CALCULATION THE WEIGHT LOSS KINETICS OF WASTE TIRE AND HEAVY OIL RESIDUE SAMPLES BY TGA RESULTS USING INTEGRAL METHOD OF COATS-REDFERN

This article presents the calculation results of the weight loss kinetics of waste tire and heavy oil residue samples, which were calculated by the results of their thermogravimetric analysis (TGA). These wastes are not biodegradable and represent, on the one hand, a great potential danger to the environment, and on the other hand, huge reserves of secondary raw materials for processing into alternative fuels and organic materials. Joint thermal catalytic processing of used tires with a heavy oil residue into motor fuels and valuable organic compounds is very promising. The heavy oil residue in the processing of carbon-containing waste is used as a hydrogen donor, raw material and a paste-forming agent of feedstock. Based on the TGA results of a tire sample, it was determined that a sharp mass loss of the rubber mass begins at a temperature of 340ºC. According to the TGA results of the testing samples, it was determined that a sharp loss of the rubber mass begins at a temperature of 340ºC, while this was observed at a temperature of 265ºC in the mass of heavy oil residue. This early thermal degradation of the heavy oil residue compared to the waste tire sample makes it possible to use it as a paste-forming agent in the processing of carbon-containing wastes. According to the results of calculating the activation energy of the testing samples by using an integral method of Coats- Redfern, it was determined that in the temperature range 400-500ºC, C-C bonds are broken in the waste tire sample, whereas С-С and С-Н bonds are broken in the heavy oil residue sample. These results prove the possibility of using a heavy oil residue as a hydrogen donor for processing carbon-containing waste.

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