Deep Oxidative Desulfurization of Fuels Catalyzed by Phosphotungstic Acid in Ionic Liquids at Room Temperature

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• 作者：Huaming Li*^† ; ^‡ ; ; Lining He^§ ; ; Jidong Lu*^† ; ; Wenshuai Zhu^‡ ; ; Xue Jiang^‡ ; ; Yan Wang^§ ; ; Yongsh
• 刊名：Energy & Fuels
• 出版年：2009
• 出版时间：March 19, 2009
• 年：2009
• 卷：23
• 期：3
• 页码：1354-1357
• 全文大小：135K
• 年卷期：v.23,no.3(March 19, 2009)
• ISSN：1520-5029

文摘

A simplified extraction and catalytic oxidative desulfurization (ECODS) system composed of phosphotungstic acid (H₃PW₁₂O₄₀·14H₂O), 30% H₂O₂, and [bmim]BF₄ was found suitable for the deep removal of sulfur in model oil. By this desulfurization system dibenzothiophene (DBT), 4,6-dimethyldibenzothiophene (4,6-DMDBT), and benzothiophene (BT) could be effectively removed. Removal of DBT could reach 98.2% at room temperature (30 °C) for 1 h, which was remarkably superior to mere solvent extraction with IL (14.2%) or catalytic oxidation without IL (15.9%). When the reaction temperature increased to 70 °C, treatment of BT, DBT, and 4,6-DMDBT with our ECODS system showed 100% removal of sulfur compounds in 3 h. This desulfurization system could be recycled five times with slight decrease in activity.