| 褐煤热解平行反应动力学模型研究 |
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| 引用本文： | 张凯,由长福.褐煤热解平行反应动力学模型研究[J].中国电机工程学报,2011,31(17). |
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| 作者姓名： | 张凯 由长福 |
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| 作者单位： | 清华大学热科学与动力工程教育部重点实验室,北京市,海淀区,100084 |
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| 基金项目： | 国家自然科学基金项目(50432040)~~ |
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| 摘 要： | 采用热重分析方法对海拉尔和霍林河褐煤进行了等速升温热解实验研究.在无需预定子反应活化能分布和转化率的前提下,建立了新的热解平行反应模型,并利用所得到的热解实验数据,通过计算获得了褐煤热解动力学模型参数.模型中各子反应的活化能E主要分布在100-500 kJ/mol之间,而指前因子A主要在107到1026s-1之间,E与InA表现出了很好的线性关系,说明所建模型具有很好的动力学补偿效应.利用该热解动力学模型对两种褐煤的热解过程进行了预测,结果表明,该模型可实现热解中失重速率以及剩余质量曲线的准确预测,最大平均偏差均分别小于9.12%和0.73%.采用该模型对不同煤与实验条件下的热解过程进行了预测,结果均符合较好,表明该模型具有较宽的适用范围.
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| 关 键 词： | 褐煤 热解 平行反应模型 补偿效应 |
Research on the Parallel Reaction Kinetic Model of Lignite Pyrolysis |
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| ZHANG Kai
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YOU Changfu.Research on the Parallel Reaction Kinetic Model of Lignite Pyrolysis[J].Proceedings of the CSEE,2011,31(17). |
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| Authors: | ZHANG Kai YOU Changfu |
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| Affiliation: | ZHANG Kai,YOU Changfu(Key Laboratory for Thermal Science and Power Engineering of Ministry of Education,Tsinghua University,Haidian District,Beijing 100084,China) |
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| Abstract: | The pyrolysis of Hailaer and Huolinhe lignite was studied using thermogravimetric analysis.Without any assumptions for the activation energy distribution and conversion of sub-reaction,a new parallel reaction model of lignite pyrolysis was proposed.The kinetic parameters were obtained on the basis of experimental data.The calculated activation energy(E) was mainly spread over 100-500 kJ/mol,and the pre-exponential factor(A) was 107-1026 s?1.The good linear relationship between lnA and E showed the clear com... |
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| Keywords: | lignite pyrolysis parallel reaction model compensation effect |
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