Articles

Nanostructures of coal beds in the Sherubaynurinsky section of the Karaganda basin

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Authors:


L.F.Mullagaliyeva, orcid.org/0000-0003-1168-4076, Karaganda Technical University, Karaganda, the Republic of Kazakhstan, -mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

S.K.Baimukhametov, orcid.org/0000-0002-7130-5560, Karaganda Technical University, Karaganda, the Republic of Kazakhstan, -mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

V.S.Portnov, orcid.org/0000-0002-4940-3156, Karaganda Technical University, Karaganda, the Republic of Kazakhstan, -mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

V.M.Yurov, orcid.org/0000-0002-7918-9656, Karaganda Technical University, Karaganda, the Republic of Kazakhstan, -mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

D.A.Ibragimova, orcid.org/0000-0002-2588-3028, JSC Shubarkol Komir, Karaganda, the Republic of Kazakhstan


повний текст / full article



Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu. 2022, (4): 017 - 022

https://doi.org/10.33271/nvngu/2022-4/017



Abstract:



Purpose.
To determine the thickness of thin films of coal matter in the Sherubaynurinsky area of the Karaganda basin and their effect on the physical properties of these films.


Methodology.
In order to calculate the thickness of the surface layer of the coal substance using our proposed formula, one needs to know the molar mass and density. We will use the well-known work where it is shown that such a characteristic as the molecular weight of coal reflects rather well the degree of metamorphism, and is also decisive for the study on the composition and structure of coal raw materials.


Findings.
The role of the thickness of the surface layer of coal in the course of most physical processes is shown. A thin layer of coal matter differs significantly from metals and other compounds. But it is close to the structure of higher fullerenes. One fundamental parameter, the atomic volume of the surface layer, determines all the properties of the nanostructure of this layer.


Originality.
For the first time, the thickness of the surface layer of the coal substance has been determined, which is two orders of magnitude greater than the thickness of pure metals. The thickness of the surface layer of higher fullerenes C96 (135 nm) is close to that for OC coal (146 nm). The average statistical structural unit of coal corresponds to higher fullerenes with the number of carbon atoms in the cluster >100, which is a unique feature of coal matter. The thickness of the surface layer of coal in the Sherubaynurinsky area of the Karaganda basin with a size of ~150200 nm was obtained. This structure is a nanostructure. In this layer, the physicochemical properties of nanomaterials occur: a change in the crystalline (supramolecular) structure of coal; a change in its electronic structure and its electrical conductivity; change in the conditions of the stress state of coal; change in the conditions of methane diffusion in coal seams and many other phenomena.


Practical value.
The natural gas content C0 depends linearly on the reciprocal of d(I). For coal seam k, where d(I) = 180.8 nm, it was obtained 0 = 19 m3/t. After the release of coal and gas, the average value of C0 = 216 m3/t at a seam depth of 430 m, and in the Sherubaynurinsky area C0 = 14 m3/t at an average thickness of the surface layer d(I) = 170 nm. Hence, after the explosion d(I)v = 35 nm, i.e. the layer thickness decreases by almost 5 times, leading to the formation of coal dust. We have considered only a part of the nanostructure issues: porosity and gas content, explosiveness and moisture content of coal seams, and have shown that all physical phenomena in a thin layer of coal have a dimensional dependence and determine structures unexplored until now, and phenomena studies on which are necessary for the practice of mining.



Keywords:
Karaganda basin, nanostructure, surface layer thickness, coal, molar mass, density, size effect, carbon, fullerene

References.


1. Mamonova, M.V., Prudnikov, V.V., & Prudnikova, I.A. (2016). Surface Physics: Theoretical Models and Experimenal Methods. CRC Press. ISBN: 9780367379377.

2. Yurov, V.M., Guchenko, S.A., & Laurinas, V.Ch. (2018). Surface layer thickness, surface energy, and atomic volume of an element. Physicochemical aspects of studying clusters, nanostructures and nanomaterials, 10, 691-699. https://doi.org/10.26456/pcascnn/2018.10.69.

3. Yurov, V.M., Makhanov, K.M., & Portnov, V.S. (2020). Nanostructures in a thin layer of coal substance. Physicochemical aspects of studying clusters, nanostructures and nanomaterials, (12), 746-757. https://doi.org/10.26456/pcascnn/2020.12.746.

4. Portnov, V., Yurov, V., Reva, M., Mausymbaeva, A., & Imanbaeva,S. (2021). Nanostructures in surface layers of coal matter. Visnyk of Taras Shevchenko National University of Kyiv. Geology, 4(95), 54-62. https://doi.org/10.17721/1728-2713.95.07.

5. Sun, Y., Yuan, L., & Zhao, Y. (2018). CO2-ECBM in coal nanostructure: Modelling and simulation. Journal of Natural Gas Science & Engineering, 54, 202-215. https://doi.org/10.1016/j.jngse.2018.04.007.

6. Jia, T., Liu, C., Wei, G., Yan, J., Zhang, Q., Niu, L., , & Zhang,Y. (2021). Micro-Nanostructure of Coal and Adsorption-Diffusion Characteristics of Methane. Journal of Nanoscience and Nanotechnology, 21(1), 422-430. https://doi.org/10.1166/jnn.2021.18733.

7. Ding, J., Chen, S.-M., & Jisheng, P. (2019). Rapid Pyrolysis of Pulverized Coal for the Preparation of Nanostructured Powder Activated Coke. Materials Science Forum, 962, 63-69. https://doi.org/10.4028/WWW.SCIENTIFIC.NET/MSF.962.63.

8. Hashemipour, H., Danafar, F., & Rad, S.A. (2020). Direct and one-stage conversion of coal into carbon nanostructures with spherical, rod, tube and plate geometry by chemical solid synthesis method. Journal of Applied Chemistry, 15(56), 179-194. https://doi.org/10.22075/CHEM.2020.17820.1639.

9. Reddy, B.R., Ashok, I., & Vinu, R. (2020). Preparation of carbon nanostructures from medium and high ash Indian coals via microwave-assisted pyrolysis. Advanced Powder Technology, 31(3), 1229-1240. https://doi.org/10.1016/i.apt.2019.12.017.

10. Fathabadi, M.V., Rafsanjani, H.H., & Danafar, F. (2018). Experimental Study on Catalytic Effect of Iron Compounds During Synthesis of Carbon Nanostructures from Coal. Iranian Journal of Analytical Chemistry, 5(1), 39-43.

11. Moskalenko, T.V., Mikheev, V.A., & Vorsina, E.V. (2018). Mathematical model for calculating the molecular weight of coal. Modern high technologies, (10), 82-85.

12. Maussymbayeva, A.D. (2018). Distribution of iron-containing minerals in the coal and rocks of Shubarkol deposit. XIX Ural Youth Scientific School in Geophysics, (pp.112-114). Yekaterinburg: IGP UB RAN.

13. Zeinullin, A.A., Khasen, B.P., Ozhogin, T.V., Krysin, A.V., & Lis,S.N. (2016). Key parameters of coals of the Karaganda basin for the production of coal-bed methane. Geology and mineral resources protection, 2(59), 12-23

14. Korotcenkov, G. (2015). Porous Silicon: From Formation to Application: Formation and Properties, (Vol. 1). CRC Press. https://doi.org/10.1201/b19342. ISBN 9781482264548.

15. Drizhd, N.A., Kamarov, R.K., Akhmatnurov, D.R., Zamaliyev,N.M., & Shmidt-Fedotova, I.M. (2017). Coal bed methane Ka­ra­gan­da basin in the gas balance Republic of Kazakhstan: status and prospects. Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu, (1), 12-20.

16. Kalyakin, S.A. (2013). Fire and explosion hazard of coal and dust and gas mixtures in mines. Visti of Donetsk State University, 1(32), 127-144.

 

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ISSN (print) 2071-2227,
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