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Changes in the Structural Characteristics and Composition of Oxidized Coal Because of Mechanochemical Action

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Abstract

An increase in the concentration of acidic surface groups, the sorption exchange capacity of oxidized coal, and the yield of humic acids by 20–40% due to mechanical action with alkaline and oxidizing alkaline reagents was found. According to the IR-spectroscopic data of coals and the potentiometric titration of acidic groups, a decrease in the concentration of carboxyl groups in aliphatic fragments due to their maximum sorption capacity for metal ions was noted. Humic acids were characterized by a significant increase in the number of oxygen-containing groups and stable polyconjugated heteroaromatic fragments as a result of mechanochemical action.

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Funding

This study was funded by the Ministry of Science and Higher Education of the Russian Federation (NIOKTR 121031500049-8) and carried out within the framework of a state contract at the Institute of Petroleum Chemistry, Siberian Branch, Russian Academy of Sciences.

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Authors and Affiliations

  1. Institute of Petroleum Chemistry, Siberian Branch, Russian Academy of Sciences, 634055, Tomsk, Russia

    E. V. Linkevich, N. V. Yudina, A. V. Savel’eva & E. M. Berezina

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  1. E. V. Linkevich
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  2. N. V. Yudina
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  3. A. V. Savel’eva
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  4. E. M. Berezina
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Corresponding authors

Correspondence to E. V. Linkevich, N. V. Yudina, A. V. Savel’eva or E. M. Berezina.

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The authors declare that they have no conflicts of interest.

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Translated by V. Makhlyarchuk

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Linkevich, E.V., Yudina, N.V., Savel’eva, A.V. et al. Changes in the Structural Characteristics and Composition of Oxidized Coal Because of Mechanochemical Action. Solid Fuel Chem. 56, 145–151 (2022). https://doi.org/10.3103/S0361521922020045

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  • DOI: https://doi.org/10.3103/S0361521922020045

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