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

• 来源期刊: 石油科学（英文版）
• 年，卷（期）: 2018,（4）
• 页码范围: 882-889
• 页数: 8页
• 语种: 英文

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 N2 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.