Effect of oxygen concentration on the minimum explosible concentration of aluminum powders

IF 4.5 2区工程技术 Q2 ENGINEERING, CHEMICAL

Powder Technology Pub Date : 2025-02-15 DOI:10.1016/j.powtec.2025.120794

Wookyung Kim , Yasuko Ueno , Rinrin Saeki , Tomoyuki Johzaki , Takuma Endo , Minhyeok Lee , Kwangseok Choi , Kazunori Kuwana

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Abstract

This study focuses on the explosion characteristics of aluminum (Al) powders, which have garnered significant attention as energy carriers due to their high energy density and reactivity. Specifically, it investigates the effect of oxygen concentration on the minimum explosible concentration (MEC). The experimental apparatus outlined in JIS Z8818 was modified to conduct experiments using O2-N2 mixtures. Various O2 concentrations ranging from 10 vol% to 50 vol% were tested to measure the MEC of Al powders. The results indicate that the MEC decreases with increasing O2 concentration, highlighting the critical role of O2 in the explosiveness of Al powders. Additionally, the validity of the theoretical model was verified by comparing the results of the continuum model calculations with the experimental data. This research provides a more accurate assessment of the explosion hazards of Al powders and offers foundational data for creating safer working environments. Furthermore, as a fundamental study, it contributes to the development of combustion systems for propulsion and energy applications, enhancing the understanding and design of efficient and safe energy systems.

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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.