The Environmental and Economic Impacts of Tire Recycling Technologies

Aims: Study of physical and chemical characteristics of technical carbon obtained by pyrolysis of worn automobile tires. Development of carbon-containing filler of composite elastomer materials for obtaining products based on them with a given structure, physical, mechanical and dynamic properties. Study Design: The physicochemical characteristics of carbon black obtained by pyrolysis of worn-out automobile tires were studied, and its composition was determined using modern physicochemical methods. Place and Duration of Study: Sample: Navoi State Mining and Technological University, Faculty of Chemical Technology Navai in the period from June 2023 to July 2024. Methodology: The density, ash content, pH and granulometric composition of the obtained technical carbon were studied using standardized methods and its qualitative and quantitative composition was determined using X-ray phase and IR spectroscopic methods. Results: The physicochemical characteristics of carbon black obtained by pyrolysis of worn-out automobile tires were studied. The bulk density, ash content, pH, mass fraction of moisture and granulometric composition of crushed carbon black were determined. It was found that a decrease in the particle size of carbon black leads to an increase in bulk density, acidity, humidity and has virtually no effect on ash content. X-ray phase analysis showed that carbon black mainly consists of amorphous carbon (88.4%), calcite (7.59%), ankerite (1.21%), zinc oxide (1.14%) and other components. Based on the results of thermal analysis, the temperature range of decomposition of carbon black residues was determined to be in the range of 150-9000C. Conclusion: The physicochemical characteristics of technical carbon obtained by pyrolysis of worn-out automobile tires were studied. The bulk density, ash content, pH, mass fraction of moisture and granulometric composition of crushed technical carbon were determined. It was established that a decrease in the particle size of technical carbon leads to an increase in bulk density, acidity, humidity and has virtually no effect on ash content.