Influence of gallium on the properties of Pt-Re/Al2O3 naphtha reforming catalysts

Maria A. Vicerich (1) , Catherine Especel (2) , Viviana M. Benitez (1) , Florence Epron (2) , Carlos L. Pieck (1)

1 INCAPE - Instituto de Investigaciones en Catálisis y Petroquímica “Ing. José Miguel Parera” [Santa Fe]
2 IC2MP [Poitiers] - Institut de chimie des milieux et matériaux de Poitiers [UMR 7285]

The influence of gal lium on the properties of Pt-Re/Al2O3 catalysts used in naphtha reforming was studied. The catalysts were prepared by the coimpregnation method. It was found that the addition of gallium to the Pt-Re/Al2O3 catalyst diminishes its acidity (Bronsted and Lewis). It also produces an inhibition of the metal function, i.e. dehydrogenation and hydrogenolysis activity. Activity tests for n-C-5 isomerization showed that gallium addition decreases the total activity of the Pt-Re catalyst but increases its selectivity to i-C-5 isomers. The selectivity to low value light gases (C-1-C-3) is particularly decreased. Catalytic tests for n-C-7 reforming showed that addition of gallium increases both catalyst stability and selectivity to aromatics, and decreases the production of light gases.

Mots clés: Pt-Re-Ga/Al2O3 catalysts; Naphtha reforming

Domaines: Catalyse

Maria A. Vicerich, Catherine Especel, Viviana M. Benitez, Florence Epron, Carlos L. Pieck. Influence of gallium on the properties of Pt-Re/Al2O3 naphtha reforming catalysts. Applied Catalysis A : General, 2011, 407 (1-2), pp.49-55. ⟨10.1016/j.apcata.2011.08.022⟩. ⟨hal-01342605⟩