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

Highly HYD Selective Pd–Pt/support Hydrotreating Catalysts for the High Pressure Desulfurization of DBT Type Molecules

“…Recent studies show that Pd-Pt supported catalysts possess high activity in the HDS of DBT [9][10][11][12][13] and, in addition, they exhibit better selectivity to HYD than conventional sulfided CoMo and NiMo catalysts [10,11]. Indeed, Kabe et al [10] studied the HDS of DBT over highly loaded Pd-Pt/c-Al 2 O 3 catalysts which displayed high HDS activity and almost complete conversion via HYD.…”

“…Niquille-Röthlisberger and Prins [11] tested Pd-Pt/cAl 2 O 3 in the HDS of DBT and reported 30% selectivity to HYD. Many other studies have shown that the hydrogenating capacity and thiotolerance of Pd-Pt catalysts allow them to perform the HDS of 4,6-dimethyl-DBT (4,6-DMDBT) via HYD [9][10][11][12]. In spite of this, even over Pd-Pt neither preferential DBT desulfurization via HYD has been achieved nor has HYD been effectively controlled only by ''soft'' changes in the nature of the carrier.…”

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.…”

Preparation of Highly Active Alumina-Pillared Clay Montmorillonite-Supported Platinum Catalyst for Hydrodesulfurization

“…Thus, both Pt particle and Brønsted acid sites in Pt/Al-PILM catalyst would act as active sites for the HDS reaction. Generally, acidity of support enhances the sulfur tolerance property of noble metal catalyst, which caused by electron deficiency [12,23,24]. Accordingly, Brønsted acid sites of Al-PILM act as active sites for HDS reaction and improve the sulfur tolerance of Pt particle in Pt/Al-PILM catalyst.…”

“…On the other hand, noble metal catalysts show high HDS and hydrogenation activities for the production of sulfur free diesel fuel containing lower aromatic compounds. Thus, noble metal catalysts have been much attention as new HDS catalysts [7][8][9][10][11][12].…”