Oxidative Desulfurization of Tire Pyrolysis Oil over Molybdenum Heteropolyacid Loaded Mesoporous Catalysts

Pyrolysis oil derived from waste tires consists of sulfur content in the range 7000 to 9000 ppm. For use diesel engines, its must be lowered 10 15 Though conventional hydrodesulfurization is suitable for removal tire pyrolysis oil, high cost provides an avenue alternative desulfurization technologies explored. In this study, oxidative (ODS), a low-cost technology, was explored oil. Two categories titanium-incorporated mesoporous supports with 20 wt% loaded heteropoly molybdic acid catalyst (HPMo/Ti-Al2O3 and HPMo/Ti-TUD-1) were developed tested ODS at mild process conditions. Catalysts characterized by X-ray diffraction, BET-N2 physisorption, photoelectron spectroscopy (XPS). The incorporation Ti into Al2O3 TUD-1 frameworks confirmed XPS. surface acidity catalysts studied temperature-programmed desorption NH3 pyridine FTIR analyses. HPMo/Ti-Al2O3 HPMo/Ti-TUD-1 contained both Lewis Brønsted sites. presence titanium found promote activity phosphomolybdic acid. Ti-TUD-1-supported performed better than Ti-Al2O3-supported Hydrogen peroxide cumene oxidants tert-butyl hydroperoxide oxidizing compounds Process parameter optimization design experiments conducted optimal along regeneration study. An ANOVA statistical analysis demonstrated that oxidant/sulfur catalyst/oil ratios more significant reaction temperature It followed pseudo-first-order kinetics over HPMo/Ti-TUD-1.