Authors: A.S. Zyabrev, K.Y. Ushakov, Vilisov , Azikhanov

Title of the article: Analysis of the surface of a solid carbon residue of the process of carbon dioxide activation of rubber wastes

Year: 2023, Issue: 2, Pages: 48-55

Branch of knowledge: 2.6.12. Chemical technology of fuel and high-energy substances

Index UDK: 658.567.1

DOI: 10.26730/1999-4125-2023-2-48-55

Abstract: The authors review the original method of recycling the large-sized tires of mine dump trucks. This method consists of sequential pyrolysis and gasification of rubber crumbs in order to obtain liquid, gaseous and solid commercial products. The analysis of the surface of the solid carbon residue after the pyrolysis process of rubber crumbs (temperature 600 °C) and its carbon dioxide gasification at temperatures 940 °C, 960 °C, 980 °C was carried out. The article presents elemental composition, electron microscopic images and maps of the distribution of elements on the surface of solid carbon-containing residue samples. Carbon is the main element in the composition of a solid carbon-containing residue (from 73 to 89% by weight). The overlap of areas on the element distribution map suggests the presence of such chemical elements as ZnS, Ca, etc. on the surface. An increase in the temperature of carbon dioxide activation leads to changes in the structure of the carbon framework and the formation of a porous structure of the SCR surface, as well as to a reduction in the amount of inorganic impurities on the SCR surface, as it is shown in the article. The data obtained in this research will be used in the study of the physicochemical properties of the solid carbon-containing residue of the tire gasification stage and in the assessment of its suitability for use as a sorbent.

Key words: recycling of rubber products waste pyrolysis gasification solid carbon residue rubber crumb giant tyres

Receiving date: 09.12.2022

Approval date: 10.05.2023

Publication date: 15.06.2023

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