This review deals with the notable results obtained by the synergy between ionic liquids(ILs) and WO3 in the field of pollutant gas sensing and sulfur removal pretreatment of fuels. Startingfrom the known characteristics of tungsten trioxide as catalytic material, many authors have proposedthe use of ionic liquids in order to both direct WO3 production towards controllable nanostructures(nanorods, nanospheres, etc.) and to modify the metal oxide structure (incorporating ILs) in orderto increase the gas adsorption ability and, thus, the catalytic eciency. Moreover, ionic liquids areable to highly disperse WO3 in composites, thus enhancing the contact surface and the catalyticability of WO3 in both hydrodesulfurization (HDS) and oxidative desulfurization (ODS) of liquidfuels. In particular, the use of ILs in composite synthesis can direct the hydrogenation process (HDS)towards sulfur compounds rather than towards olefins, thus preserving the octane number of the fuelwhile highly reducing the sulfur content and, thus, the possibility of air pollution with sulfur oxides.A similar performance enhancement was obtained in ODS, where the high dispersion of WO3 (due tothe use of ILs during the synthesis) allows for noteworthy results at very low temperatures (50 C).
|Numero di pagine||21|
|Stato di pubblicazione||Published - 2020|
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