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  • Title: Oxidative Desulfurization of Fuels Using Ionic Liquids: A Review.
    Author: Zhao H, Baker GA.
    Journal: Front Chem Sci Eng; 2015 Sep; 9(3):262-279. PubMed ID: 33907629.
    Abstract:
    Extractive oxidation, wherein aromatic sulfur compounds are extracted and subsequently oxidized to their corresponding sulfones, has proven to be one of the most effective desulfurization methods for producing ultra-low sulfur content fuels. As non-volatile and highly designable solvents, ionic liquids (ILs) have attracted considerable attention for the oxidative desulfurization of fuels. In this review, we systematically discuss the utility of ILs in catalytic extractive oxidation, including their roles as extractants, catalysts, or dual extracting/catalytic species for this application. We also discuss the challenges facing the use of ILs in this regard, including their relatively high costs and excessive viscosities, as well as the efficiencies and stabilities of catalysts presently being considered within them.
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