Authors: E.S. Mikhaylova, O.M. Gavriljuk, Z.R. Ismagilov

Title of the article: Analysis of thermal transformations of fossil coals of various degrees of metamorphism using a complex of physical and chemical research methods

Year: 2021, Issue: 4, Pages: 34-40

Branch of knowledge: 05.17.07 Chemical technology of fuel and high-energy substances

Index UDK: 662.742.1

DOI: 10.26730/1999-4125-2021-4-34-40

Abstract: In this work, 3 samples of coals were investigated in order to determine the maximum yield of resinous products from low-coking coals. To describe the chemical composition and chemical-technological properties of the products obtained in the process of low-temperature pyrolysis, the following methods of studying the samples were used: technical, elemental, petrographic analyses, thermogravimetry, and chromato-mass-spectrometry. The method of chromatography-mass spectrometry revealed that during the thermal destruction of coal, liquid products are formed, which are represented by a complex mixture of saturated and aromatic hydrocarbons. Normal and branched n-alkanes and n-alkenes were identified in all resins. The aromatic hydrocarbons of the studied resins contain from one to five benzene rings in molecules. The different amounts of these components in the composition of liquid products are due to differences in the chemical composition of the organic matter of the studied coals. The data obtained allow us to conclude that grade D coal has the highest yield of resin-forming components, and can be used both independently and as a component of the charge at coking plants.

Key words: coal coal tar thermal decomposition products

Receiving date: 20.05.2021

Publication date: 15.09.2021

CITE DOWNLOAD