| 3，5-二硝基水杨酸铈的制备﹑热分解机理及非等温反应动力学(英文) |
| Preparation, Thermal Behavior and Nonisothermal Decomposition Reaction Kinetics of Cerium 3,5-dinitrosalicylate(CeDNS) |
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| 摘要: 用3，5-二硝基水杨酸和硝酸铈为原料，制备了3，5-二硝基水杨酸铈(CeDNS)，采用元素分析、X射线荧光光谱和FTIR对其进行了表征。用TG和DSC以及变温固相原位反应池/傅立叶变换红外光谱(RS-FTIR)联用技术研究了3，5-二硝基水杨酸铈的热分解机理，对主放热反应的DSC峰进行了数学处理，计算得到了动力学参数和动力学方程。结果表明，3，5-二硝基水杨酸铈的分解反应共有3个阶段，其中包括一个脱水吸热过程和一个主放热过程，主分解反应发生在第2阶段，主分解反应的表观活化能Ea与指前因子A分别为：159.17 kJ·mol-1 和1011.33 s-1，主分解阶段的反应机理服从Avrami-Erofeev方程(n=1/4)，主分解反应的动力学方程为：dα/dt=1011.33×4(1-α)[-ln(1-α)]3/4e-1.92×104/T。 |
| 关键词: 3，5-二硝基水杨酸铈 热分解机理 非等温反应动力学 |
| 基金项目: |
| Abstract: Cerium 3,5-dinitrosalicylate(CeDNS) was synthesized by using 3,5-dinitrosalicylic acid, sodium hydroxide and cerium nitrate as raw materials, and was characterized by elementary analysis, X-ray fluorescence and FTIR spectraoscopy. The thermal decomposition mechanism and kinetic parameters of the decomposition reaction of CeDNS were investigated by means of TG/DSC and in situ condensed phase thermolysis/FTIR(RS-FTIR). The kinetic equation of decomposition reaction was obtained. The results show that the decomposition process of CeDNS has three stages and the main exothermic decomposition reaction occurs in the second process. The kinetic parameters of the main exothermic decomposition reaction are: Ea=159.17 kJ·mol-1, A=1011.33 s-1. The kinetic equation can be expressed as: dα/dt=1011.33×4(1-α)[-ln(1-α)]3/4e-1.92×104/T. |
| Keywords: CeDNS thermal decomposition mechanism nonisothermal reaction kinetics |
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| 摘要点击次数: 1399 |
| 全文下载次数: 1905 |
| 张 衡,赵凤起,仪建华,张晓宏,胡荣祖,徐司雨.3，5-二硝基水杨酸铈的制备﹑热分解机理及非等温反应动力学(英文)[J].无机化学学报,2009,25(5):869-874. |
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