The Environmental and Economic Impacts of Tire Recycling Technologies
Juraev Shokhrukh
Navoi State University of Mining and Technologies, 210100, Galaba Avenue 76v, Navoi City, Navoi Region, Uzbekistan.
Sodiqov Bobir
Navoi State University of Mining and Technologies, 210100, Galaba Avenue 76v, Navoi City, Navoi Region, Uzbekistan.
Tilloyeva Nilufar
Navoi State University of Mining and Technologies, 210100, Galaba Avenue 76v, Navoi City, Navoi Region, Uzbekistan.
Temirov Uktam *
Navoi State University of Mining and Technologies, 210100, Galaba Avenue 76v, Navoi City, Navoi Region, Uzbekistan.
*Author to whom correspondence should be addressed.
Abstract
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.
Keywords: Pyrolysis, carbon black, rubber, bulk density, ash content, moisture, X-ray phase analysis, derivatography, IR spectroscopy, microscopy