Ignition and combustion properties of NGO coated AlH3

IF 5.8 2区工程技术 Q2 ENERGY & FUELS

Combustion and Flame Pub Date : 2024-10-26 DOI:10.1016/j.combustflame.2024.113802

Xiaoyong Ding , Yitong Fang , Siqi Wang , Yao Zhou , Qiangqiang Liu , Yingle Liu , Ning Liu

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引用次数: 0

Abstract

AlH₃ is a highly promising additive for energetic materials and has gained considerable attention as a substitute fuel for aluminum in solid propellants. In order to improve its compatibility with energetic materials and oxidants, carbon coating materials are often used. Nitrated graphene oxide (NGO) was prepared and used as a surface modifier of α-AlH₃ in our study. Various analytical techniques were utilized to examine its structure and morphology, including Fourier-transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), particle size distribution (PSD) and X-ray diffraction (XRD). The oxidization, ignition characteristics, flame propagation behavior and heat of combustion of AlH₃ and AlH₃/NGO powder were investigated using differential thermal analysis (DTA), a laser igniter, a high-speed camera and an oxygen bomb calorimetry. Results show that NGO coating agent catalyzes the thermal decomposition and hydrogenation process of AlH₃, and accelerates the oxidation process of AlH₃. The addition of 4 % NGO decreases the oxidation activation energy of AlH₃ by about 8.94 %. The laser ignition energy of AlH₃/NGO is much lower than that of AlH₃, and the ignition energy decreases linearly as NGO is added from 1 % to 10 %. The flame development process supports the good thermal conductivity assistance effect of an appropriate amount of NGO in the combustion process of AlH₃ in air, which is consistent with the result of oxygen bomb test, indicating that the addition of NGO leads to an improvement in the combustion efficiency of AlH₃.This may provide valuable insights for the development of new high-energy solid propellants.

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非政府组织涂层 AlH3 的点火和燃烧特性

AlH3 是一种非常有前途的高能材料添加剂，作为固体推进剂中铝的替代燃料，它已经获得了相当多的关注。为了提高其与高能材料和氧化剂的兼容性，通常会使用碳涂层材料。在我们的研究中，制备并使用了硝化氧化石墨烯（NGO）作为 α-AlH3 的表面改性剂。研究采用了多种分析技术来检测其结构和形态，包括傅立叶变换红外光谱（FT-IR）、扫描电子显微镜（SEM）、粒度分布（PSD）和 X 射线衍射（XRD）。使用差热分析（DTA）、激光点火器、高速照相机和氧弹量热仪研究了 AlH3 和 AlH3/NGO 粉末的氧化、点火特性、火焰传播行为和燃烧热。结果表明，NGO 包覆剂催化了 AlH3 的热分解和氢化过程，并加速了 AlH3 的氧化过程。添加 4% 的 NGO 可使 AlH3 的氧化活化能降低约 8.94%。AlH3/NGO 的激光点火能比 AlH3 低得多，随着 NGO 的添加量从 1 % 到 10 %，点火能呈线性下降。火焰的发展过程证明了适量的NGO对AlH3在空气中的燃烧过程具有良好的导热助燃作用，这与氧弹试验的结果一致，表明NGO的加入导致了AlH3燃烧效率的提高。

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

Combustion and Flame 工程技术-工程：化工

CiteScore

9.50

自引率

20.50%

发文量

631

审稿时长

3.8 months

期刊介绍： The mission of the journal is to publish high quality work from experimental, theoretical, and computational investigations on the fundamentals of combustion phenomena and closely allied matters. While submissions in all pertinent areas are welcomed, past and recent focus of the journal has been on: Development and validation of reaction kinetics, reduction of reaction mechanisms and modeling of combustion systems, including: Conventional, alternative and surrogate fuels; Pollutants; Particulate and aerosol formation and abatement; Heterogeneous processes. Experimental, theoretical, and computational studies of laminar and turbulent combustion phenomena, including: Premixed and non-premixed flames; Ignition and extinction phenomena; Flame propagation; Flame structure; Instabilities and swirl; Flame spread; Multi-phase reactants. Advances in diagnostic and computational methods in combustion, including: Measurement and simulation of scalar and vector properties; Novel techniques; State-of-the art applications. Fundamental investigations of combustion technologies and systems, including: Internal combustion engines; Gas turbines; Small- and large-scale stationary combustion and power generation; Catalytic combustion; Combustion synthesis; Combustion under extreme conditions; New concepts.