“Preparación y caracterización de catalizadores multimetálicos de reformado de naftas. Influencia del In en las propiedades catalíticas.”

V.M. BENÍTEZ; J.C. YORI; C.L. PIECK; C.R. VERA; J.M. GRAU

XX Simposio Ibero Americano de Catalisis

Simposio; XX Simposio Ibero Americano de Catalisis; 2006

Sociedad Brasilera de Catálisis

The influence of In addition on the properties of Pt-Re-Ge/Al2O3 and Pt-Re-Sn/Al2O3 catalysts was assessed. The metal function of the catalysts was characterized by means of temperature programmed reduction, CO chemisorption and cyclopentane hydrogenolysis. The acid function was evaluated by temperature programmed desorption of pyridine (total acidity) and 2,4,6 trimethylpyridine (Brönsted acidity) and n-pentane isomerization. It was found that In addition decreases the activity of the metal function. Monometallic In/Al2O3 did not chemisorb CO at the conditions used in the test and neither did the In doped Pt-Re-Ge/Al2O3 and Pt-Re-Sn/Al2O3 catalysts. Also a marked decreased of the hydrogenolytic occurred upon In addition. With respect to the acid function, In addition producee a decrease of both Brönsted and Lewis acid sites, an effect that is reflected by a lowering of the catalytic activity for the conversion of n-pentane. 2O3 and Pt-Re-Sn/Al2O3 catalysts was assessed. The metal function of the catalysts was characterized by means of temperature programmed reduction, CO chemisorption and cyclopentane hydrogenolysis. The acid function was evaluated by temperature programmed desorption of pyridine (total acidity) and 2,4,6 trimethylpyridine (Brönsted acidity) and n-pentane isomerization. It was found that In addition decreases the activity of the metal function. Monometallic In/Al2O3 did not chemisorb CO at the conditions used in the test and neither did the In doped Pt-Re-Ge/Al2O3 and Pt-Re-Sn/Al2O3 catalysts. Also a marked decreased of the hydrogenolytic occurred upon In addition. With respect to the acid function, In addition producee a decrease of both Brönsted and Lewis acid sites, an effect that is reflected by a lowering of the catalytic activity for the conversion of n-pentane.