Abstract
A kind of highly active TiO2 was prepared and applied in the extractive and catalytic oxidative desulfurization (ECODS) system. The catalyst was synthesized through a simple method and characterized by X-ray powder diffraction (XRD), Raman, Fourier transform infrared (FT-IR) and X-ray photoelectron spectroscopy (XPS). Various of reaction conditions were investigated on the removal of dibenzothiophene (DBT), and a sulfur removal of 99.1% was obtained under 40°C in 90min. In addition, electron spin resonance (ESR) spectroscopy and gas chromatography–mass spectrometer (GC–MS) measurements were employed to investigate the reaction mechanism. It was proved that superoxide radical (O2−) was the active oxygen species and DBTO2 was the only oxidation product of DBT in the ECODS system. The recycling experiments indicated that sulfur removal could still reach 95.5% after 12 times.
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