Journal
JOURNAL OF HAZARDOUS MATERIALS
Volume 279, Issue -, Pages 220-225Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jhazmat.2014.07.005
Keywords
Oxidative desulfurization; Diesel; DBT; Protic ionic liquid
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Funding
- National Natural Science Foundation of China (NSFC Grant) [21373177]
- Shandong Province Higher Educational Science and Technology Program [J11LB16]
- Research Award Fund for outstanding young scientists of Shandong Province in China [BS2010NJ017]
- SKLC cooperation project [N-08-08]
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A novel and green carboxylate-anion-based protic ionic liquid (PIL), [Hnmp]HCOO, was prepared through a simple and atom economic neutralization reaction between N-methyl-2-pyrrolidonium (NMP) and formic acids. Both FT-IR spectra and H-1 NMR confirmed its simple salt structure. [Hnmp]HCOO exhibited so high catalytic activity that the dibenzothiophene (DBT) removal reached 99% at 50 degrees C in 3 h under conditions of V-PIL/V-model (oil) = 1:10 and H2O2/DBT (O/S, molar ratio) = 5. The catalytic oxidation reactivity of S-compounds was found to be in the order of DBT>4,6-dimethyldibenzothiophene (4,6-DMDBT) > benzothiophene (BT). The investigation on mechanism showed that oxidative desulfurization was realized through dual activation of PIL. Moreover, [Hnmp]HCOO can be recycled for five times with an unnoticeable decrease in desulfurization activity. (C) 2014 Elsevier B.V. All rights reserved.
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