RESEARCH OF PHYSICAL AND CHEMICAL CHARACTERISTICS OF TECHNICAL CARBON OBTAINED BY THE PYROLYSIS OF WASTE CAR TIRES

Background: In the world, the number of car parks is increasing annually, which naturally leads to the formation of used tire dumps. According to statistics from the European Tire Recycling Association, more than 9 million tons are formed in Europe. depreciated car tires. In the United States in 2010, the number of worn tires was 1.5 million tons. In the UK, almost 500 thousand tons of used tires are formed annually, of which 34% of this volume is processed, 26% is recovered, 15% is burnt and 6% is transported to landfills. In Japan, in 2008, 96 million used tires were formed (1,056 thousand tons), of which 88.5% were recycled over the same period, in France more than 400 thousand tons, in Germany 460-510 thousand tons, and Russia formed more than 1 million tons. worn tires, of which no more than 10% is processed. Among the existing methods for the disposal of used car tires, the best method is thermal decomposition-pyrolysis. Car tire is a valuable secondary raw material containing rubber - 65-70%, carbon black - 15-25%, metal cord - 10-15%. Purpose. The study of the physicochemical characteristics of carbon black obtained by pyrolysis of worn automobile tires. Methodology. The resulting carbon black was studied by density, ash, pH, and particle size distribution by guest methods and the composition was determined by x-ray and IR spectroscopic methods. Originality. For the first time, the physicochemical characteristics of carbon black obtained by pyrolysis of worn automobile tires were investigated, and the composition of carbon black was determined by modern physicochemical methods. Findings. The paper presents the results of a study of the physicochemical characteristics of carbon black obtained by the pyrolysis of worn automobile tires. Determined are bulk density, ash content, pH, mass fraction of moisture and particle size distribution of ground carbon black. It has been established that a decrease in the particle size of carbon black leads to an increase in bulk density, acidity, humidity and practically does not affect the ash content. X-ray phase analysis determined that, mainly, technical carbon consists of amorphous carbon (88.4%), calcite (7.59 %), ankerite (1.21%), zinc oxide (1.14%) and other components . According to the results of thermal analysis, the temperature range of the decomposition of carbon black residues in the range of 150-9000C is determined. Therefore, based on the obtained physicochemical characteristics of carbon black, it is of great importance to determine the scope of application by the consumer. . Highlights: - carbon black was obtained by pyrolysis of worn automobile tires; - it is recommended as a filler of rubber products.