Study of cellulose pyrolysis using an in situ visualization technique and thermogravimetric analyzer
Study of cellulose pyrolysis using an in situ visualization technique and thermogravimetric analyzer
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DOI：
10.1016/j.jaap.2011.11.016
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发表时间：
2012-03
影响因子：
6
通讯作者：
Zhu Guangyong;X. Zhu;Zuobing Xiao;Fengping Yi
中科院分区：
文献类型：
--
作者：
Zhu Guangyong;X. Zhu;Zuobing Xiao;Fengping Yi
利用CCD摄像监控系统和拉曼光谱技术，在显微镜下对石英毛细管中的纤维素转化过程进行了原位可视化研究。可以直接观察到热解反应中纤维素转化的过程和温度。反应的现场可视化揭示了纤维素在热解过程中如何同时产生和排出油。原位可视化结果是纤维素热解转化的第一个直接证据。在高纯度氮气气氛下，以5℃/min的升温速率，用热重分析仪从室温到500℃研究热解特性。结果表明，该热降解过程分为三个阶段。以表观活化能和指前因子确定了反应动力学参数。
A technique has been developed to study cellulose pyrolysis by in situ visualization of cellulose transformation in a quartz capillary under a microscope using a CCD camera monitoring system and Raman spectroscopy. The processes and temperature of cellulose transformation during pyrolysis reaction can be observed directly. In situ visualization of reaction revealed that how oil is generated and expulsed concurrently from cellulose during pyrolysis. The in situ visualization result is the first direct evidence to show cellulose pyrolysis transformation. Pyrolysis characteristics were investigated under a highly purified N2atmosphere using a thermogravimetric analyzer from room temperature to 500°C at the heating rate of 5°C/min. The results showed that three stages appeared in this thermal degradation process. Kinetic parameters in terms of apparent activation energy and pre-exponential factor were determined.