Catalytic pyrolysis of car tire waste using expanded perlite

In this study, the non-catalytic and catalytic pyrolysis experiments were conducted on the sample of tire waste using expanded perlite as an additive material to determine especially the effect of temperature and catalyst-to-tire ratio on the products yields and the compositions and qualities of pyrolytic oils (NCPO and CPO). Non-catalytic studies, which were carried out under the certain conditions (a nitrogen flow of 100 mL/min and a heating rate of 10 °C/min), showed that the highest yield of pyrolytic oil (NCPO) was 60.02 wt.% at 425 °C. Then, the catalytic pyrolysis studies were carried out at catalyst-to-tire ratio range of 0.05-0.25 and the highest catalytic pyrolytic oil (CPO) yield was 65.11 wt.% at the ratio of 0.10 with the yield increase of 8.48 wt.% compared with the non-catalytic pyrolysis. Lastly, the pyrolytic oils were characterized with applying a various techniques such as elemental analyses and various chromatographic and spectroscopic techniques (GC-MS, ¹H NMR, FT-IR, etc.). The characterization results revealed that the pyrolytic oils which were complex mixtures of C₅-C₁₅ organic compounds (predominantly aromatic compounds) and also the CPO compared to the NCPO was more similar to conventional fuels in view of the certain fuel properties.