Effect of iron incorporation on W based catalysts for oxidative desulfurization of dibenzothiophene compounds

Abstract

Abstract New WFe oxides based catalysts were prepared by successive or simultaneous impregnation method on pseudo boehmite in order to understand the role of Fe and evaluate the influence of the preparation method, W loading, and partial reduction of supported species, on the oxidative desulfurization (ODS) performance of dibenzothiophene compounds (DBTs). The catalysts were characterized by SEM-EDS, N2 physisorption, TPR, XPS and Raman spectroscopy (Operando and ex-situ conditions). According to the results, the promoting effect of Fe favors the formation of hydrated WO6 species, mainly in partially reduced samples. The increase of the catalytic activity of up to 7 times using partially reduced catalysts (compared to calcined catalysts) was attributed to the presence of hydrated WO6 species. The above performance allows to achieve ultra-low sulfur content fuels (