Construction of amphiphilic and polyoxometalate poly(ionic liquids) for enhanced oxidative desulfurization in fuel

• Published in: Journal of molecular liquids 2023-06, Vol.379, p.121650, Article 121650
• Main Authors: Chen, Hanxiang, Hou, Shuting, Cui, Haoyuan, Wang, Chao, Zhang, Ming, Li, Hongping, Xu, Hui, Wu, Jiqing, Zhu, Wenshuai
• Format: Article
• Language: English
• Subjects: Hydrogen peroxide; Oxidative desulfurization; Poly(ionic liquids); Polyoxometalates
• ISSN: 0167-7322; 1873-3166
• DOI: 10.1016/j.molliq.2023.121650

•POM-based PILs with high specific surface area were successfully prepared with template-free strategy.•Deep oxidative desulfurization and recycling ability can be achieved without any extractant.•The structure–activity relationship was investigated through various technologies.•DFT calculations were employed to investigate the interaction nature between catalysts and sulfides. Interfacial properties of catalysts and distribution of active sites affect the catalytic oxidative desulfurization activity, which has become the research focus in recent years. Towards desulfurization in fuel, a kind of amphiphilic and polyoxometalate poly(ionic liquids) was prepared by the cross-linking copolymerization and ion exchange reaction. The resulting samples characterized in detail were employed in the oxidation of refractory aromatic sulfur-containing compounds. With H2O2 as the oxidant, the sample p-C2VIM-DVB-2-PMo exhibited enhanced desulfurization performance and good thermal stability, meeting the demand of deep desulfurization. Besides, no significant decrease on sulfur removal was observed after recycling for 8 times. Moreover, density functional theory calculations were employed to investigate the adsorption strength and interaction nature between the cation and typical sulfide.