| 煤焦二氧化碳气化动力学研究(Ⅱ)非等温热重法 |
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| 引用本文： | 周静,龚欣,于遵宏.煤焦二氧化碳气化动力学研究(Ⅱ)非等温热重法[J].煤炭转化,2003,26(1):78-81. |
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| 作者姓名： | 周静 龚欣 于遵宏 |
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| 作者单位： | 华东理工大学洁净煤技术研究所,200237,上海 |
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| 基金项目： | 国家重点基础研究发展规划项目(G1999022103)和高等学校骨干教师资助计划项目. |
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| 摘 要： | 利用热失重仪以恒升温速率（非等温）法研究煤焦-CO2气化反应，并用Ozawa法和单一升温速率法来求解动力学参数。结果表明：Ozawa法和单一升温速率法求解得到的动力学参数差异大；单一升温速率法求得的不同升温速率下表观活化能和指前因子呈线性相关性；表现活化能随升温速率增加呈线性减小。
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| 关 键 词： | 煤焦 二氧化碳 气化动力学 研究 非等温热重法 恒升温速度 |
| 修稿时间： | 2002年4月13日 |
A STUDY OF CHAR-CO2 GASIFICATION PART( Ⅱ ) BY TEMPERATURE-PROGRAMMED THERMOGRAVIMETRY |
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| Zhou Jing Gong Xin and Yu Zunhong.A STUDY OF CHAR-CO2 GASIFICATION PART( Ⅱ ) BY TEMPERATURE-PROGRAMMED THERMOGRAVIMETRY[J].Coal Conversion,2003,26(1):78-81. |
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| Authors: | Zhou Jing Gong Xin and Yu Zunhong |
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| Abstract: | The temperature-programmed thermogravimetry was applied to the char-CO 2 reaction kinetics study.The TG and DTG profiles obtained at heating rates of 10 K/min,15 K/min,20 K/min,25 K/min,30 K/min,35 K/min.In this paper,kinetics parameters were calculated by Freeman method and Ozawa method.The result showed that the apparent activation energies of the char-CO 2 reaction at different heating rates are much different.The apparent activation energies( E ) have the linear relationship with the frequency factors( A ) calculated at different heating rates.Another conclusion was drawn that the higher heating rate is,the higher the peak temperature of DTG curve( T m) and the maxium reaction rate. |
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| Keywords: | coal char gasification CO 2 kinetics temperature-programmed thermogravi-metry |
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