Studies of the Interconnection of the Structure of Fossil Coal and the Concentrations of Polycyclic Aromatic Hydrocarbons in It
N. V. ZHURAVLEVA1,2, E. R. KHABIBULINA1,2, Z. R. ISMAGILOV1,3, R. R. POTOKINA1,2, S. A. SOZINOV4
1Institute of Coal Chemistry and Material Science, Federal Research Centre of Coal and Coal Chemistry, Siberian Branch of the Russian Academy of Sciences, Sovetskiy Pr. 18, Kemerovo 650000
2West Siberian Test Centre OJSC, Ul. Ordzhonikidze 9, Novokuznetsk 654006
3Boreskov Institute of Catalysis, Siberian Branch of the Russian Academy of Sciences, Pr. Akademika Lavrentyeva 5, Novosibirsk 630090
4Shared Centre of the Federal Research Centre of Coal and Coal Chemistry, Siberian Branch of the Russian Academy of Sciences, Ul. Rukavishnikova 21, Kemerovo 650000
Keywords: каменный уголь, полициклические ароматические углеводороды, высокоэффективная жидкостная хроматография, ЯМР-спектроскопия, black coal, polycyclic aromatic hydrocarbons, high-performance liquid chromatography, NMR spectroscopy
Abstract
Coal samples of different grades representing the sequence of metamorphic transformation were studied. It was established by means of NMR spectroscopy that the contribution from carbon in structural fragments of aromatic rings increases with an increase in coal maturity. The contribution from the end atoms of alkyl fragments and oxygen-containing groups decreases proportionally. The qualitative and quantitative composition of the individual representatives of the class of polycyclic aromatic hydrocarbons (PAH) in the organic extracts of black coal was determined by means of high-performance liquid chromatography. Coal of K and KS grades is characterized by the maximal total concentration of PAH - from 363.4 to 432.0 μg/kg. The regularity of the change of total PAH composition with an increase in coal maturity was revealed. The maximum of the curve corresponds to the samples with vitrainite reflectance factor equal to 1.185-1.310 %.
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