石油炼制与化工 ›› 2016, Vol. 47 ›› Issue (6): 78-83.

• 催化剂 • 上一篇    下一篇

WO3-TiO2/SBA-15的光催化氧化柴油脱硫性能

张璐璐,詹金友,孙尧,沈健   

  1. 辽宁石油化工大学石化学院
  • 收稿日期:2015-10-30 修回日期:2015-12-07 出版日期:2016-06-12 发布日期:2016-06-02
  • 通讯作者: 沈健 E-mail:lnshenjian@126.com

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

  • Received:2015-10-30 Revised:2015-12-07 Online:2016-06-12 Published:2016-06-02

摘要:

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。

关键词: WO3-TiO2/SBA-15, 光催化, 氧化, 脱硫

Abstract:

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.

Key words: WO3-TiO2/SBA-15, photocatalysis, oxidation, desulfurization