Photocatalytic desulfurization of gasoline by TiO2 coupling with ultrasonic
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摘要: 采用溶胶凝胶法制备纳米TiO2光催化剂，引入超声作用，以空气中的氧气为氧化剂，正辛烷为模拟油品对燃料油中硫化物的脱除进行了研究。考察了光照强度、催化剂用量、反应时间、 二苯并噻吩（DBT）初始浓度、超声功率等因素对TiO2光催化二苯并噻吩溶液降解效率的影响。结果表明，引入超声后DBT的降解率提高了10%左右，并在 TiO2用量为2g/L，通气量为800mL/min，光照距离20cm，DBT初始浓度为600mg/L，反应时间为150min，超声功率为500W的条件下，DBT降解率达到了72.6%。Abstract: 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%.
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Key words:
- photocatalytic oxidation /
- TiO2 /
- dibenzothiophene /
- desulfurization /
- ultrasound
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