Cracking of Waste Engine Oil in the Presence of Fe3O4

Waste engine oil (WEO), as a waste resource, has not been fully exploited. Using WEO as a reductant for copper slag cleaning is quite meaningful. Fe3O4 is an important element in copper slag cleaning. So the laws of thermal cracking of WEO at different temperatures and the effect on thermal cracking of WEO in the presence of Fe3O4 were investigated. The results show that the high-temperature cracking of WEO mainly produces H2, CO, CH4, CO2, and small molecules such as C. Raising the temperature is good for the cracking of WEO. When the temperature rises from 700 °C to 1300 °C, the total amount of gases produced by cracking 700 μL of WEO increases from 177.08 mL to 1010.2 mL. At 1300 °C, the total amount of gases produced by the cracking of WEO in the presence of Fe3O4 was 1408.11 mL. The result indicates that Fe3O4 can promote the pyrolysis of waste oil. This research provides a novel approach to the clean utilization of WEO.