Journal
JOURNAL OF HAZARDOUS MATERIALS
Volume 333, Issue -, Pages 63-72Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jhazmat.2017.03.017
Keywords
Poly (ionic liquid); Polyoxometallates; Oxidative desulfurization; H2W12O4210-
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Funding
- National Key R&D Program of China [2016YFC0400406]
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In this work, the simple preparation of novel polymer supported polyoxometallates (POMs) catalysts has been reported. Soluble task-specific cross-linked poly (ionic liquid) (PIL) was prepared with N, N-dimethyl-dodecyl-(4-vinylbenzyl) ammonium chloride and divinylbenzene as co-monomers. The as-prepared cationic PILs were assembled with different commercial POMs to form the interlinked meso-porous catalysts, and the formation mechanism was provided. The catalytic oxidation activities of the catalysts were closely related to the formation pathway of their corresponding peroxide active species. The catalyst with H2W12O4210- as counterion, which exhibited the best activity in the oxidation of benzothiophene (BT) and dibenzothiophene (DBT) to sulfones in model oil with hydrogen peroxide (H2O2, 30 wt%) as oxidant, was characterized by different techniques and systematically studied for its sulfur removal performance. As for the oxidative desulfurization of a real diesel, it was observed that almost all of the original sulfur compounds could be completely converted, and the catalyst could be reused for at least eight cycles without noticeable changes in both catalytic activity and chemical structure. In the end, a catalytic mechanism was put forward with the assistant of Raman analysis. (C) 2017 Elsevier B.V. All rights reserved.
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