通过热重-红外联用技术在线分析研究了狼尾草在慢速升温条件下的热裂解行为和机理。结果表明，狼尾草的热分解主要发生在220～500 ℃，500 ℃以后热失重非常缓慢，在此温度下固体残留物的质量分数为5.33 ％。在线红外分析表明狼尾草热解产物主要有CO、CO2、烷烃、醛类、酸类等物质。根据热重曲线和红外谱图，将热解过程分阶段进行了热解动力学的研究,狼尾草热解3个阶段的活化能分别为301.51、88.39和330.58 kJ/mol。
Abstract
Pennisetum americanum pyrolysis behavior and mechanism were studied at a slow heating rate by thermogravimetric(TG) analysis coupled with fourier transform infrared spectroscopy (FTIR).The results showed that the decomposition of P. americanum mainly occurred at the temperature range of 220 to 500 ℃.The weight loss became quite slow when temperature further increased over 500 ℃ and the amount of residue finally decreased to 533 %. FTIR analysis showed that there were carbon dioxide, carbon monoxide, alkane, aldehydes,acids produced during the P. americanum pyrolysis process.Based on the TG curve and infrared spectra, P. americanum pyrolysis kinetic was studied. P. americanum pyrolysis process was divided into three stages, corresponding with 301.51, 88.39 and 330.58 kJ/mol for activation energy respectively.
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基金
收稿日期：2011-11-14修回日期：2012-04-24
基金项目：国家林业公益性行业科研专项项目(201004006)；江苏高校优势学科建设工程资助项目（PAPD）
第一作者：刘翔,实验师,博士生。*通信作者：张洋,教授。E-mail: yangzhang@126.com。
引文格式：刘翔,张洋,孙军,等.基于热重-红外联用技术的狼尾草热解过程分析[J].南京林业大学学报:自然科学版,2012,36(5):120-124.
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