Authors: N.I. Fedorova, E.S. Mikhailova, Z.R. Ismagilov

Title of the article: Physical and chemical properties of the vitrinite concen-trates of of the Kuznetsk basin coals

Year: 2017, Issue: 4, Pages: 164-169

Branch of knowledge: Chemical technology

Index UDK: 662.6:552

DOI: 10.26730/1999-4125-2017-4-164-169

Abstract: In accordance with the modern level of development of the science of coal and the world experience in the operation of coke-chemical plants, during preparation of charges for coking, it is necessary to take into account the material composition and properties of coking coals, primarily their organic component being the main carrier of the properties of fossil coals. Of the four groups of microcomponents (vitrinite, semivitrinite, inertinite and liptinite) making up the organic matter of coals, vitrinite being responsible for the sintering of coals, solubility in organic solvents, mechanical and other properties, is of decisive importance for technologi-cal properties. Eight samples of vitrinite concentrates extracted from coals of various stages of metamorphism were stu-died. With the use of chemical and physicochemical methods of analysis (technical and elemental analysis, IR- and 13C NMR spectroscopy, etc.), analytical data reflecting the change in the composition of their organic mass from the degree of coalification have been obtained. It has been established that with an increase in the level of metamorphism in vitrinite concentrates, the yield of volatile substances (Vdaf) decreases, the carbon content increases from 82.2 to 88.5%, and the content of oxygen and heteroatoms in the organic mass decreases from 11.8 to 6.2%. The data of IR- and 13C NMR spectroscopy has shown that with an increase in the value of the vitrinite ref-lection index, the index of fa aromaticity of the samples studied increases from 0.69 to 0.86.

Key words: coal metamorphism vitrinite elemental composition calorific value of coal calorimetry IR- spectroscopy 13C NMR spectroscopy

CITE DOWNLOAD