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ArticleName Methods of coal oxidation estimation
DOI 10.17580/gzh.2015.05.06
ArticleAuthor Novikov E. A., Dobryakova N. N., Shkuratnik V. L., Epshtein S. A.

Author 1:
Name & Surname: Novikov E. A.
Company: Mining Institute of National University of Science and Technology MISiS (Moscow, Russia)
Work Position: Researcher
Scientific Degree: Candidate of Technical Science

Author 2:
Name & Surname: Dobryakova N. N.
Company: Mining Institute of National University of Science and Technology MISiS (Moscow, Russia)
Work Position: Postgraduate student

Author 3:
Name & Surname: Shkuratnik V. L.
Company: Mining Institute of National University of Science and Technology MISiS (Moscow, Russia)
Work Position: Head of Department of Physico-Technical Control in Mining
Scientific Degree: Professor, Doctor of Technical Science
Contacts: e-mail:

Author 4:
Name & Surname: Epshtein S. A.
Company: Mining Institute of National University of Science and Technology MISiS (Moscow, Russia)
Work Position: Head of Coal Physics and Chemistry Laboratory
Scientific Degree: Professor, Doctor of Technical Science


The article gives an analytical review of the existing methods for assessment of coal oxidation as one of the most important characteristics and a criterion of coal quality. The consideration involves basic standards in use in Russia and abroad for regulation of coal oxidation assessment based on microscopy of polished sectionsbriquettes and optical density of alkaline extracts of coal. Shortcomings of the standards and their common use ranges are described. The authors analyze the existing alternative techniques of coal oxidation assessment based on: generation of humic acids under oxidation decomposition of coal, alterations in thermal decomposition of coal, its sorption properties, conductance, phase composition of iron compounds, etc. Attention is given to methods that use interaction between oxidation level and process variables of coal, such as combustion heat, coking capacity, water content, mass, etc. The article describes the method based on analyzing parameters of heat-stimulated acoustic emission of coal, heat endurance of which is the function of oxidation. It is noticed that none of the discussed methods is universal and enables investigation of oxidation of coal of various types and kinds, or at various levels of oxidation. Low precision of oxidation estimates obtained with different methods is highlighted. It is shown that the efficient assessment of coal oxidation is possible through integration of different methods in order to take into account genesis and metamorphism of coal; chemical activity of coal toward oxidizing agents; endogenous and exogenous damage that conditions access of oxidizing agents to free surface of coal, air permeability and diffusion coefficients; efficient kinetic parameters that characterize intensity of exothermal processes resulting in heating of coal.
The work was supported by the Federal Target Program “Research and Development in Priority Areas of Scientific and Technical Advance in Russia in 2014–2020,” (Agreement No. 14.575.21.0062, unique agreement identification RFMEFI57514X0062).

keywords Coal oxidation, assessment, methods, research directions, integration, classification criteria

1. GOST 8930-94. Ugli kamennye. Metod opredeleniya okislennosti (State Standard 8930-94. Hard coals. Method for determination of oxidation). Moscow : Publishing House of Standards, 1995. 15 p. (in Russian)
2. GOST 9414.2-93. Ugol kamennyy i antratsit. Metody petrograficheskogo analiza. Chast 2. Metod podgotovki obraztsov uglya (State Standard 9414.2-93. Methods for the petrographic analysis of bituminous coal and anthracite. Part 2. Method of preparing coal samples). Moscow : Publishing House of Standards, 1995. 18 p. (in Russian)
3. GOST 32356-2013. Ugli kamennye i antratsity okislennye Kuznetskogo i Gorlovskogo basseynov. Klassifikatsiya (State Standard 32356-2013. Oxidized pit and anthracites of Kuznets and Gorlovsky basins. Classification). Moscow : Standartinform, 2015. (in Russian)
4. GOST 2111-75. Ugli Kuznetskogo basseyna dlya koksovaniya. Metod ustanovleniya granitsy zony okislennykh ugley (State Standard 2111-75. Kuznetsk Basin coals for coking. Method for determination of oxidized coals zone border). Moscow : Publishing House of Standards, 1975. 6 p. (in Russian)
5. ASTMD:5263-93(2008) Standard Test Method for Determining the Relative Degree of Oxidation in Bituminous Coal by Alkali Extraction. West Conshohocken : ASTM International, 2008.
6. Yun Y., Meuzelaar H. L. C. Development of a reliable coal oxidation (weathering) index – Slurry pH and its applications. Fuel Processing Technology. 1991. Vol. 27. pp. 179–202.
7. Lowenhaupt D. E., Gray R. J. The alkali- extraction test as a reliable method of detecting oxidised metallurgical coal. International Journal of Coal Geology. 1980. Vol. 1. pp. 63–73.
8. Ingram G. R., Rimstidt J. D. Natural weathering of coal. Fuel. 1984. Vol. 63. pp. 292–296.
9. Kleshnya G. G., Lavrova O. Yu., Revenko N. M., Drozdnik I. D., Miroshnichenko D. V., Desna N. A., Ivanova E. V. Ispolzovanie metoda opredeleniya okislennosti ugley v Avdeevskom koksokhimicheskom zavode (Use of method of definition of coal oxidation degree in Avdiivka Coke and Chemical Plant). Koks i khimiya = Coke and chemistry. 2013. No. 11. pp. 17–23.
10. Veselovskiy V. S., Alekseeva N. D., Vinogradova L. P., Orleanskaya G. L., Terpogosova E. A. Samovozgoranie promyshlennykh materialov (Spontaneous ignition of industrial materials). Moscow : Nauka, 1964. 246 p.
11. Veselovskiy V. S. Fizicheskie osnovy samovozgoraniya uglya i rud (Physical basis of spontaneous ignition of coal and ores). Moscow : Nauka, 1972. 122 p.
12. G. N. Podbelskiy. Sposob sravnitelnogo opredeleniya stepeni okislennosti kamennykh ugley (Method of comparitive definition of coal oxidation degree). Certificate of Authority No. 69518, IPC7, G01N5, G01N31. Applied: July 30, 1946. Published: October 31, 1947.
13. Kucher R. V., Sergatyuk A. F. Sposob kontrolya okisleniya kamennykh ugley (Method of control of coal oxidation). Certicficate of Authority No. 1325343, IPC7, G01N27/02. Applied: May 15, 1985. Published: July 23, 1987. Bulletin No. 27.
14. Shlezinger M. A. Lyuminestsentnyy analiz (Luminescence analysis). Moscow : Fiziko-Matematicheskaya literatura, 1961. 401 p.
15. Musa Sarikayaa, Gülhan Özbayoğlu. Flotation characteristics of oxidized coal. Fuel. 1995. Iss. 2, Vol. 74. pp. 291–294.
16. Fuerstenau D. W., Diao J. Characterization of coal oxidation and coal wetting behaviour by film flotation. Coal Preparation. 1992. Vol. 10. pp. 1–17.
17. Vyalov V. I., Gamov M. I., Epshteyn S. A. Izuchenie okislennosti i mineralnykh primesey ugley pri petrograficheskikh i elektronno-mikroskopicheskikh issledovaniyakh (Research of oxidation and mineral impurities of coals during petrographic and electron-microscopic researches). Khimiya tverdogo topliva = Solid Fuel Chemistry. 2013. No. 2. pp. 57–61.
18. Arisoy A., Beamish B. Mutual effects of pyrite and moisture on coal self-heating rates and reaction rate data for pyrite oxidation. Fuel. 2015. Vol. 139. pp. 107–114.
19. R. Kh. Gumarov, I. S. Sofiev, D. T. Zabramnyy, F. E. Michnikova. Sposob opredeleniya stepeni okislennosti kamennogo uglya v plaste (Method of definition of coal oxidation degree in layer). Certificate of Authority No. 353196, IPC7, G01N31/22. Applied: May 13, 1970. Published: September 29, 1972. Bulletin No. 29.
20. Raja Sen, Sunil K. Srivastava, Madan Mohan Singh. Aerial oxidation of coal-analytical methods, instrumental techniques and test methods: A survey. Indian Journal of Chemical Technology. 2009. Vol. 16. pp. 103–135.
21. Fredericks P. M., Warbrooke P., Wilson M. A. Сhemical changes during natural oxidation of a high volatile bituminous coal. Org Geochem. 1983. Vol. 5. pp. 89–97.
22. Giroux L., Kolijn C. J., Pichler F. S. Storage of small samples of coking coal for thermal rheological tests. Fuel Process Technol. 2006. Vol. 87. pp. 547–561.
23. Alekhnovich A. N. Tekhnicheskie kharakteristiki i reaktsionnye svoystva okislennykh ugley (Technical characteristics and reaction properties of oxidized coals). Energetik = Power Engineering Specialist. 2010. No. 8. pp. 16–20.
24. Wagner N. J. The characterization of weathered discard coals and their behavior during combustion. Fuel. 2009. Iss. 8-9, Vol. 87. pp. 1687–1697.
25. Kukharenko T. A. Khimiya i genezis iskopaemykh ugley (Chemistry and genesis of fossil coals). Moscow : Gosgortekhizdat, 1960. pp. 152–181.
26. Shkuratnik V. L., Novikov E. A. Correlation of thermally induced acoustic emission and ultimate compression strength in hard rocks. Journal of Mining Science. 2012. Iss. 4, Vol. 48. pp. 629–635.
27. Novikov E. A., Shkuratnik V. L., Epshteyn S. A., Nesterova V. G., Dobryakova N. N. O vozmozhnosti otsenki okislennosti uglya po akusticheskoy emissii, stimulirovannoy v nem termoudarnym vozdeystviem (About the possibility of assessment of coal oxidation degree by acoustic emmission, stimulated by thermal impact). Gornyy Informatsionno-Analiticheskiy Byulleten = Mining Information-Analytical Byulletin. 2013. No. 8. pp. 90–96.

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