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Analysis of the Influence of Coal Petrography on the Proper Application of the Unipore and Bidisperse Models of Methane Diffusion

Author

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  • Marcin Karbownik

    (Department of Mining Aerology, Central Mining Institute, Plac Gwarków 1, 40-166 Katowice, Poland)

  • Jerzy Krawczyk

    (The Strata Mechanics Research Institute of Polish Academy of Sciences, Reymonta 27, 30-059 Krakow, Poland)

  • Katarzyna Godyń

    (The Strata Mechanics Research Institute of Polish Academy of Sciences, Reymonta 27, 30-059 Krakow, Poland)

  • Tomasz Schlieter

    (Department of Computational Mechanics and Engineering, Silesian University of Technology, Konarskiego 18A, 44-100 Gliwice, Poland)

  • Jiří Ščučka

    (Institute of Geonics of the CAS, Studentská 1768, 708 00 Ostrava, Czech Republic)

Abstract

The analysis of phenomena related to gas transport in hard coal is important with regard to the energetic use of coal bed methane (CBM), the reduction of greenhouse gas emissions to the atmosphere (CO 2 ) and the prevention of natural hazards such as methane hazards and gas and rock outbursts. This article presents issues concerning the feasibility and scope of applying the unipore and bidisperse diffusion models to obtain knowledge concerning the kinetics of methane sorption and its diffusion in the carbon structure, depending on its petrography. Laboratory tests were carried out on coal samples which varied in terms of petrography. Quantitative point analyses were carried out, based on which content of groups of macerals was determined. The degree of coalification of coal samples was also determined based on measurements of vitrinite reflectivity R 0 and the volatile matter content V daf . Sorption kinetics were also investigated, and attempts were made to adjust the unipore and bidisperse models to the real sorption kinetic courses. This allowed the identification of appropriate coefficients controlling the course of sorption in mathematical models. An attempt was also made to assess the possibility of applying a given model to properly describe the phenomenon of methane sorption on hard coal.

Suggested Citation

  • Marcin Karbownik & Jerzy Krawczyk & Katarzyna Godyń & Tomasz Schlieter & Jiří Ščučka, 2021. "Analysis of the Influence of Coal Petrography on the Proper Application of the Unipore and Bidisperse Models of Methane Diffusion," Energies, MDPI, vol. 14(24), pages 1-20, December.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:24:p:8495-:d:704058
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    References listed on IDEAS

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    1. Marek Borowski & Piotr Życzkowski & Jianwei Cheng & Rafał Łuczak & Klaudia Zwolińska, 2020. "The Combustion of Methane from Hard Coal Seams in Gas Engines as a Technology Leading to Reducing Greenhouse Gas Emissions—Electricity Prediction Using ANN," Energies, MDPI, vol. 13(17), pages 1-18, August.
    2. Magdalena Tutak & Jarosław Brodny, 2019. "Forecasting Methane Emissions from Hard Coal Mines Including the Methane Drainage Process," Energies, MDPI, vol. 12(20), pages 1-28, October.
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    Cited by:

    1. Marcin Karbownik & Agnieszka Dudzińska & Jarosław Strzymczok, 2022. "Multi-Parameter Analysis of Gas Losses Occurring during the Determination of Methane-Bearing Capacity in Hard Coal Beds," Energies, MDPI, vol. 15(9), pages 1-17, April.
    2. Wang, Kai & Wang, Yanhai & Xu, Chao & Guo, Haijun & Xu, Zhiyuan & Liu, Yifu & Dong, Huzi & Ju, Yang, 2023. "Modeling of multi-field gas desorption-diffusion in coal: A new insight into the bidisperse model," Energy, Elsevier, vol. 267(C).

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