›› 2017, Vol. 48 ›› Issue (10): 11-16.

• 催化剂 • 上一篇    下一篇

F127-MoO3/Al2O3的制备及其催化氧化脱除二苯并噻吩的研究

金伟1,田永胜1,曾丹林2,王光辉1   

  1. 1. 武汉科技大学化学与化工学院湖北省煤转化与新型炭材料重点实验室
    2. 武汉科技大学化学工程与技术学院
  • 收稿日期:2017-04-06 修回日期:2017-05-09 出版日期:2017-10-12 发布日期:2017-09-28
  • 通讯作者: 金伟 E-mail:jinweiwust@163.com
  • 基金资助:
    国家自然科学基金资助项目

SYNTHESIS OF F127-MoO3/Al2O3 AND ITS PERFORMANCE OF OXIDATIVE REMOVAL OF DIBENZOTHIOPHENE

  • Received:2017-04-06 Revised:2017-05-09 Online:2017-10-12 Published:2017-09-28

摘要: 以聚环氧乙烷-环氧丙烷-环氧乙烷 (F127) 为模板剂,通过沉淀法制备F127-MoO3/Al2O3催化剂,对催化剂进行FT-IR,XRD,FE-SEM表征,并考察催化剂的制备条件和催化氧化脱硫反应条件对含二苯并噻吩(DBT)模型油的催化氧化脱硫效果的影响。结果表明:在AlCl3的质量为3.17 g的前提下,催化剂的最优制备条件为m(Mo)/m(Al2O3)=30%、F127添加量0.38 g、焙烧温度540 ℃,模板剂F127的加入促进了MoO3在Al2O3表面的分散;催化氧化脱硫的最佳反应条件为m(催化剂)/m(模型油)=0.71%、V(H2O2)/V(模型油)=0.30%、反应温度60 ℃、反应时间10 min,在该条件下,DBT脱除率接近100%,DBT氧化产物全部转化为二苯并噻吩砜;催化剂经再生后重复使用8次,催化活性略有下降,但DBT脱除率仍可以达到95.81%。

关键词: 催化剂, 聚环氧乙烷-环氧丙烷-环氧乙烷, 氧化铝, 氧化钼, 二苯并噻吩 , 氧化脱硫

Abstract: F127-MoO3/Al2O3 catalysts were prepared by precipitation method using poly ethylene oxide - propylene oxide - ethylene oxide (F127) as template agent, and characterized by Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), and field emission scanning electron microscope (FE-SEM). The influences of catalyst preparation and reaction conditions on oxidative desulfurization of model oil were investigated. The result showed that the addition of F127 as template agent promotes the high dispersion of MoO3 on the surface of Al2O3. For 10.0 ml model fuel (mass fraction of sulfur element is 400 ug/g),DBT in the model oil can be almost totally removed under the conditions of m (catalyst)/m (model oil)=0.71%, V (H2O2)/V (model oil)=0.30%, reaction temperature 60 ℃ and 10 min, and converted into DBTO2. The desulfurization rate of DBT is 95.81% after the catalysts was used for eight times.

Key words: catalyst, poly ehylene oxide-propylene oxide-ethylene oxide, alumina, molybdenum oxide, dibenzothiophene, oxidative desulfurization