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Synergy of Parameters Determining the Optimal Properties of Coal as a Natural Sorbent

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  • Katarzyna Godyń

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

  • Barbara Dutka

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

  • Monika Chuchro

    (Faculty of Geology, Geophysics and Environmental Protection, AGH University of Science and Technology; al. Mickiewicza 30, 30-059 Kraków, Poland)

  • Mariusz Młynarczuk

    (Faculty of Geology, Geophysics and Environmental Protection, AGH University of Science and Technology; al. Mickiewicza 30, 30-059 Kraków, Poland)

Abstract

Selection of the optimal properties of coal as a natural sorbent, both as a sample collected from a seam or of the coal seam itself, requires various parameters to be determined and may not be based on the knowledge of metamorphism degree only. In order to improve the predictions of sorption capacity and the kinetics, analyses of correlation and multiple regression based on the results of laboratory studies were performed for 15 coal samples with various coal rank. The maximum vitrinite reflectance ( R 0 ) for low-rank coals was 0.78%–0.85%, and 0.98%–1.15% and 1.85%–2.03% for medium- and high-rank coals, respectively. Coal samples were subjected to technical and petrographic analysis. The gravimetric method was used to perform sorption tests using methane, in order to determine the sorption capacity and the effective diffusion coefficient for each of the coals. Pycnometric methods were used to determine the textural parameters of coals, such as the percentage porosity and specific pore volume. The studies were further supplemented with an evaluation of the mechanical properties of the coals, Vickers micro-hardness, and elastic modulus. This work shows that the statistical multiple regression method enables a computational model including the selected petrophysical parameters displaying synergy with the specific sorption property—capacity or kinetics—to be created. The results showed the usefulness of this analysis in providing improved predictions of the optimal sorption properties of coal as a natural sorbent.

Suggested Citation

  • Katarzyna Godyń & Barbara Dutka & Monika Chuchro & Mariusz Młynarczuk, 2020. "Synergy of Parameters Determining the Optimal Properties of Coal as a Natural Sorbent," Energies, MDPI, vol. 13(8), pages 1-17, April.
  • Handle: RePEc:gam:jeners:v:13:y:2020:i:8:p:1967-:d:346253
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    References listed on IDEAS

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    1. Mateusz Kudasik & Norbert Skoczylas & Anna Pajdak, 2017. "The Repeatability of Sorption Processes Occurring in the Coal-Methane System during Multiple Measurement Series," Energies, MDPI, vol. 10(5), pages 1-15, May.
    2. Yingjin Wang & Dameng Liu & Yidong Cai & Xiawei Li, 2019. "Variation of Petrophysical Properties and Adsorption Capacity in Different Rank Coals: An Experimental Study of Coals from the Junggar, Ordos and Qinshui Basins in China," Energies, MDPI, vol. 12(6), pages 1-19, March.
    3. Katarzyna Godyń & Alena Kožušníková, 2019. "Microhardness of Coal from Near-Fault Zones in Coal Seams Threatened with Gas-Geodynamic Phenomena, Upper Silesian Coal Basin, Poland," Energies, MDPI, vol. 12(9), pages 1-15, May.
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    Cited by:

    1. Zhihui Liu & Yongfei Yang & Yingwen Li & Jiaxue Li, 2021. "In Situ Deformation Analysis of a Fracture in Coal under Cyclic Loading and Unloading," Energies, MDPI, vol. 14(20), pages 1-16, October.
    2. Marta Skiba & Barbara Dutka & Mariusz Młynarczuk, 2021. "MLP-Based Model for Estimation of Methane Seam Pressure," Energies, MDPI, vol. 14(22), pages 1-12, November.
    3. Anmin Wang & Daiyong Cao & Yingchun Wei & Zhifei Liu, 2020. "Macromolecular Structure Controlling Micro Mechanical Properties of Vitrinite and Inertinite in Tectonically Deformed Coals—A Case Study in Fengfeng Coal Mine of Taihangshan Fault Zone (North China)," Energies, MDPI, vol. 13(24), pages 1-23, December.
    4. Katarzyna Godyń & Barbara Dutka, 2022. "Preliminary Studies of Slag and Ash from Incinerated Municipal Waste for Prospective Applications," Energies, MDPI, vol. 16(1), pages 1-26, December.

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