Articles

Impact of weak electromagnetic fields on the properties of coal substance

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Authors:


O.V.Burchak, orcid.org/0000-0001-9114-8585, Institute of Geotechnical Mechanics named by N.Poljakov of National Academy of Sciences of Ukraine, Dnipro, Ukraine, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

V.V.Sobolev, orcid.org/0000-0003-1351-6674, Dnipro University of Technology, Dnipro, Ukraine, email: This email address is being protected from spambots. You need JavaScript enabled to view it.

K.A.Bezruchko, orcid.org/0000-0002-3818-5624, Institute of Geotechnical Mechanics named by N.Poljakov of National Academy of Sciences of Ukraine, Dnipro, Ukraine, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

O.S.Kovrov, orcid.org/0000-0003-3364-119X, Dnipro University of Technology, Dnipro, Ukraine

A.V.Kurliak, orcid.org/0000-0002-9928-0406, Research-Industrial Complex Pavlohrad Chemical Plant, Pavlohrad, Dnipropetrovsk Region, Ukraine. e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

K.Jach, orcid.org/0000-0002-3924-5836, Institute of Optoelectronics of Military Academy of Technology, Warsaw, the Republic of Poland, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.


повний текст / full article



Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu. 2022, (5): 046 - 053

https://doi.org/10.33271/nvngu/2022-5/046



Abstract:



Purpose. To establish the regularities of the influence of magnetic fields on the peculiarities of changing the chemical and structural characteristics of the coal substance according to the size of microparticles enriched with vitrinite. To formulate a new system of views on the mechanisms of structural and functional transformations of coal substance under the influence of weak external fields.


Methodology. The authors used an electric furnace heating up to 320 K that creates a pulsation magnetic field with a strength of up to 4,000 A/m to process dispersed samples of hard coal with a weak magnetic field. The methods of infrared spectroscopy and electron paramagnetic resonance were used in the research.


Findings. Experimental works were carried out to estimate the impact of weak fields on the state and properties of coal substance. It is shown that weak energy fields, and the electromagnetic one in particular, are able to reduce the energy barriers of reactions in coal substance due to spin-spin interaction, which leads to the activation of processes at the atomic-molecular level and interfacial interaction.


Originality.It is experimentallyestablished that for coal micro-particles with sizes from 0.16 to 0.1 m, enriched with vitrinite, the coupling coefficient decreases after exposure to an external magnetic field, and for micro-particles with sizes less than 0.63 m, this indicator increases. Such changes are caused by the redistribution of hydrogen between aromatic and aliphatic components during free-radical reactions. Changes in the spectrum on vitrinite (0.160.10 mm), are more significant than on inertinite (0.063<0.05 mm). At the same time, the external action of the electromagnetic field has caused the opposite consequences. It is shownthat magnetically stimulated chemical reactions occurring in the coal substance are aimed at the recombination of free radicals with active surface states of the organic mass of coal into stable gas molecules. The results of laboratory studies using the methods of electron magnetic resonance and infrared spectroscopy and infrared spectroscopy allow assuming that the changes in structural characteristics recorded during experiments with low-energy impacts can be considered as intermediatorsfor the matter transformation or changes in the state of coal in preparation for structural and functional transformations.For example, to the sorption interaction or destructive processes with methane generation.


Practical values.The magnetic field effect can be used to develop new research methods for the study on elementary processes by electron spin resonance; control spin-dependent phase transitions. The use of magnetic resonance methods allows the usage of magnetically field effects in the form of basic tools for the research on structural defects. The results obtained will be a scientific ground for the development of methods for estimating the parameters of electromagnetic processes in coal to develop new technologies for the extraction and processing of hydrocarbon energy carriers.



Keywords: coal substance, electromagnetic fields, structural and functional transformations,spectrum, electronic paramagnetic resonance

References.


1. Daragan, T.V. (2022). On the role of electricity in the metamorphism of rocks. Modern challenges to science and practice. The International Scientific and Practical Conference, 196-200. Retrieved from https://openarchive.nure.ua/bitstream/document/19571/1/Afanasieva_Modern-challenges-to-science-and-practice_2022.pdf.

2. Sobolev, V.V., Molchanov, A.N., & Bilan, N.V. (2018). Electrically stimulated phase transformations in bituminous coals. In Topical issues of resource-saving technologies in mineral mining and processing. Multi-authored monograph. Petroani, Romania: Universitas Publishing, (pp. 186-211). Retrieved from http://ds.knu.edu.ua/jspui/bitstream/123456789/42/1/Topical%20issues%20of%20resource-saving%20technologies%20in%20mineral.pdf.

3. Panchenko, E.M. (2009). Electret state in oxides: monograph. Moscow: Fizmatlit.

4. Samoilyk, V.H. (2016). Classification of solid fossil fuels and methods of their research: monograph. Kharkiv: Vodnyi spektr G-M-P.

5. Bulat, ., Bogdanov, V., Trachevsky, V., Burchak, ., & Serikov,Yu. (2021). Research of mechanisms and driving forces of the self-organization of the matrices of natural solid hydrocarbons. Reports of the National Academy of Sciences of Ukraine, (3), 26-32. https://doi.org/10.15407/dopovidi2021.03.026.

6. Ulianova, E.V., Molchanov, A.N., & Burchak, A.V. (2013). Influence of microstructure of coal matter on methane content. Fizyko-tekhnichni problemy hirnychoho vyrobnytstva, 16, 50-57.

7. Alekseev, A.D. (2010). Physics of coal and mining processes: monograph. Kyiv: Naukova dumka.

8. Burchak, O.V., Primin, M.A., Nedaivoda, I.V., & Serikova, Yu.A. (2016). The influence of external factors on the state of the coal substance. Geo-technical mechanics, 124, 97-105.

9. Zhu, W., Perebeinos, V., Freitag, M., & Avouris, P. (2009). Carrier scattering, mobilities, and electrostatic potential in monolayer, bilayer, and trilayer graphene. Physical Review B, 80, 233102 (2009).

10. Mikhailovskij, I.M., Sadanov, E.V., Mazilova, T.I., Ksenofontov,V.A., & Velicodnaja, O.A. (2009). Imaging the atomic orbitals of carbon atomic chains with field-emission electron microscopy. Physical Review B, 80, 165404. https://doi.org/10.1103/PhysRevB.

11. Mazilova, T.I., Kotrechko, S., Sadanov, E.V., Ksenofontov, V.A., & Mikhailovskij, I. M. . (2010). High-field formation of linear carbon chains and atomic clusters. International Journal of Nanoscience, 9(3), 151-157. https://doi.org/10.1142/s0219581x10006636.

12. Wang, Y., Lin, Z.-Z., Zhang, W., Jun Zhuang, J., & Ning, X.-J. (2009). Pulling long linear atomic chains from graphene: Molecular dynamics simulations. Physical Review B,80, 233403.

https://doi.org/10.1103/PhysRevB.80.233403.

13. Soboliev, V., Bilan, N., Filippov, A., & Baskevich, A. (2011). Electric stimulation of chemical reactions in coal. Technical and Geoinformational systems in Mining, 125-130. https://doi.org/10.1201/b11586-11.

14. Sheka,E.F., Popova,N.A., & Popova,V.A. (2018). Physics and chemistry of graphene. Emergentness, magnetism, mechanophysics and mechanochemistry. Physics-Uspekhi, 61, 645-691. https://doi.org/10.3367/UFNe.2017.11.038233.

15. Ulianova, E.V. (2012). Structural and compositional rearrangements in fossil coals. Relationship between microstructure and kinetics of mining processes: monograph. Saarbrcken: Palmarium Academic Publishing.

16. Alekseev, A.D., Ulianova, E.V., Vasilkovskii, V.A., Razumov,O.N., Zimina, S.V., & Skoblik, A.P. (2010). Peculiarities of the structure of coal in outburst hazardous areas. Mining Information and analytical bulletin, (8), 164-179.

17. Smirnov, V.G., Dyrdin, V.V., Ismagilov, Z.R., Kim, T.L., & Manakov, A.Yu. (2017). On the influence of the forms of methane bonding with the coal matrix on gas-dynamic phenomena occuring during underground mining of coal seams. Scientific and technical journal Vestnik, (1), 34-39.

18. Tiwari, J.N., Tiwari, R.N., & Kim, K.S. (2012). Zero-dimensional, one-dimensional, twodimensional and three-dimensional nanostructured materials for advanced electrochemical energy devices. Progress in Materials Science, 57(4), 724-803. https://doi.org/10.1016/j.pmatsci.2011.08.003.

19. Khan, I., Saeed, K., & Khan, I. (2019). Nanoparticles: Properties, applications and toxicities. Arabian Journal of Chemistry, 12(7), 908-931. https://doi.org/10.1016/j.arabjc.2017.05.011.

20. Kobzev, A.P. (2014). On the radiation mechanism of a uniformly moving charge. Physics of elementary particles and the atomic nucleus, 45(3), 1110-1163.

21. Pivnyak, G.G., Sobolev, V.V., & Filippov, A.O. (2012). Phase transformations in bituminous coals under the influence of weak electric and magnetic fields. Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu, (5), 43-49.

22. Soboliev, V., Bilan, N., & Samovik, D.(2013). Magnetic stimulation of transformations in coal. In Mining of Mineral Deposits, (pp.221-225). Leiden: CRC Press/Balkema. https://doi.org/10.201/b16354-2.

23. Zavilopulo, A.N., Mikita, M.I., & Shpenik, O.B. (2012). Mass spectroscopic study into coal gases from samples of low and high degrees of coalification. Zhurnal Tekhnicheskoi Fiziki, 82(7), 30-37.

24. Takacs, L. (2013). The historical development of mechanochemistry. Chemical Society Reviews, 42(18), 7649-7659. https://doi.org/10.1039/c2cs35442j.

25. Bereza, O.Yu., Filonenko, N.Yu., & Baskevych, O.S. (2012). Calculation of the energy of chemical bond of boron-containing phases in FeBC system alloys. Research Bulletin of NTUU KPI. Theoretical and applied problems of Physics, (4), 116-120.

26. Kolesnichenko, I.E., Artemiev, V.B., Kolesnichenko, E.A., & Liubomishchenko, E.I. (2019). Explosions and emissions of methane: quantum theory of methane content, outburst hazard and degassing of coal seams. Mining, (4), 138-143. https://doi.org/10.30686/1609-9192-2019-4-138-143.

 

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