Abstract
Oxidative desulfurization (ODS) of benzothiophene (BT), dibenzothiophene (DBT) and 4,6-dimethyl dibenzothiophene (DMDBT) in model light oil was investigated with different oxidants over Ti-MWW catalyst. The results indicated that tert-butyl hydroperoxide (TBHP) exhibits higher reactivity with these organic sulfur-containing compounds than hydogen peroxide. In the presence of TBHP, the reactivity of these sulfur-containing compounds over Ti-MWW catalyst is in the order of DBT > DMDBT > BT, which is determined by the electron density of sulfur atom in thiophene ring as well as the steric hindrance of sulfur compounds. ODS of a commercial diesel oil was also investigated over the Ti-MWW/TBHP system. The sulfur compounds in the commercial diesel oil can be efficiently oxidized to corresponding sulfone under mild reaction conditions; by oxidation and extraction twice, the sulfur content in the commercial diesel oil is decreased from 1 015 μg/mL to 11 μg/mL and the sulfur removal reaches 99%.
| Original language | English |
|---|---|
| Pages (from-to) | 771-775 |
| Number of pages | 5 |
| Journal | Ranliao Huaxue Xuebao/Journal of Fuel Chemistry and Technology |
| Volume | 39 |
| Issue number | 10 |
| State | Published - Oct 2011 |
Keywords
- 4,6-dimethyl dibenzothiophene
- Diesel oil
- Oxidative desulfurization
- Tert-butyl hydroperoxide
- Ti-MWW
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