THE INFLUENCE OF HYDROCARBON FEEDSTOCK PROCESSING CONDITIONS ON THE STRUCTURE AND PROPERTIES OF ELECTRODE COKE AND GRAPHITE BASED ON IT

This study investigates the process of hydrogenation under pressure of coal tar from coke-chemical production in the presence of a catalyst. The research focuses on reducing the sulfur content in the tar and producing new raw material components (filler coke) for carbon materials with functional purposes (such as graphitized electrodes with high thermal and electrical conductivity, density, and strength, as well as anodes and cathodes for the production of aluminum, magnesium, and other metals). A conceptual technological scheme has been developed to test various types of tars through the stages of catalytic hydrogenation, filtration, distillation, and coking, with material balances of the process determined. The possibility of reducing sulfur content in the tar and producing low-sulfur coke with various structures from it has been demonstrated. The addition of hydrogen donors of different natures and production methods to the tar before hydrogenation, as well as changes in hydrogenation conditions under the same temperature parameters, revealed the potential for specialized feedstock preparation to obtain low-sulfur needle-structured coke. Samples of isotropic, regular, and needle-structured coke were obtained from pre-hydrogenated coal tar from various plants at coking temperatures of 700–900 °C. It was shown that the composition of the raw material mixture and the hydrogen-to-feedstock ratio have a greater impact on the quality of the hydrogenate and the coke derived from it than the catalytic system. The composition and microstructure of cokes derived from hydrogenated tars were studied, including the determination of the average microstructure score and the distribution of structural components. Recommendations were provided for the use of cokes from hydrogenated coal tars as raw materials for carbon materials with various applications. For citation: Beylina N.Yu., Dobryakova N.N., Ozerenko A.A., Antonyuk S.N., Nikishin D.V. The influence of hydrocarbon feedstock processing conditions on the structure and properties of electrode coke and graphite based on it. ChemChemTech [Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol.]. 2025. V. 68. N 6. P. 106-116. DOI: 10.6060/ivkkt.20256806.7191.