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Isoconversional analysis on the non-isothermal decomposition kinetics of high energy oxidizer: potassium dinitramide (KDN)
Thermochimica Acta ( IF 3.1 ) Pub Date : 2020-12-01 , DOI: 10.1016/j.tca.2020.178789
Santhosh. G , Soumyamol. P.B , Reshmi. S , Sreejith. M

Abstract The thermal decomposition kinetics of an energetic oxidizer viz., potassium dinitramide (KDN) has been studied by non-isothermal thermogravimetry (TG) technique. The dependence of activation energy (Ea) on conversion (α) was evaluated using isoconversional method of Vyazovkin (VYZ). A strong dependence of Ea on α was observed, where the mean Ea value of 185.86 kJ/mol was obtained from VYZ. The classical Kissinger method has also been used to calculate the Ea for the decomposition of KDN. Isothermal conversion-time data was predicted from the kinetic parameters derived from the integral isoconversional method of Vyazovkin. The preexponential factor was calculated by a model-free estimate using the kinetic compensation effect. A mechanistic approach for the decomposition of KDN is proposed based on TG-MS studies, Raman spectroscopy and quantitative analysis of the decomposition products.

中文翻译:

高能氧化剂非等温分解动力学的等转化分析:二硝胺钾(KDN)

摘要 用非等温热重(TG)技术研究了高能氧化剂二硝酰胺钾(KDN)的热分解动力学。使用 Vyazovkin (VYZ) 的等转化方法评估活化能 (Ea) 对转化率 (α) 的依赖性。观察到 Ea 对 α 的强烈依赖性,其中 185.86 kJ/mol 的平均 Ea 值是从 VYZ 获得的。经典的 Kissinger 方法也已用于计算 KDN 分解的 Ea。等温转化时间数据是根据 Vyazovkin 积分等转化方法得出的动力学参数预测的。使用动力学补偿效应通过无模型估计计算指前因子。基于TG-MS研究提出了一种分解KDN的机理方法,
更新日期:2020-12-01
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