Inhibitory effect and mechanism analysis of modified coal gangue powder on the methane–air explosion

IF 1.8 4区工程技术 Q3 Chemical Engineering

Asia-Pacific Journal of Chemical Engineering Pub Date : 2024-08-22 DOI:10.1002/apj.3147

Ke Yang, Xuerui Li, Hong Ji, Zhixiang Xing, Juncheng Jiang, Xinlong Ji

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引用次数: 0

Abstract

The application of industrial solid waste coal gangue (CG) in gas explosion suppression is explored, which opens up a new way for the resource utilization of CG. Two modified CG anti‐explosion agents, first‐grade modified CG (RCG) and second‐grade modified CG (MCG), were prepared by roasting activation and acid–base synergistic excitation. The explosion suppression performance of CG, RCG, and MCG was investigated through a 2.5 L semi‐closed explosion pipe. The experimental results were compared and analyzed, and their pyrolysis characteristics, phase composition, and particle size were analyzed to reveal their explosion suppression mechanism. It was proved that MCG had the best explosion suppression effect. Under the condition of 9.5% methane–air, it was found that the explosion suppression effect was most significant when the powder mass of the three powders was 300, 360, and 360 mg, respectively. The peak explosion overpressure is reduced by 10.51%, 21.96%, and 32.66%, respectively, and the peak arrival time of flame velocity is extended by .14 times, .20 times, and 1.15 times, respectively. MCG can effectively inhibit methane explosion utilizing physical and chemical synergistic heat absorption, porous structure formation barrier, heat isolation, oxygen dilution, adsorption, and capture of free radicals.

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改性煤矸石粉对甲烷-空气爆炸的抑制作用及机理分析

探索了工业固体废弃物煤矸石（CG）在抑制瓦斯爆炸中的应用，为煤矸石的资源化利用开辟了一条新途径。通过焙烧活化和酸碱协同激发制备了两种改性煤矸石防爆剂，即一级改性煤矸石（RCG）和二级改性煤矸石（MCG）。通过 2.5 L 半封闭爆炸管对 CG、RCG 和 MCG 的抑爆性能进行了研究。对实验结果进行了比较和分析，分析了它们的热解特性、相组成和粒度，揭示了它们的抑爆机理。实验证明，MCG 的抑爆效果最好。在 9.5% 甲烷-空气条件下，当三种粉末的粉末质量分别为 300、360 和 360 毫克时，抑爆效果最为显著。爆炸峰值超压分别降低了 10.51%、21.96% 和 32.66%，火焰速度的峰值到达时间分别延长了 0.14 倍、0.20 倍和 1.15 倍。MCG 可利用物理和化学协同吸热、多孔结构形成屏障、隔热、稀释氧气、吸附和捕捉自由基等作用，有效抑制甲烷爆炸。

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来源期刊

Asia-Pacific Journal of Chemical Engineering 工程技术-工程：化工

CiteScore

3.50

自引率

11.10%

发文量

111

审稿时长

2.8 months

期刊介绍： Asia-Pacific Journal of Chemical Engineering is aimed at capturing current developments and initiatives in chemical engineering related and specialised areas. Publishing six issues each year, the journal showcases innovative technological developments, providing an opportunity for technology transfer and collaboration. Asia-Pacific Journal of Chemical Engineering will focus particular attention on the key areas of: Process Application (separation, polymer, catalysis, nanotechnology, electrochemistry, nuclear technology); Energy and Environmental Technology (materials for energy storage and conversion, coal gasification, gas liquefaction, air pollution control, water treatment, waste utilization and management, nuclear waste remediation); and Biochemical Engineering (including targeted drug delivery applications).