| 纳米碳酸钙在非等温条件下热分解动力学及机理研究 |
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| 引用本文： | 刘润静,陈建峰,郭奋,吉米,沈志刚.纳米碳酸钙在非等温条件下热分解动力学及机理研究[J].中国化学工程学报,2003,11(3):302-306. |
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| 作者姓名： | 刘润静 陈建峰 郭奋 吉米 沈志刚 |
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| 作者单位： | Research Center of the Ministry of Education for High Gravity Engineering and Technolog，Beijing University of Chemical Technology，Beijing 100029，China，Research Center of the Ministry of Education for High Gravity Engineering and Technolog，Beijing University of Chemical Technology，Beijing 100029，China，Research Center of the Ministry of Education for High Gravity Engineering and Technolog，Beijing University of Chemical Technology，Beijing 100029，China，NanoMaterials，Research Center of the Ministry of Education for High Gravity Engineering and Technolog，Beijing University of Chemical Technology，Beijing 100029，China Technology Pte Ltd.，Block 26，Ayer Rajah Crescent # 07—02，Singapore 1339944 |
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| 基金项目： | Supported by the Key Research of Science ＆ Technology of Education(No.0202)and the Fundamental Research Plan of Huo
Yingdong(No.81063). |
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| 摘 要： | Experiments on thermal decomposition of nano-sized calcium carbonate were carried out in a thermo-gravimetric analyzer under non-isothermal condition of different heating rates (5 to 20K·min-1). The Coats and Redfern's equation was used to determine the apparent activation energy and the pre-exponential factors. The mechanism of thermal decomposition was evaluated using the master plots, Coats and Redfern's equation and the kinetic compensation law. It was found that the thermal decomposition property of nano-sized calcium carbonate was different from that of bulk calcite. Nano-sized calcium carbonate began to decompose at 640℃, which was 180℃lower than the reported value for calcite. The experimental results of kinetics were compatible with the mechanism of one-dimensional phase boundary movement. The apparent activation energy of nano-sized calcium carbonate was estimated to be 151kJ·mol-1 while the literature value for normal calcite was approximately 200kJ·mol-1. The order of magnitude of pre-e
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| 关 键 词： | 纳米碳酸钙 非等温条件 热分解机理 化学动力学 活化能 |
| 修稿时间： | |
Kinetics and Mechanism of Decomposition of Nano-sized Calcium Carbonate under Non-isothermal Condition |
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| LIU Runjing,CHEN Jianfeng,GUO Fen,YUN Jimmy,SHEN Zhigang.Kinetics and Mechanism of Decomposition of Nano-sized Calcium Carbonate under Non-isothermal Condition[J].Chinese Journal of Chemical Engineering,2003,11(3):302-306. |
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| Authors: | LIU Runjing CHEN Jianfeng GUO Fen YUN Jimmy SHEN Zhigang |
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| Affiliation: | Research Center of the Ministry of Education for High Gravity Engineering and Technology, Beijing University of Chemical Technology, Beijing 100029, China NanoMaterials Technology Pte Ltd., Block 26, Ayer Rajah Crescent # 07-02, Singapore 1339944 |
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| Abstract: | Experiments on thermal decomposition of nano-sized calcium carbonate were carried out in a |
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| Keywords: | nano-sized calcium carbonate non-isothermal decomposition kinetic mechanism |
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