【摘要】 采用热重分析、差热分析及X射线衍射等技术研究了硝酸高铈铵的热分解过程 ,特别是用差热分析仪测试了不同升温速率下硝酸高铈铵在静止的空气气氛中的差热曲线 ,结合Kissinger法和Coats -Redfern法研究硝酸高铈铵的热分解动力学 ,计算了两个主要的反应阶段的表观活化能为 1 4 4 .61 ,1 2 4 .31kJ·mol- 1 ,并确定了反应级数、频率因子、速率常数 ,推导出每个反应阶段的动力学方程 ,控制反应过程的步骤分别为随机成核和随后生长 ,符合Arrami Erofeer方程。更多还原

【Abstract】 The technique of TG, DTA and XRD was used to study the process of thermal decomposition of cerium ammonium nitrate. In particular, the differential thermal analysis curves were measured at different heating rates in quiescent air atmosphere for decomposition of cerium ammonium nitrate. The kinetics of two processes was studied with both method of Kissinger and Coats-Redfern. The active energies for each reaction stage were respectively calculated to 144.61, 124.31 kJ·mol -1. The coefficients of reaction order and frequency factor were also determined, and kinetics equations of each reaction were established as well.更多还原