Photocatalytic desulfurization of gasoline by TiO₂ coupling with ultrasonic

The photocatalytic oxidation of dibenzothiophen (DBT) in octance (as solvent) was conducted using O₂ in air as the oxidant, TiO₂ prepared by sol-gelatin method as the photocatalyst and coupling with ultrasonic. The effect of light distance, photocatalyst amount, reaction time, DBT initial concentration and ultasonic power on the removal of DBT were investigated deeply. The results show that the degradation rate of DBT increases by 10% by using ultrasonic. Under the conditions of TiO₂ dosage of 2g/L, air flow rate of 800mL/min, distance of UV light of 20cm, initial concentration of DBT of 600mg/L, reaction time of 150min, ultrasound power of 500W, the degradation rate of DBT can reach up to 72.6%.