Inhibition mechanism of an expandable chemical inhibitor on aluminum dust explosions

IF 4.5 2区工程技术 Q2 ENGINEERING, CHEMICAL

Powder Technology Pub Date : 2025-02-28 DOI:10.1016/j.powtec.2025.120855

Songling Jin, Wei Gao, Mingshu Bi, Haipeng Jiang, Fengyu Zhao, Tianjiao Zhang

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引用次数: 0

Abstract

In this study, an expandable chemical inhibitor was development synthesized using the mechanical alloying technique to mitigate aluminum dust explosions. The inhibition mechanism of aluminum dust explosion was further explored through numerical simulations. The results indicate that KHCO₃-EG powder achieved a maximum reduction of 89.85 % for flame propagation velocity. KHCO₃-EG compound powder formed a barrier that obstructed O₂ access and reduced heat transfer effects between powder particles by creating a dense, porous carbon layer with a worm-like structure. KHCO₃-EG compound powder absorbed heat produced during the combustion of aluminum particles, undergoing thermal decomposition to produce K-containing products. Kinetic simulations demonstrated that the composite inhibitor significantly decreased the concentrations of AlO and O, leading to stable O₂ formation. Catalytic cycles (K⇔KO and KO⇔KO₂) further decreased O atoms, lessening collisions between active groups and reducing explosive intensity. The study contributes theoretical and technical support for preventing and controlling aluminum dust explosion disasters.

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来源期刊

Powder Technology 工程技术-工程：化工

CiteScore

9.90

自引率

15.40%

发文量

1047

审稿时长

46 days

期刊介绍： Powder Technology is an International Journal on the Science and Technology of Wet and Dry Particulate Systems. Powder Technology publishes papers on all aspects of the formation of particles and their characterisation and on the study of systems containing particulate solids. No limitation is imposed on the size of the particles, which may range from nanometre scale, as in pigments or aerosols, to that of mined or quarried materials. The following list of topics is not intended to be comprehensive, but rather to indicate typical subjects which fall within the scope of the journal's interests: Formation and synthesis of particles by precipitation and other methods. Modification of particles by agglomeration, coating, comminution and attrition. Characterisation of the size, shape, surface area, pore structure and strength of particles and agglomerates (including the origins and effects of inter particle forces). Packing, failure, flow and permeability of assemblies of particles. Particle-particle interactions and suspension rheology. Handling and processing operations such as slurry flow, fluidization, pneumatic conveying. Interactions between particles and their environment, including delivery of particulate products to the body. Applications of particle technology in production of pharmaceuticals, chemicals, foods, pigments, structural, and functional materials and in environmental and energy related matters. For materials-oriented contributions we are looking for articles revealing the effect of particle/powder characteristics (size, morphology and composition, in that order) on material performance or functionality and, ideally, comparison to any industrial standard.