Designed formation of mesoscopical order of ionic liquid-based meso/macroporous Mo/TiO2 materials for high-performance oxidative desulfurization

In Situ Implanting of Single Tungsten Sites into Defective UiO‐66(Zr) by Solvent‐Free Route for Efficient Oxidative Desulfurization at Room Temperature

“…Based on the temperature-dependent results,t he activation energy (Ea) of W/UiO-66(Zr)-0.12 was calculated to be 32.4 kJ mol À1 ,w hich is low compared with the data from the previous reports (Figure S32, Table S6). [11,17] TheW /UiO-66(Zr)-0.12 catalyst also shows good reusability.A lmost no visible efficiency decrease after four cycles was noticed (Figure 3e insert and S33. Thes tructural stability of W/ UiO-66(Zr)-0.12 after reuse was confirmed by XRD and N 2 sorption technique (Figure S34 and S35).…”

“…DFT calculation was conducted to better understand the role of the implantation of Wsingle sites in [4,11,48,50] To confirm the above hypothesis,l eaching and quenching experiments were carried out. When W/UiO-66(Zr)-0.12 was filtered out of the reaction system at ar eaction time 5min, the catalytic activity was almost completely inhibited, and confirmed that no leaching had occurred and that no plentiful radicals had been produced (Figure 4b).…”

“…[3][4][5][6] To date,considerable research has been devoted to prepare efficient ODS catalysts for obtaining clean fuel, however most of them needed high reaction temperature to meet efficient activity. [7][8][9] Several works have focused on the fabrication of ODS catalyst based on ionic liquid, [10,11] metalorganic frameworks (MOFs), [12,13] polyoxometalates, [4,14] metal oxide [3,15] or metal cluster [16] for removing sulfur compounds at low temperature.U nfortunately,t he unevenly dispersed large pieces of active species easily block the pore of supports thus preventing contact with reactant or can only remove dibenzothiophene (DBT), which limit their ODS performance. [17,18] Fort his,t he development of highly active ODS catalysts with rich porosity and atomic scale active sites at ambient temperature has been strongly pursued.…”

Heteropolyacids supported on hierarchically macro/mesoporous TiO2: efficient catalyst for deep oxidative desulfurization of fuel

“…Hierarchically ordered macro/mesoporous materials have been widely studied in the field of heterogeneous catalysis [14], which can facilitate the mass transfer of bulk substrates and products in the heterogeneous catalytic systems [15,16]. Huang et al [17] exhibited that hierarchically macro/ mesoporous Co-Mo-Ni/γ-Al 2 O 3 catalyst possessed better catalytic activity for the hydrodesulfurization of thiophene than mesoporous Co-Mo-Ni/γ-Al 2 O 3 .…”

Efficient and reusable ordered mesoporous WOx/SnO2 catalyst for oxidative desulfurization of dibenzothiophene

“…8,23,24 Caero et al examined the ODS of a real diesel fuel on V 2 O 5 supported on alumina, silica, niobia, ceria, and titania, and reported that an approximately 99% decrease in the initial amount of sulfur. 25 Prasad et al reported that MoO 3 /Al 2 O 3 -SiO 2 catalyst had the best catalytic performance for ODS of 4,6-dimethyldibenzothiphene (4,6-DMDBT) with tertbutyl hydroperoxide. 26 A novel composite catalyst V o -MoO 2 /NC exhibited excellent ODS activity and reusability, which was ascribed essentially to the strong electron-donating effect of NC on V o -MoO 2 .…”