Polyoxometalate-based silica-supported ionic liquids for heterogeneous oxidative desulfurization in fuels  

作　　者：Ming Zhang Miao Wang Jiapeng Yang Hongping Li Jiaqi Liu Xiao Chen Wenshuai Zhu Huaming Li 

机构地区：[1]Institute for Energy Research,Jiangsu University [2]School of Energy and Power Engineering,Jiangsu University [3]School of Chemistry and Chemical Engineering,Jiangsu University

出　　处：《Petroleum Science》2018年第4期882-889,共8页石油科学（英文版）

基　　金：financially supported by the National Nature Science Foundation of China (Nos. 21776116, 21576122, 21722604);Postdoctoral Foundation of China (No. 2017M621646);Postdoctoral Foundation of Jiangsu Province (No. 2018K083C);the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)

摘　　要：With the aim of deep desulfurization, silica-supported polyoxometalate-based ionic liquids were successfully prepared by a one-pot hydrothermal process and employed in heterogeneous oxidative desulfurization of various sulfur compounds. The compositions and structures of the hybrid samples were characterized by various methods such as FT-IR, XPS, Raman,UV–Vis, wide-angle XRD and N2adsorption–desorption. The experimental results indicated that the hybrid materials presented a high dispersion of tungsten species and excellent catalytic activity for the removal of 4,6-dimethyldibenzothiophene without any organic solvent as extractant, and the sulfur removal could reach 100.0% under mild conditions.The catalytic performance on various substrates was also investigated in detail. After cycling seven cycles, the sulfur removal of the heterogeneous system still reached 93.0%. The GC-MS analysis results demonstrated that the sulfur compound was first adsorbed by the catalyst and subsequently oxidized to its corresponding sulfone.With the aim of deep desulfurization, silica-supported polyoxometalate-based ionic liquids were successfully prepared by a one-pot hydrothermal process and employed in heterogeneous oxidative desulfurization of various sulfur compounds. The compositions and structures of the hybrid samples were characterized by various methods such as FT-IR, XPS, Raman,UV–Vis, wide-angle XRD and N_2 adsorption–desorption. The experimental results indicated that the hybrid materials presented a high dispersion of tungsten species and excellent catalytic activity for the removal of 4,6-dimethyldibenzothiophene without any organic solvent as extractant, and the sulfur removal could reach 100.0% under mild conditions.The catalytic performance on various substrates was also investigated in detail. After cycling seven cycles, the sulfur removal of the heterogeneous system still reached 93.0%. The GC-MS analysis results demonstrated that the sulfur compound was first adsorbed by the catalyst and subsequently oxidized to its corresponding sulfone.

关 键 词：POLYOXOMETALATE Silica-supported ionic liquid Heterogeneous oxidative desulfurization 

分 类 号：TE[石油与天然气工程]