PHYSICO-CHEMICAL PROPERTIES OF ANTHRACITE OF KUZBASS
The relevance of the work is determined by the fact that the prospects for creating new and intensifying existing processes for processing solid fossil fuels are associated with studies of their composition, properties and reactivity. The purpose of this study is devoted to a comprehensive study of the physicochemical properties of anthracites in the Kuznetsk Basin. As objects of research, we used two samples of anthracite coals mined at the Bungurskiy and Krasnogorskiy coal pits. Anthracite samples were characterized using a complex of chemical and physicochemical methods of analysis (technical and elemental analyzes, analysis of ash composition, thermogravimetric analysis, IR and 13C NMR spectroscopy). The totality of the obtained analytical data shows that the studied samples have close values of the established parameters. The samples are characterized by low ash content, volatile content and low total sulfur content. The mineral part of anthracites is dominated by clay minerals such as kaolinite and illite. The results of IR- and 13C NMR- spectroscopy revealed that aromatic fragments, the proportion of which changes insignificantly and amounts to more than 91%, dominate the structure of the studied samples. Thermogravimetric analysis established that the samples have a sufficiently high thermal stability. The peak of the main decomposition has a wide range (from 450 to 1200°C) and low intensity, the maximum decomposition rate is reached at 735° C.