期刊
MOLECULAR CATALYSIS
卷 436, 期 -, 页码 53-59出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.mcat.2017.04.008
关键词
Brdnsted acidic ionic liquid; Heterogenization; Hexagonal boron nitride; Oxidative desulfurization
资金
- National Natural Science Foundation of China [21376111, 21576122, 21506083]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
- Postgraduate Innovation Project of Jiangsu Province [KYLX15_1067]
Catalytic oxidation of aromatic sulfur compounds for separation from fuel oils has turned to be an important theme in environmental protection. However, most current reports focused on metal-based catalysts, resulting in high costs and potential secondary pollution to fuel oils. In this work, three metal-free bronsted acid ionic liquids were prepared and anchored onto graphene-like hexagonal boron nitride (G-h-BN) to gain metal-free, heterogeneous catalysts. The heterogenization process not only provided convenience to recycling of the catalysts, but also supplied a sharply decreased ILs dosage. Notably, the prepared catalyst [Bmim]H2PO4/G-h-BN held the best catalytic activity, a 100% of catalytic activity can be gained in catalytic oxidation of 4,6-dimethyldibenzothiophene (4,6-DMDBT), which has been regarded as the most stubborn sulfide in industrial hydrodesulfurization (HDS). It was also found that distractors in fuels showed almost no influence on catalytic oxidation of 4,6-DMDBT. Besides, the catalytic oxidation product was also investigated to propose a possible reaction mechanism. The heterogeneous metal-free catalyst were recycled for 5 times without significant decrease in catalytic performance. (C) 2017 Elsevier B.V. All rights reserved.
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