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End of life tires (ELTs) and waste polyethylene terephthalate (WPET) bottles are important environmental problems. “Pyrolysis”, which is a thermochemical process, is an important method to reuse of these waste materials. In this study, firstly, a prototype pyrolysis reactor was designed, experimental duration was determined by preliminary tests and experiments were planned. 4-stages decompositions (200, 250, 300 and 350°C), 5-stages pre-condensations (-20, -10, 0, +10 and +20°C) with a cooler engine and final condensations were carried out, respectively. In pyrolysis cell of this designed reactor, for 300 g WPET, no gasification occurred during any of the decomposition temperatures, therefore condensation was not observed. Moreover, linear, not forming a network and resistant to breakage WPET froze when passing through pipes during decomposition temperature of 350°C and led to a blockage in the system. ELT pyrolysis was limited to the same conditions to evaluate ELT and WPET’s pyrolysis together. When 300 g ELT was placed in the pyrolysis cell, no gasification was obtained in 200 and 250°C decomposition temperatures, respectively, resulting in no condensation. In 300°C decomposition temperature, ELT became pastry and did not gasify in any decomposition temperatures; this led to no condensation. In 350°C decomposition temperature, gasification started. Therefore, the solid products (carbon black) were obtained in the range of 232-256 g and the liquid products (pyrolytic oil) were obtained as 50, 54, 32 and 28 mL, respectively, in the four condensation (-10, 0, +10 and +20°C) temperatures. In this reactor, we began to produce solid and liquid products in 350°C decomposition temperature, when WPET pyrolysis ended, by means of ELT pyrolysis, which results in volatile organic matter of tires (basically rubber/plastic polymer/s) decomposing to low molecular weight liquid or gas. Keywords : Waste, reuse, environment, end of life tires, polyethylene terephthalate, pyrolysis

ÖMRÜNÜ TAMAMLAMIŞ LASTİK VE POLİETİLEN TEREFTALAT (PET) ŞİŞE ATIKLARININ PİROLİZİNİN TASARLANAN YENİ BİR REAKTÖRDE KIYASLANMASI