Thermochemical conversion of waste engine oil (WEO) to gasoline‑rich crude oil

摘要

Thermolysis of Waste Engine oil (WEO) was performed in a semi-batch reactor in the temperature range of 450–575 ℃.The highest yield of pyrolytic oil was obtained (76.73%) at 550 ℃ temperature. The comparative study between the thermogravimetricanalysis (TGA) and pyrolysis experiment disclosed that the conversion of WEO was 99.34% in TGA and98.23% in pyrolysis experiment. The fuel properties such as density (795 g cc~(−1)), calorific value (42.40 MJ kg~(−1)), and flashpoint (33 ℃) of the pyrolytic oil were less compared to petrol. The decrease in the concentration of Ca, Fe, Mg, Ni, Pb, As,Mn, Zn, and Cu in the pyrolytic oil compared to WEO was perceived. The transformation in the chemical compositions inthe pyrolytic oil during the course of pyrolysis was noticed. The pyrolytic oil had a composition of 38% aromatics, 32.97%alkanes, 7.97% cyclo-alkanes, 11.9% alkenes, and 4.78% poly-aromatic hydrocarbons compounds was lower than that ofWEO. The WEO pyrolytic oil was containing 65% of gasoline ranged hydrocarbon compounds (C9–C12) along with 24.53%of kerosene (C11–C15), 7.47% of diesel (C15–C19), and 15.32% of heavy fuel oil (˃ C19).