Oxidative desulfurization of model diesel using [(C₄H₉)₄N]₆Mo₇O₂₄ as a catalyst in ionic liquids

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• 作者：Hongying L眉 ; Changliang Deng ; Wangzhong Ren ; Xin Yang
• 关键词：Ionic liquid ; Oxidative desulfurization ; Dibenzothiophene ; Polyoxometalate
• 刊名：Fuel Processing Technology
• 出版年：March, 2014
• 年：2014
• 卷：119
• 期：Complete
• 页码：87-91
• 全文大小：484 K

文摘

An extraction and catalytic oxidation desulfurization (ECODS) system, composed of an Anderson-type catalyst [(C₄H₉)₄N]₆Mo₇O₂₄, model diesel, 30% H₂O₂ and 1-butyl-3-methylimidazolium hexafluorophosphate ([bmim]PF₆), was conducted under mild conditions. The sulfur-containing compounds, such as benzothiophene (BT), dibenzothiophene (DBT), 4-methyldibenzothiophene (4-MDBT) and 4,6-dimethyldibenzothiophene (4,6-DMDBT), were extracted into ionic liquid (IL) from the model oil and oxidized to corresponding sulfones using H₂O₂ as oxidant in the presence of the [(C₄H₉)₄N]₆Mo₇O₂₄. In the case of ECODS, the sulfur removal of DBT can reach 99.0%, which was superior to that of the simple extraction with IL or the chemical oxidation. The amounts of ILs and oxidant dosage play vital roles in ECODS. The reactivity of sulfur-containing compounds in the ECODS was followed: DBT > 4-MDBT > 4,6-DMDBT > BT. This ECODS system could be recycled six times without a significant decrease in activity.