Thermolysis of Waste Engine oil (WEO) was performed in a semi-batch reactor in the temperature range of 450–575 °C. The highest yield of pyrolytic oil was obtained (76.73%) at 550 °C temperature. The comparative study between the thermogravimetric analysis (TGA) and pyrolysis experiment disclosed that the conversion of WEO was 99.34% in TGA and 98.23% in pyrolysis experiment. The fuel properties such as density (795 g cc⁻¹), calorific value (42.40 MJ kg⁻¹), and flash point (33 °C) 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 in the 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 of WEO. 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).

中文翻译：

---

废机油（WEO）的热化学转化为富含汽油的原油

废机油（WEO）的热解是在450-575°C的半间歇式反应器中进行的。在550°C的温度下可获得最高的热解油收率（76.73％）。热重分析与热解实验的对比研究表明，热重分析中WEO的转化率为99.34％，热解实验为98.23％。燃料特性，例如密度（795 g cc ^-1），发热量（42.40 MJ kg ^-1）），热解油的闪点（33°C）低于汽油。与WEO相比，热解油中Ca，Fe，Mg，Ni，Pb，As，Mn，Zn和Cu的浓度降低了。注意到在热解过程中热解油中化学成分的转变。该热解油的组成比WEO低，其中芳族化合物为38％，烷烃为32.97％，环烷烃为7.97％，烯烃为11.9％，聚芳烃化合物为4.78％。WEO热解油包含65％的汽油增程烃化合物（C9–C12），24.53％的煤油（C11–C15），7.47％的柴油（C15–C19）和15.32％的重质燃油（˃C19） ）。