Abstract
The activity of Ti-pillared montmorillonite for photocatalytic oxidative desulfurization using 2,5-dimethylthiophene dissolved in n-octane as a model organosulfur compound in gasoline was investigated. Using Ti-pillared montmorillonite and an oil/acetonitrile two-phase extraction, deep desulfurization of sulfur-containing compounds was achieved. During this process, O 2 was used as the oxygen source and photoirradiation was achieved by UV light. Using this approach, 97.4% of the sulfur compounds were oxidized and successfully removed from the model gasoline system under mild reaction conditions. Montmorillonite was prepared by sol–gel method and characterized by XRD, N 2 absorption and UV–vis spectroscopy. The characterization indicates that Ti component enters the interlayer of montmorillonite, working as an active component in the crystal phase of anatase. Deep desulfurization experiments show that the activity of Ti-pillared montmorillonite is obviously better than P25.
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