Heterogeneous oxidative desulfurization of diesel fuel catalyzed by mesoporous polyoxometallate-based polymeric hybrid

Huawei Yang; Bin Jiang; Yongli Sun; Luhong Zhang; Zhaohe Huang; Zhaoning Sun; Na Yang

doi:10.1016/j.jhazmat.2017.03.017

Heterogeneous oxidative desulfurization of diesel fuel catalyzed by mesoporous polyoxometallate-based polymeric hybrid

J Hazard Mater. 2017 Jul 5:333:63-72. doi: 10.1016/j.jhazmat.2017.03.017. Epub 2017 Mar 10.

Authors

Huawei Yang¹, Bin Jiang¹, Yongli Sun¹, Luhong Zhang¹, Zhaohe Huang¹, Zhaoning Sun¹, Na Yang²

Affiliations

¹ School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, People's Republic of China.
² School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, People's Republic of China. Electronic address: yangnayna@tju.edu.cn.

PMID: 28342356
DOI: 10.1016/j.jhazmat.2017.03.017

Abstract

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 mesoporous 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 H₂W₁₂O₄₂^10- 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, 30wt%) 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.

Keywords: H(2)W(12)O(42)(10−); Oxidative desulfurization; Poly (ionic liquid); Polyoxometallates.