Abstract
Thermal pyrolysis of waste tires without metals has been studied in a rotating kiln reactor under nitrogen atmosphere. The pyrolysis temperature was varied in a wide range from 400 up to 1050 °C to investigate the effect of temperature on pyrolysis products. The pyrolytic oil during each pyrolysis process was reported in different pyrolysis times. It was found that the maximum yield of pyrolytic oil was 44 wt% in 550 °C. However, by raising the temperature of the pyrolysis process, the yield of produced gas increased, while the yield of produced char decreased. In addition, Fourier transform infrared spectroscopy (FT-IR) was performed in order to specify functional groups and types of bonds at different temperatures. FT-IR analysis showed the presence of some undesired compounds with sulphur and nitrogen functionalities in pyrolytic oil. Also, the properties of maximum produced oil were analyzed. The distillation data of maximum pyrolytic oil revealed that there was 14%, 4%, and 36% of light naphtha (>160 °C), heavy naphtha (160–200 °C) and middle distillate (200–350 °C), respectively and the fraction of VGO (<350 °C) was 46%.
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