Exploring the influence of metal oxides on the pyrolytic behavior and decomposition mechanism of the green gas generating agent 5-Aminotetrazole

IF 3.6 3区工程技术 Q2 ENGINEERING, CHEMICAL

Journal of Loss Prevention in The Process Industries Pub Date : 2024-11-06 DOI:10.1016/j.jlp.2024.105481

Shuna Zhao , Mi Li , Lin Jiang

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引用次数: 0

Abstract

5-Aminotetrazole (5AT) is widely used as a green gas-generating agent in fire extinguishers, but it exhibits low combustion stability. To enhance its combustion rate and modify gas production performance, this study investigated the catalytic effects of adding different metal oxides (Bi₂O₃, PbO, TiO₂, and CoO) on its pyrolysis process and decomposition mechanism. The pyrolysis behavior and pyrolysis products of 5AT were studied by simultaneous thermal analyzer (thermogravimetry - differential thermal analysis, TG-DTA) and TG-FTIR/MS (mass spectrometry and fourier transform infrared spectroscopy) hyphenated instrument. Isoconversional methods were used to calculated kinetic parameters, and reaction mechanism was also speculated by combining the experimental and calculational results. The experimental results indicated that Bi₂O₃, PbO, TiO₂ and CoO have minimal impact on the ring opening reaction process of 5AT, but they catalyzed the polymer decomposition process of 5AT, especially CoO. Consequently, the addition of metal oxides as catalysts to 5AT holds significant potential for improving its thermal safety and enhancing its suitability as a solid propellant gas generator.

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探索金属氧化物对绿色气体生成剂 5-氨基四氮唑热解行为和分解机理的影响

5-氨基四氮唑（5AT）作为一种绿色气体发生剂被广泛应用于灭火器中，但其燃烧稳定性较低。为提高其燃烧速率并改善气体生成性能，本研究探讨了添加不同金属氧化物（Bi2O3、PbO、TiO2 和 CoO）对其热解过程和分解机理的催化作用。热分析仪（热重-差热分析，TG-DTA）和 TG-FTIR/MS（质谱和傅立叶变换红外光谱）联用仪对 5AT 的热解行为和热解产物进行了研究。采用等转化法计算了动力学参数，并结合实验和计算结果推测了反应机理。实验结果表明，Bi2O3、PbO、TiO2 和 CoO 对 5AT 的开环反应过程影响很小，但对 5AT 的聚合物分解过程有催化作用，尤其是 CoO。因此，在 5AT 中添加金属氧化物作为催化剂，对于改善其热安全性和提高其作为固体推进剂气体发生器的适用性具有很大的潜力。

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

Journal of Loss Prevention in The Process Industries 工程技术-工程：化工

CiteScore

7.20

自引率

14.30%

发文量

226

审稿时长

52 days

期刊介绍： The broad scope of the journal is process safety. Process safety is defined as the prevention and mitigation of process-related injuries and damage arising from process incidents involving fire, explosion and toxic release. Such undesired events occur in the process industries during the use, storage, manufacture, handling, and transportation of highly hazardous chemicals.