Effect of the Chemical Composition of Coals on Surface Wettability and Filtration Properties

Yu. F. Patrakov; Патраков Ю. Ф.; S. A. Semenova; Семенова С. А.; A. V. Yarkova; Яркова А. В.

doi:10.31857/S0023117723040096

Effect of the Chemical Composition of Coals on Surface Wettability and Filtration Properties

Authors: Patrakov Y.F.¹, Semenova S.A.¹, Yarkova A.V.¹
Affiliations:
1. Coal Institute, Federal Research Center of Coal and Coal Chemistry, Siberian Branch, Russian Academy of Sciences
Issue: No 4 (2023)
Pages: 16-22
Section: Articles
URL: https://rjmseer.com/0023-1177/article/view/661824
DOI: https://doi.org/10.31857/S0023117723040096
EDN: https://elibrary.ru/OMVYYI
ID: 661824

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Abstract

The method of liquid filtration through a layer of coal powder was used for a comprehensive characterization of surface wettability in conjunction with the determination of the contact angle. The effect of the degree of chemical maturity (metamorphism) of coal on the filtration characteristics of a layer with fractured porous properties was evaluated. Different activity of coal surfaces to water wettability upon a change from the native state to the surface-oxidized one was established. It was shown that the wetting and filtration properties of the coal surfaces increased from native to surface-oxidized coals and decreased as the degree of metamorphism increased from low to medium metamorphosed coals.

Keywords

hard coal, laboratory sample preparation, oxidation, wettability, filtration

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