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Description
The objective of this study is to examine the thermal co-pyrolysis process of waste plastics and used engine oil as the effect of plastic material, tempera-ture, and reactor diameter. HDPE, PP, and PS have been used as waste plas-tic samples. Co-pyrolysis method was used in this experimental work, by combining the two materials into one reactor with a total weight of 400 gr with a ratio of 62.5% waste plastic and 37.5% used engine oil. The experi-ments were carried out on a small-scale vertical tube reactor heated by an electric heater. The thermal pyrolysis experiments were carried out at the re-actor temperature of 400, 450, and 500°C and the reactor diameter of 60, 80, and 100 mm. The results show that there is a synergistic effect that occurs when the two materials are combined. The highest liquid yield was obtained at the temperature of 500 °C as much as 65.56% for HDPE. Different results has been found for PP, where the highest yield (66,3%) could be obtained at the temperature of 450 C. The larger the reactor, the less liquid product is produced and the longer the process takes.
