期刊
SEPARATION SCIENCE AND TECHNOLOGY
卷 44, 期 4, 页码 971-982出版社
TAYLOR & FRANCIS INC
DOI: 10.1080/01496390802691232
关键词
Desulfurization; diesel; extraction; ionic liquid; lewis-acidic
资金
- National High Technology Research and Development Program of China [2006AA02Z209]
- State Major Basic Research Development Program of China [2006CB202507]
Ionic liquids were found to be highly selective for the extractive removal of aromatic sulfur compounds from fuels at room temperature. The efficiency of ionic liquids for the removal of aromatic sulfur compounds is dependent on the properties and structure of the ionic liquids. In this work, the Lewis-acidic ionic liquid 1-butyl-3-methylimidazolium tetrahalogenoferrate(III) ([BMIM] [FeCl4]) was synthesized and demonstrated to be more effective for the removal of aromatic sulfur compounds from diesel over ionic liquids 1-butyl-3-methylimidazolium hexafluorophosphate ([BMIM][PF6]) and 1-butyl-3-methylimidazolium tetrafluoroborate ([BMIM] [BF4]) because of its Lewis-acidic property. The ionic liquids favorably extracted organic compounds with a higher density of aromatic -electrons. [BMIM][FeCl4] ionic liquid can be regenerated through reextraction by hexane, and could be used in multiple steps for the removal of sulfur compounds from diesel.
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