Extractive and Catalytic Oxidative Desulfurization of Gasoline by Methyltrioxorhenium in Ionic Liquids

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• 作者：Mingdong Zhou ; Wenye Meng ; Yang Li ; Qiang Wang ; Xuebing Li ; Shuliang Zang
• 刊名：Energy & Fuels
• 出版年：2014
• 出版时间：January 16, 2014
• 年：2014
• 卷：28
• 期：1
• 页码：516-521
• 全文大小：287K
• ISSN：1520-5029

文摘

For the first time, methyltrioxorhenium (MTO) is used as a catalyst for the extractive and catalytic oxidative desulfurization (ECODS) of model oil and fluid catalytic cracking (FCC) gasoline, with 30% H₂O₂ as the oxidant and ionic liquids as the solvent and extractant for the removal of organic sulfur at moderate temperatures (below 60 掳C). The ECODS is highly efficient with low catalyst loading (1鈥? mol %). The mono- and bisperoxorhenium compounds formed via the reactions of MTO and H₂O₂ are proven to be catalytic active species for the oxidation of organic sulfides, such as thioethers, thiophene, and alkyl thiophenes contained in the FCC gasoline. After the oxidation, the oxidized products were easily extracted into the ionic liquid phase from the oil phase. The sulfur removal can reach up to 99% for the model oil (with an initial sulfur content of 200 渭g/mL) and 91% of the Fushun FCC gasoline (with an initial sulfur content of ca. 142 渭g/mL) within 2 h under the optimized conditions. The octane number of the gasoline is reduced by only about 0.7, without significant changes in hydrocarbon group composition after desulfurization.