文献类型：期刊文献

中文题名：氢氧化锆热分解反应动力学研究

英文题名：Kinetic analysis of thermal decomposition of zirconium hydroxide

作者：孙敏达[1];朱志庆[1]

机构：[1]华东理工大学化工学院,上海200237

年份：2007

卷号：36

期号：12

起止页码：1211

中文期刊名：应用化工

外文期刊名：Applied Chemical Industry

收录：CSTPCD;;CSCD:【CSCD_E2011_2012】；

语种：中文

中文关键词：氢氧化锆;热分解;反应动力学;反应机理

外文关键词：zirconium hydroxide ; thermal decomposition ; kinetics ; reaction mechanism

摘要：热重研究结果表明,氢氧化锆热分解是一失重率为21.5%的一阶失重过程,失重峰值温度与差示扫描量热法分析吸热峰值温度基本吻合。在非等温条件下,采用单加热速率微分Achar和积分Coats-Redfern方程,结合多加热速率法Kissinger方程,以线性相关性和动力学参数的比较作为判断依据,推断Zr(OH)4热分解过程由化学反应机理控制,计算得到反应活化能E=52.30 kJ/mol,lg A=4.767。
Thermogravimetry results showed that thermal decomposition of zirconium hydroxide included only one weight loss stage,which gave a 21.5% rate of weight loss. The peak decomposition temperature was coincided with the peak endothermic temperature from DSC analysis. Under non-isothermal condition, by using Achar differential equation and Coats-Redfern integral equation that classified in single calefaction speed method together with Kissinger equation that classified in multi-calefaction speed method, the mechanism function was selected according to the linear dependence relation and the comparison between kinetics parameters. It could be concluded that the decomposition was controlled by chemical reaction mechanism F3 with the activation energy E is 52.30 kJ/mol and lg A = 4.767.