- akahira - sunose （KAS）和Kissinger四种无模型方法评估活化能。实验结果表明，Kissinger法得到的活化能与FWO法和KAS法测定的活化能平均值（183.6 ~ 183.4 kJ/mol）吻合较好。主图法结果表明，在活化能为183.5 kJ/mol的条件下，最可能的反应模型函数为f (a) = (1 - a)（3.37）。(C) 2014 Elsevier Ltd.版权所有。
Pyrolysis of Spartina alterniflora (smooth cordgrass) was investigated by thermogravimetric analysis in a nitrogen atmosphere at heating rates of 5, 10, 20, and 40 degrees C/min. Main weight-loss was observed in smooth cordgrass at temperatures ranging from 200 degrees C to 360 degrees C, owing to release of 72%-74% of total volatiles. Pyrolysis characteristics such as distribution of pyrolysis products and thermal-decomposition rate significantly changed based on heating rate, but had no significant effect on the total yield of volatile matters. Activation energy was evaluated by four model-free methods, namely, Friedman, Flynn-Wall-Ozawa (FWO), Kissinger-Akahira-Sunose (KAS), and Kissinger methods. Experimental results showed that the activation energy obtained from the Kissinger method was in agreement with the average value of activation energy (183.6 kJ/mol to 183.4 kJ/mol) determined by FWO and KAS methods. Results of the master-plots method indicated that the most probable reaction model function was f (a) = (1 - a)(3.37) under activation energy of 183.5 kJ/mol. (C) 2014 Elsevier Ltd. All rights reserved.