Thermal decomposition behaviors and reaction mechanism of emulsion explosive with the addition of TiH2 powders

IF 6.4 2区工程技术 Q1 THERMODYNAMICS

Case Studies in Thermal Engineering Pub Date : 2025-01-01 DOI:10.1016/j.csite.2024.105583

Rong Liu , Xu-Guang Wang , Hao Wang , Quan Wang , Yang-Fan Cheng

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引用次数: 0

Abstract

To explore compatibility and thermal stability of the emulsion explosive added with TiH₂ powders, the actions of TiH₂ powders on the thermal decomposition properties, reaction product compositions of the emulsion explosives were researched by TGA-FTIR, TG-DSC, XRD and XPS. The results manifested that the adding of 7.6 μm TiH₂ powders in the range of 2–8 mass% could reduce the initial decomposition temperature of the emulsion explosive and promote the thermal decomposition reaction. The apparent activation energies of pure emulsion explosive sample were 110.5 and 107.05 kJ/mol, respectively. When the addition of 7.6 μm TiH₂ powders to emulsion explosive was 2 mass%, the apparent activation energy decreased to the minimum value, which were 100.1 and 95.9 kJ/mol, respectively. While the initial decomposition temperatures and the activation energies of explosive samples added with TiH₂ powders with particle sizes of 33.7, 50.1 and 120.0 μm both continued to rise. Furthermore, based on the experimental results, the thermolysis mechanism of emulsion explosive added with TiH₂ powders was proposed. This study is helpful to further understand the thermolysis properties and reaction mechanism of emulsion explosives containing TiH₂ powders, and offer theoretic direction for the formulation optimization as well as industrial production of high-energetic emulsion explosives.

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TiH2粉末对乳化炸药热分解行为及反应机理的影响

为了探究掺TiH2粉末对乳化炸药的相容性和热稳定性，采用热重分析仪（TGA-FTIR）、热重分析仪（TG-DSC）、x射线衍射仪（XRD）和x射线能谱仪（XPS）研究了TiH2粉末对乳化炸药热分解性能和反应产物组成的影响。结果表明：加入质量%为2 ~ 8的7.6 μm TiH2粉末可以降低乳化炸药的初始分解温度，促进热分解反应；纯乳化炸药样品的表观活化能分别为110.5和107.05 kJ/mol。当7.6 μm TiH2粉末添加量为2质量%时，乳化炸药的表观活化能降至最低，分别为100.1和95.9 kJ/mol。而颗粒尺寸分别为33.7、50.1和120.0 μm的TiH2粉末的初始分解温度和活化能均持续升高。在此基础上，提出了TiH2粉末对乳化炸药的热裂解机理。该研究有助于进一步了解含TiH2粉末的乳化炸药的热解性能和反应机理，为高能乳化炸药的配方优化和工业化生产提供理论指导。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Case Studies in Thermal Engineering Chemical Engineering-Fluid Flow and Transfer Processes

CiteScore

8.60

自引率

11.80%

发文量

812

审稿时长

76 days

期刊介绍： Case Studies in Thermal Engineering provides a forum for the rapid publication of short, structured Case Studies in Thermal Engineering and related Short Communications. It provides an essential compendium of case studies for researchers and practitioners in the field of thermal engineering and others who are interested in aspects of thermal engineering cases that could affect other engineering processes. The journal not only publishes new and novel case studies, but also provides a forum for the publication of high quality descriptions of classic thermal engineering problems. The scope of the journal includes case studies of thermal engineering problems in components, devices and systems using existing experimental and numerical techniques in the areas of mechanical, aerospace, chemical, medical, thermal management for electronics, heat exchangers, regeneration, solar thermal energy, thermal storage, building energy conservation, and power generation. Case studies of thermal problems in other areas will also be considered.