| 用热分析技术研究煤的热解特性 |
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| 引用本文： | 解凤霞,张欣欣,张丹. 用热分析技术研究煤的热解特性[J]. 应用化工, 2012, 0(3): 430-434,437 |
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| 作者姓名： | 解凤霞 张欣欣 张丹 |
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| 作者单位： | 西安工程大学环境与化学工程学院 |
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| 基金项目： | 西安工程大学校博士基金资助项目(BS0902) |
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| 摘 要： | 用热分析技术研究了自洗蒙古煤和乌煤在氮气中的热解特性,探讨了升温速率和煤样粒径对热解过程的影响,根据煤热解产物释放特性指数r的大小来确定两种煤的热解性能。结果表明:同一升温速率下,自洗蒙古煤的热解特性要好于乌煤;同一种煤,升温速率越高,r值越大,热解特性越好。应用不同升温速率下的热解曲线计算出两种煤热解过程的动力学参数。用等转化率法求得热解过程的活化能;用主曲线法确定失重过程的最可几机理函数。
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| 关 键 词： | 煤 热解特性 热分析法 动力学 |
Study on the pyrolysis characteristics of coal using thermal analysis technique |
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| XIE Feng-xia,ZHANG Xin-xin,ZHANG Dan. Study on the pyrolysis characteristics of coal using thermal analysis technique[J]. Applied chemical industry, 2012, 0(3): 430-434,437 |
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| Authors: | XIE Feng-xia ZHANG Xin-xin ZHANG Dan |
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| Affiliation: | (College of Environment and Chemical Engineering,Xi’an Polytechnic University,Xi’an 710048,China) |
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| Abstract: | The pyrolysis characteristics of Zixi Mongolia coal and Wu coal were investigated using the thermogravimetry(TG) technique in N2 atmosphere.The influence of pyrolysis with different heating rate and different particle size was discussed.According to the release property index(r) of pyrolysis products of two kinds of coal,the coal pyrolysis property was determined.Results showed that pyrolysis characteristics of Zixi Mongolia coal was better than that of Wu coal with the same heating rate.For the same coal,the higher the heating rate was,the better the pyrolysis characteristics of the coal was.Pyrolysis kinetic parameters of two kinds of coal were obtained based on the pyrolysis curves.The iterative iso-conversional methods was applied to calculate the activation energy Ea and the most probable mechanism function G(α) was determined by means of the master plots method. |
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| Keywords: | coal pyrolysis characteristics thermal analysis kinetic |
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