The Effect of Treatment of Fusainized Coal with Gaseous Media on the Initial Stages of Oxidation in an Air Environment

IF 0.9 4区工程技术 Q4 CHEMISTRY, MULTIDISCIPLINARY

Solid Fuel Chemistry Pub Date : 2025-09-09 DOI:10.3103/S0361521925700302

S. A. Semenova, Yu. F. Patrakov, A. V. Yarkova, N. S. Zakharov, S. Yu. Lyrshchikov

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Abstract

The peculiarities of changes in the composition of SS grade coal prone to spontaneous combustion after its treatment in gas environments of various chemical activities (nitrogen, air, and carbon dioxide) were investigated. The effect of gases on changes in the chemical composition of the coal surface and the adsorption capacity to oxygen during low-temperature oxidation of coal in the air was established. The EPR-spectroscopic data indicated the recombination of free radicals at the initial stages of coal oxidation followed by an intensification of their formation when coal samples were exposed to air. An analysis of changes in the rate of oxygen absorption and the composition of the gas phase indicated the highest sorption activity to oxygen of a coal sample treated in an inert nitrogen environment. The crushing of coal in an atmosphere of air led to the primary oxidation of the native outer surface and a decrease in the sorption capacity to oxygen at the initial stage of its determination. The adsorption of carbon dioxide on an accessible coal surface was accompanied by a transformation of its functional composition and, thereby, a slowdown at the initial stages of oxidation.

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气体介质处理Fusainized煤对空气环境中氧化初始阶段的影响

研究了易自燃的SS级煤在不同化学活性气体环境（氮气、空气和二氧化碳）中处理后组成变化的特点。建立了煤在空气中低温氧化过程中，气体对煤表面化学成分变化和对氧吸附能力的影响。epr光谱数据表明，自由基在煤氧化的初始阶段发生重组，随后当煤样品暴露于空气中时，自由基的形成加剧。对吸氧速率和气相组成变化的分析表明，在惰性氮环境中处理的煤样对氧的吸附活性最高。煤在空气气氛中的破碎导致原生外表面的初级氧化，并且在测定其初始阶段对氧的吸附能力下降。二氧化碳在可接近的煤表面的吸附伴随着其功能成分的转变，从而在氧化的初始阶段减缓。

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来源期刊

Solid Fuel Chemistry CHEMISTRY, MULTIDISCIPLINARY-ENERGY & FUELS

CiteScore

1.10

自引率

28.60%

发文量

审稿时长

6-12 weeks

期刊介绍： The journal publishes theoretical and applied articles on the chemistry and physics of solid fuels and carbonaceous materials. It addresses the composition, structure, and properties of solid fuels. The aim of the published articles is to demonstrate how novel discoveries, developments, and theories may be used in improved analysis and design of new types of fuels, chemicals, and by-products. The journal is particularly concerned with technological aspects of various chemical conversion processes and includes papers related to geochemistry, petrology and systematization of fossil fuels, their beneficiation and preparation for processing, the processes themselves, and the ultimate recovery of the liquid or gaseous end products.