Abstract
A series of vanadium catalysts were synthesized and employed in pyridinium phosphate [HPy][H2PO4] with various oxidants for extractive catalytic oxidesulfurization (ECODS) of diesel. The VO(acac)2 showed high catalytic activity with HNO3/H2SO4 and ionic liquid via microwave radiations in the MECODS of diesel. The sulfur removal could reach 98.9% in 210 s at 500 W, which was superior to that of the simple ECODS (89.3%) under optimal conditions (Vdiesel = 20 mL, VIL/Vdiesel volume ratio = 0.075, m(VO(acaca)2)/mdiesel = 0.5 wt%, V(HNO3)/V(H2SO4) = 1 and T = 80 °C). The catalytic system could be regenerated six times without significant loss of activity.
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