New hydrodesulfurization catalysts: noble metals supported on USY zeolite

Hydrodesulfurization of 4,6-dimethyldibenzothiophene over Pt, Pd, and Pt–Pd catalysts supported on amorphous silica–alumina

“…This demonstrates the occurrence of a chemical synergism and the presence of active sites of a new type (with different electronic and/or geometrical characteristics) due to the alloying of Pd with Pt. Synergetic effects were also observed in the HDS of thiophene [35], DBT [32], 4-E-6-M-DBT [8,9,29], and a straight-run gasoil [26,29,36]. The combination of Pd and Pt also greatly accelerated the hydrogenation of small aromatic hydrocarbons in the presence of sulfur-containing compounds [36][37][38][39].…”

Effect of catalyst precursor and its pretreatment on the amount of β-Pd hydride phase and HDS activity of Pd-Pt/silica-alumina

“…Parallel to this research, some studies have also been devoted to their evaluation in hydrodesulfurization (HDS) reactions of simple model compounds such as thiophene or dibenzothiophene [7,8] and for the deep HDS of substituted dibenzothiophenes [4,8,9]. This is because these catalysts show high HYD activity which allows via HYD route the easier transformation of refractory sulfur molecules.…”

HDS, HDN and HDO of FCC gasoline spiked with benzothiophene over PtPd/H-USY

“…Noble metal based catalysts were used effectively for the HDS of hydrocarbon fractions, primarily of gas oils [24][25][26]. In our previous R&D work we attempted to enlarge the applicability of supported noble metal catalysts.…”