引用本文:
张衡, 赵凤起, 仪建华, 张晓宏, 胡荣祖, 徐司雨, 任晓宁. 3-硝基邻苯二甲酸锆的制备﹑热分解机理及非等温反应动力学[J]. 物理化学学报,
2008, 24(12): 2263-2267.
doi:
10.3866/PKU.WHXB20081219
Citation: ZHANG Heng, ZHAO Feng-Qi, YI Jian-Hua, ZHANG Xiao-Hong, HU Rong-Zu, XU Si-Yu, REN Xiao-Ning. Preparation, Thermal Behavior and Non-isothermal Decomposition Reaction Kinetics of Zr(3-NO2-PHT)2·2H2O[J]. Acta Physico-Chimica Sinica, 2008, 24(12): 2263-2267. doi: 10.3866/PKU.WHXB20081219
Citation: ZHANG Heng, ZHAO Feng-Qi, YI Jian-Hua, ZHANG Xiao-Hong, HU Rong-Zu, XU Si-Yu, REN Xiao-Ning. Preparation, Thermal Behavior and Non-isothermal Decomposition Reaction Kinetics of Zr(3-NO2-PHT)2·2H2O[J]. Acta Physico-Chimica Sinica, 2008, 24(12): 2263-2267. doi: 10.3866/PKU.WHXB20081219
3-硝基邻苯二甲酸锆的制备﹑热分解机理及非等温反应动力学
摘要:
用3-硝基邻苯二甲酸、氢氧化钠和硝酸氧锆为原料, 制备了3-硝基邻苯二甲酸锆, 采用元素分析、X射线荧光衍射和FT-IR对其结构进行了表征. 用TG-DTG以及变温固相原位反应池/傅里叶变换红外光谱(RSFT-IR)联用技术研究了3-硝基邻苯二甲酸锆的热分解机理, 对主分解反应的DTG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-硝基邻苯二甲酸锆的分解反应总共有4个阶段, 其中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158.84 kJ·mol-1和109.85 s-1, 主分解阶段的反应机理服从一级Mample法则, 主分解反应的动力学方程为dα/dt=109.85(1-α)e-1.91×104/T.
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关键词:
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3-硝基邻苯二甲酸锆
- / 热分解机理
- / 非等温反应动力学
English
Preparation, Thermal Behavior and Non-isothermal Decomposition Reaction Kinetics of Zr(3-NO2-PHT)2·2H2O
Abstract:
Zirconium 3-nitrophthalate (Zr(3-NO2-PHT)2·2H2O) was synthesized using 3-nitrophthalic acid, sodium hydroxide, and zirconyl nitrate as raw materials. Its structure was determined by elemental analysis, X-ray fluorescence and FT-IR spectra. The thermal decomposition mechanism and kinetic parameters of the decomposition reaction for Zr(3-NO2-PHT)2·2H2O were investigated by temperature-programmed TG-DTG and condensed-phase thermolysis/FT-IR techniques. A kinetic equation for the decomposition reaction was obtained. The results showed that Zr(3-NO2-PHT)2·2H2O underwent a four-stage decomposition process and that the main decomposition reaction occurred during the second process. The apparent activation energy (Ea) and pre-exponential factor (A) of the main decomposition reaction are 158.84 kJ·mol-1 and 109.85 s-1, respectively. The kinetic equation can thus be expressed as: dα/dt=109.85(1-α)e-1.91×104/T.
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