Effect of cerium trifluoride on combustion properties of nano-aluminum powder

IF 5.8 2区工程技术 Q2 ENERGY & FUELS

Combustion and Flame Pub Date : 2024-11-05 DOI:10.1016/j.combustflame.2024.113831

Yajun Wang, Wenyu Li, Ruihua Liu, Zhengliang Deng, Qiang Gan

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Abstract

To investigate the influence of cerium trifluoride (CeF₃) on the combustion performance of nano aluminum powder (n-Al), different mass fractions of CeF₃ were physically mixed into the n-Al powder. Research results show that CeF₃ can significantly increase the main exothermic heat of n-Al powder. When the CeF₃ content was 10 %, the heat release reached 9579.90 J·g^‒1. However, as the CeF₃ content increased, the heat release of the sample decreased. Thermal analysis results of Al/CeF₃ and Al/CeO₂ infer that this was due to the action of CeO₂ generated by pre-ignition reaction for Al/CeF₃–15. The presence of CeO₂ inhibited the reaction degree of Al, thereby reducing the heat release. Meanwhile, as the proportion of CeF₃ increased, the peak temperature of the main reaction exothermic peak was delayed, and more energy input was required for the oxidation of n-Al powder. Combustion experiments show that the addition of CeF₃ greatly shortened the combustion time of n-Al powder, with the shortest time being 4.43 s. In addition, due to the excellent storage and release oxygen capability of CeO₂, multiple micro-explosions occurred in the composite material during combustion.

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三氟化铈对纳米铝粉燃烧特性的影响

为了研究三氟化铈（CeF3）对纳米铝粉（n-Al）燃烧性能的影响，将不同质量分数的 CeF3 物理混合到 n-Al 粉中。研究结果表明，CeF3 能显著提高 n-Al 粉末的主放热。当 CeF3 含量为 10 % 时，放热量达到 9579.90 J-g-1。然而，随着 CeF3 含量的增加，样品的放热量降低了。Al/CeF3 和 Al/CeO2 的热分析结果推断，这是由于 Al/CeF3-15 预点火反应产生的 CeO2 的作用。CeO2 的存在抑制了 Al 的反应程度，从而减少了热量的释放。同时，随着 CeF3 比例的增加，主反应放热峰的峰值温度推迟，正铝粉的氧化需要更多的能量输入。燃烧实验表明，CeF3 的加入大大缩短了 n-Al 粉末的燃烧时间，最短的时间为 4.43 秒。此外，由于 CeO2 具有优异的储氧和释氧能力，复合材料在燃烧过程中会发生多次微爆炸。

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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.