A study on the isothermal decomposition kinetics of energetic cellulose-rich materials using a vacuum stability test

IF 1.7 4区化学 Q4 CHEMISTRY, PHYSICAL

Reaction Kinetics, Mechanisms and Catalysis Pub Date : 2024-08-12 DOI:10.1007/s11144-024-02706-x

Ahmed Fouzi Tarchoun, Djalal Trache, Amir Abdelaziz, Aimen Selmani, Hani Boukeciat, Mohamed Abderrahim Hamouche, Salim Chelouche, Yash Pal, Thomas M. Klapötke

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Abstract

In this work, the isothermal decomposition kinetics of a promising high-energy dense nitrated cellulose carbamate (NCC) was investigated, for the first time, using vacuum stability test (VST) at different isothermal temperatures. The kinetic triplet of NCC was calculated by model-fitting and model-free methods, and compared to that of the conventional nitrocellulose (NC). VST results showed that the gas pressure of the studied energetic cellulose-rich materials (NCC and NC) increased with the increase in time test, which is found more pronounced for NCC compared to NC. Furthermore, thermo-kinetic findings demonstrated that the Arrhenius parameters determined by the two performed kinetic approaches are in good concordance. Indeed, the apparent activation energy of NCC is found to be around 141 kJ/mol, which is lower than that of the common NC (Eα = 152 kJ/mol). The model-fitting approach revealed that the mechanism of isothermal decomposition of NCC and NC is controlled by a chemical process. Besides, a strong linear relationship between the activation energy and the logarithm of the pre-exponential factor is observed. This work provides valuable guidance for the isothermal decomposition kinetics of energetic cellulose-rich materials and further supports and complements their kinetic database.

Graphical abstract

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利用真空稳定性测试研究富含高能纤维素材料的等温分解动力学

本研究首次利用真空稳定性试验（VST）研究了一种前景广阔的高能致密硝化氨基甲酸纤维素（NCC）在不同等温条件下的等温分解动力学。通过模型拟合和无模型方法计算了 NCC 的动力学三重态，并与传统硝化纤维素（NC）的动力学三重态进行了比较。VST 结果表明，所研究的富含高能纤维素的材料（NCC 和 NC）的气体压力随着测试时间的延长而增加，其中 NCC 的气体压力比 NC 更明显。此外，热动力学研究结果表明，两种动力学方法确定的阿伦尼乌斯参数非常一致。事实上，NCC 的表观活化能约为 141 kJ/mol，低于常见的 NC（Eα = 152 kJ/mol）。模型拟合方法揭示了 NCC 和 NC 的等温分解机理是由化学过程控制的。此外，活化能与预指数的对数之间存在很强的线性关系。这项工作为富含高能纤维素材料的等温分解动力学提供了有价值的指导，并进一步支持和补充了其动力学数据库。

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来源期刊

Reaction Kinetics, Mechanisms and Catalysis CHEMISTRY, PHYSICAL-

CiteScore

3.30

自引率

5.60%

发文量

201

审稿时长

2.8 months

期刊介绍： Reaction Kinetics, Mechanisms and Catalysis is a medium for original contributions in the following fields: -kinetics of homogeneous reactions in gas, liquid and solid phase; -Homogeneous catalysis; -Heterogeneous catalysis; -Adsorption in heterogeneous catalysis; -Transport processes related to reaction kinetics and catalysis; -Preparation and study of catalysts; -Reactors and apparatus. Reaction Kinetics, Mechanisms and Catalysis was formerly published under the title Reaction Kinetics and Catalysis Letters.