WO3-TiO2/SBA-15的光催化氧化柴油脱硫性能

以钛酸四正丁酯为钛源、钨酸钠为钨源、SBA-15为催化剂载体，采用孔道内水解法制备WO3-TiO2/SBA-15样品并用XRD、BET进行表征，并将其应用于模拟柴油的光催化氧化脱硫实验，考察催化剂用量、n（O）/n（S、反应温度、反应时间等对光催化氧化脱硫的影响。结果表明：在催化剂用量为4 g/L、n（O）/n（S）为8、反应温度为50 ℃、反应时间为2 h的条件下，模拟柴油的脱硫率可达87.9%，催化剂重复使用5次后脱硫率仍可达到64.9%。表明WO3-TiO2/SBA-15催化剂具有较好的光催化氧化脱硫性能和再生性能。

STUDY OF PHOTOCATALYTIC OXIDATION DESULFURIZATION OF DIESEL WITH WO3-TiO2/SBA-15

SBA-15 was modified by bimetal using the innel-pore hydrolysis method and characterized by means of XRD，N2 adsorption-desorption, the results showed that WO3-TiO2/SBA-15 retained the hexagonal mesoporous structure. The Photocatalytic oxidation desulfurization performance of WO3-TiO2/SBA-15 catalyst was investigated using dibenzothiophene and dodecane solution as the simulation diesel and the mass fraction of 30% H2O2 as oxidant under UV light irradiation. The process conditions of the reaction were determined by static experiments, and the optimum reaction condictions were as follows: the catalyst dosage was 4 g/L, O/S molar ratio was 8, reaction temperature was 50 ℃, reaction time was 2 h. Under the condition, the desulfurization rate of simulation diesel was up to 87.9%. After the catalyst was reused for five times, the desulfurization rate could still reach 64.9%, indicating that WO3-TiO2/SBA-15 had good performances of photocatalytic oxidation desulfurization and recyclable.