4,6-Dimethyl-dibenzothiophene conversion over Al2O3-TiO2-supported noble metal catalysts

▶ Al2O3 and Al2O3-TiO2 (molar ratio Al/Ti = 2, AT2) mixed oxides were pore-filling impregnated to obtain Pd, Pt and Pd-Pt catalysts with ∼1 wt% nominal metal loading. ▶ Reduced catalysts were tested in the 4,6-dimethyl-dibenzothiophene hydrodesulfurization (HDS). ▶ In Pd-containing materials, TiO2 incorporation into the alumina support was favorable to the catalytic activity of noble metal catalysts. ▶ Enhanced intrinsic activity (per exposed metallic site) was obtained in Pt-containing catalysts supported on the AT2 mixed oxide. ▶ Yield to different products over various catalysts seemed to be strongly influenced by metallic particles dispersion.