Advertisement

Solid Fuel Chemistry

, Volume 52, Issue 6, pp 361–369 | Cite as

An NMR Study of the Ratio between Free and Sorbed Methane in the Pores of Fossil Coals

  • T. A. VasilenkoEmail author
  • A. K. KirillovEmail author
  • A. N. Molchanov
  • E. A. Pronskii
Article
  • 12 Downloads

Abstract

Theoretical and experimental data on the concentrations of methane in different phase states in the porous structure of coals from the Donets Basin are reported. On the saturation of coal samples with methane, the natural conditions of the occurrence of methane in coal beds were simulated for the equilibrium coal–gas system. The amounts of methane dissolved in a solid matrix and adsorbed on the pore surfaces of coal matter were measured by broad-band NMR spectroscopy. The values obtained did not exceed 20% of the total methane absorbed by the sample in an equilibrium state at a pressure of 10 MPa. Sorbed methane was the predominant phase state only upon the opening of a high-pressure chamber after the emission of methane from filtration channels.

Keywords:

coal methane mass transfer sorption porosity pressure 

Notes

REFERENCES

  1. 1.
    Alekseev, A.D. and Sinolitskii, V.V., Fiz. Tekhn. Vys. Davl., 1982, vol. 12, p. 103.Google Scholar
  2. 2.
    Cheremskoi, P.G., Slezov, V.V., and Betekhtin, V.I., Pory v tverdom tele (Pores in a Solid), Moscow: Energoatomizdat, 1990.Google Scholar
  3. 3.
    Glikman, E.E. and Bruver, R.E., Fizicheskaya khimiya poverkhnostnykh yavlenii pri vysokikh temperaturakh (Physical Chemistry of Surface Phenomena at High Temperatures), Kiev: Naukova Dumka, 1971, p. 251.Google Scholar
  4. 4.
    Airuni, A.T., Prognozirovanie i predotvrashchenie gazodinamicheskikh yavlenii v ugol’nykh shakhtakh (Forecasting and Prevention of Gas-Dynamic Phenomena in Coal Mines), Moscow: Nauka, 1978.Google Scholar
  5. 5.
    Alekseev, A.D., Fel’dman, E.P., Vasilenko, T.A., Molchanov, A.N., and Kalugina, N.A., Fiz. Tekhn. Vys. Davl., 2004, vol. 14, no. 3, p. 107.Google Scholar
  6. 6.
    Milewska-Duda, J., Duda, J., Nodzenski, A., and Lakatos, J., Langmuir, 2000, vol. 16, no. 12, p. 5458.CrossRefGoogle Scholar
  7. 7.
    Weishauptova, Z., Medek, J., and Kovar, L., Fuel, 2004, vol. 83, no. 13, p. 1759.CrossRefGoogle Scholar
  8. 8.
    Fel’dman, E.P., Vasilenko, T.A., and Kalugina, N.A., J. Mining Sci., 2014, vol. 50, no. 3, p. 448.CrossRefGoogle Scholar
  9. 9.
    Gregg, S. and Sink, K., Adsorption, Surface Area and Porosity, New York: Academic, 1982.Google Scholar
  10. 10.
    Lang, K., Astrophysical Formulae: A Compendium for the Physicist and Astrophysicist, Heidelberg: Springer, 1974.CrossRefGoogle Scholar
  11. 11.
    Vasilenko, T.A., Kirillov, A.K., and Molchanov, A.N., Izv. Donetskogo gornogo in–ta (Proceedings of the Donetsk Mining Institute), Donetsk: DonNTU, 2012, p. 36.Google Scholar
  12. 12.
    Alekseev, A.D., Ul’yanova, E.V., and Vasilenko, T.A., Phys. Usp., 2005, vol. 48, p. 1161.CrossRefGoogle Scholar
  13. 13.
    Alekseev, A.D., Zavrazhin, V.V., Melyakov, A.D., and Troitskii, G.A., Fiz. Tekhn. Vys. Davl., 2002, vol. 12, no. 1, p. 71.Google Scholar
  14. 14.
    Alekseev, A.D., Vasilenko, T.A., Kirillov, A.K., Molchanov, A.N., Troitskii, G.A., Vishnyakov, A.V., and Pichka, T.V., Fiz. Tekhn. Vys. Davl., 2011, vol. 21, no. 3, p. 126.Google Scholar
  15. 15.
    Molchanov, A.N., Fizi.-Tekhn. Probl. Gorn. Proizv., 2011, no. 14, p. 42.Google Scholar
  16. 16.
    Vashman, A.A. and Pronin, I.S., Yadernaya magnitnaya relaksatsionnaya spektroskopiya (Nuclear Magnetic Relaxation Spectroscopy), Moscow: Energoatomizdat, 1986.Google Scholar
  17. 17.
    Jonson, Jr.C.S. and Waugh, J.S., J. Chem. Phys., 1961, vol. 35, no. 6, p. 2020.CrossRefGoogle Scholar
  18. 18.
    Bloembergen, N., Purcell, E.M., and Pound, R.V., Phys. Rev., 1948, vol. 73, no. 7, p. 679.CrossRefGoogle Scholar
  19. 19.
    Valiullin, R., Kortunov, P., Karger, J., and Timoshenko, V., J. Chem. Phys., 2004, vol. 120, no. 24, p. 11804.CrossRefGoogle Scholar

Copyright information

© Allerton Press, Inc. 2018

Authors and Affiliations

  1. 1.St. Petersburg Mining UniversitySt. PetersburgRussia
  2. 2.Institute for Physics of Mining Processes, National Academy of Sciences of UkraineDniproUkraine

Personalised recommendations