Catalytic and physicochemical properties of aluminoplatinum catalysts modified with indium and gallium

Transformation of n-hexane on Al2O3and SiO2supported Pt, Pt+Ga and Ir+Pt+Ga catalysts prepared by anchoring methods

“…The addition of 2 wt.% Ga increased the activity and stability of 0.5 wt.% Pt/Al 2 O 3 catalyst in the dehydrogenation of n-dodecane [17]. This effect of gallium was attributed to an increase in the amount of strongly bound hydrogen [17]. The effect of 0.3-0.5 wt.% Ga on 0.5 wt.% Pt/Al 2 O 3 catalyst was to increase the conversion and decrease the aromatic yield and catalyst lifetime in n-heptane dehydrocyclization [18].…”

“…For instance, the elucidation of the state and the effect of gallium in naphtha reforming or dehydrogenation catalysts require further investigation. The addition of gallium was shown to change both hydrogen chemisorption and catalytic properties of Pt/SiO 2 [14] and Pt/Al 2 O 3 [15][16][17] catalysts. Gallium increased the dispersion and decreased the activity of platinum in the dehydrogenation of cyclohexane due to the formation of PtGa 2 alloy [14].…”

“…The presence of 0.25 wt.% Ga in 0.25 wt.% Pt/Al 2 O 3 catalyst resulted in an enhanced hydrogenolysis, isomerization and aromatization selectivity in nhexane conversion [15]. The addition of 2 wt.% Ga increased the activity and stability of 0.5 wt.% Pt/Al 2 O 3 catalyst in the dehydrogenation of n-dodecane [17]. This effect of gallium was attributed to an increase in the amount of strongly bound hydrogen [17].…”