Ultra-deep and fast oxidative desulfurization by IL-POM immobilized on bar-shaped green fiber toward the high efficiency

The Keggin-type P-Mo-W polyoxometalate-based ionic liquids ([VimAm]Br-POM, POM is PMo 6 W 6 O 40 ) were facilely supported on the green fiber (CA) to obtain a kind of bar-shaped catalyst. The [VimAm]Br-POM@CA showed an outstanding oxidative desulfurization performance for model oil and real oils with H 2 O 2 as oxidant, mainly due to the dual role of the [VimAm]Br-POM with the high activity and its excellent dispersion on CA. The dibenzothiophene (DBT) in model oil could be almost completely removed with [VimAm]Br-POM@CA-2 in 60 min at 60 °C without adding other extractants, in which [VimAm]Br acts as this role. Meanwhile, the influences of reaction temperature, molar ratio of H 2 O 2 /S, catalyst dosage, and different sulfur-containing compounds were also investigated. Interestingly, the pretty low activation energy (0.1875 kJ/mol) has been achieved, and no significant loss of activity even after being reused for 5 cycles. The combination of IL-POM and CA is an efficient strategy to obtain a newly kind desulfurization catalyst, with remarkable results on catalytic efficiency and reuse ability at the same time.