The co-pyrolysis of waste tires and waste engine oil

In this study, waste engine oil (WEO) was used as catalyst for co-pyrolysis with waste tires (WT) to increase the heat transfer efficiency between tire particles. The synergetic effects during co-pyrolysis process of WT and WEO were investigated via thermogravimetric analyzer. Co-pyrolysis of different mixing ratios blends were performed in a self-made tube furnace at 500celcius to explore the effect on product distribution. The compositions of products were determined by FTIR, Py-GC/MS, and BET. TG and DTG curves of mixture demonstrate that WEO could change the pyrolysis process of WT significantly. The main pyrolysis temperature is reduced by 50celcius. The conversion of pyrolysis oil increased, and the conversion of char decreased with the addition of WEO. The yield of H-2 and D-limonene increased by 5.6% and 1.85%, respectively, when 20% WEO was added. Our work gives insight into the co-pyrolysis of WT and WEO, and provides a novel route of WT pyrolysis with high efficiency and quality.