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The Repeatability of Sorption Processes Occurring in the Coal-Methane System during Multiple Measurement Series

Author

Listed:
  • Mateusz Kudasik

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

  • Norbert Skoczylas

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

  • Anna Pajdak

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

Abstract

The aim of this paper was to investigate the repeatability of sorption processes occurring in the coal-methane system during multiple measurement series. For research purposes, three granular samples of coal sorbent were used. The samples were subjected to a series of three measurements, each time performed under the same conditions. During each series of measurements, the following stages took place: outgassing the sample in a vacuum, and then saturating it with methane under the pressure of 1, 3, and 10 bar. Sorption capacities and the values of effective diffusion coefficients were compared. The studies into the repeatability of measurements of sorption capacities, conducted by means of the IGA-001 (Intelligent Gravimetric Analyzer) gravimetric instrument for three measurement cycles, showed that the obtained measurement discrepancies in relation to the mean value did not exceed 1.23%. The discrepancies in question approximated the measurement uncertainty of the IGA-001 device. The evaluation of the recurrence of determining the values of effective diffusion coefficients showed that the obtained discrepancies were no larger than 10%, which might have resulted from problems with fulfilling most of the assumptions of the applied unipore diffusion model. The authors did not observe any changes of the sorption parameters of hard coal during consecutive cycles of methane saturation.

Suggested Citation

  • 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.
    • Handle: RePEc:gam:jeners:v:10:y:2017:i:5:p:661-:d:98113
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    Citations

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    Cited by:

    1. 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.
    2. Sijian Zheng & Yanbin Yao & Shasha Zhang & Yong Liu & Jinhui Yang, 2019. "Insights into Multifractal Characterization of Coals by Mercury Intrusion Porosimetry," Energies, MDPI, vol. 12(24), pages 1-18, December.
    3. Norbert Skoczylas & Anna Pajdak & Mariusz Młynarczuk, 2019. "CO 2 Adsorption–Desorption Kinetics from the Plane Sheet of Hard Coal and Associated Shrinkage of the Material," Energies, MDPI, vol. 12(20), pages 1-20, October.
    4. Sijian Zheng & Shuxun Sang & Shiqi Liu & Xin Jin & Meng Wang & Shijian Lu & Guangjun Feng & Yi Yang & Jun Hou, 2022. "An NMR-Based Method for Multiphase Methane Characterization in Coals," Energies, MDPI, vol. 15(4), pages 1-15, February.
    5. Skoczylas Norbert & Anna Pajdak & Katarzyna Kozieł & Leticia Teixeira Palla Braga, 2019. "Methane Emission during Gas and Rock Outburst on the Basis of the Unipore Model," Energies, MDPI, vol. 12(10), pages 1-22, May.
    6. Paweł Baran & Katarzyna Czerw & Bogdan Samojeden & Natalia Czuma & Katarzyna Zarębska, 2018. "The Influence of Temperature on the Expansion of a Hard Coal-Gas System," Energies, MDPI, vol. 11(10), pages 1-10, October.

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