论文部分内容阅读
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。
Using 3,5-dinitrosalicylic acid and cerium nitrate as raw materials, cerium 3,5-dinitrosalicylate (CeDNS) was prepared and characterized by elemental analysis, X-ray fluorescence spectroscopy and FTIR. The thermal decomposition mechanism of 3,5-dinitrosalicylic acid cerium was studied by means of TG and DSC as well as temperature-controlled solid phase in-situ reaction cell / Fourier transform infrared spectroscopy (RS-FTIR). The main exothermic reaction DSC The peak was mathematically processed and kinetic parameters and kinetic equations were calculated. The results showed that the decomposition of 3,5-dinitrosalicylic acid cerium has three stages, including a dehydration endothermic process and a main exothermic process. The main decomposition reaction takes place in the second stage. The main decomposition reaction table The activation energy Ea and pre-exponential factor A were 159.17 kJ · mol-1 and 1011.33 s-1, respectively. The reaction mechanism of the main decomposition stage obeys the Avrami-Erofeev equation (n = 1/4), the kinetic equation of the main decomposition reaction Is: dα / dt = 1011.33 × 4 (1-α) [- ln (1-α)] 3 / 4e-1.92 × 10 4 / T.