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Kinetics Model Reconstruction for Multistep Overlapping Thermal Decomposition of Ammonium Perchlorate with and without the Copper Oxide Compound Catalyst
Combustion Science and Technology ( IF 1.7 ) Pub Date : 2020-06-22 , DOI: 10.1080/00102202.2020.1763324
Li Gong 1 , Yanpei Guo 1 , Lingchao Meng 1 , Jianmin Li 1 , Rongjie Yang 1
Affiliation  

ABSTRACT

The effects of copper oxide compound catalyst (Cu-O) on various stages of ammonium perchlorate (AP) thermal decomposition were investigated by TG. The results show that the thermal decomposition rate at the low-temperature section increases and the temperature at the maximum thermal decomposition rate (Tm) appears at 571 K when the Cu-O catalyst was added. The Tm at the high-temperature section is reduced from 660 K to 606 K. The thermal decomposition activation energy (Ea) of the whole process shows that the Ea of pure AP is significantly higher than that of AP+Cu-O when α > 0.25. According to the Gaussian peak-fit, the thermal decomposition of pure AP and AP+Cu-O can be divided into four stages. The Ea of each stage shows that the Cu-O catalyst has a significant catalytic effect on the first three stages of AP thermal decomposition, but has almost no catalytic effect on the fourth stage. According to the Coats-Redfern (CR) and masterplot method, the four stages of pure AP and AP+Cu-O are consistent with the n-order reaction F model and the Avrami-Eroféev (AE) model. Finally, the mechanism function reconstruction of four stages for pure AP and AP+Cu-O is completed by Arrhenius equation and kinetics compensation effect.



中文翻译:

高氯酸铵有无氧化铜复合催化剂多步重叠热分解动力学模型重建

摘要

通过TG研究了氧化铜化合物催化剂(Cu-O)对高氯酸铵(AP)热分解各个阶段的影响。结果表明,在低温部的增加的热分解速率和最大热分解速率(温度Ť中加入在Cu-O催化剂时)出现在571ķ。高温段的T m从 660 K 降低到 606 K。整个过程的热分解活化能(E a)表明E a当 α > 0.25 时,纯 AP 的显着高于 AP+Cu-O。根据高斯峰拟合,纯AP和AP+Cu-O的热分解可分为四个阶段。各阶段的E a表明Cu-O催化剂对AP热分解的前三个阶段有显着的催化作用,而对第四阶段几乎没有催化作用。根据 Coats-Redfern (CR) 和 masterplot 方法,纯 AP 和 AP+Cu-O 的四个阶段与 n 级反应 F 模型和 Avrami-Eroféev (AE) 模型一致。最后,通过Arrhenius方程和动力学补偿效应完成了纯AP和AP+Cu-O四个阶段的机理函数重构。

更新日期:2020-06-22
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