NMR Spectroscopy of Black Coal from the Kuznetsk Basin
N. I. FEDOROVA1, S. YU. LYRSHCHIKOV1, Z. R. ISMAGILOV1,2
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
2Boreskov Institute of Catalysis, Siberian Branch of the Russian Academy of Sciences, Pr. Akademika Lavrentyeva 5, Novosibirsk 630090
Keywords: каменные угли, стадии метаморфизма, элементный состав, 13С ЯМР-спектроскопия, black coal, metamorphism stages, elemental composition, 13С NMR spectroscopy
Abstract
For the first time, 22 samples of black coal of different stages of metamorphism sampled at coal mining enterprises of the Kuznetsk Basin were studied by means of 13С NMR spectroscopy. Analysis of the analytical data showed that the degree of coal aromaticity (fa) increases from 0.68 to 0.85 with an increase in the stage of metamorphism. It was established that an increase in aromaticity index (fa) of the organic mass of coal is proportional to a decrease in the amount of aliphatic carbon in the structural fragments within the range 0-51 ppm.
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