Selective ring opening of decalin with Pt–Ir/Al2O3 catalyst prepared by catalytic reduction

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Selective ring opening of decalin with Pt–Ir/Al2O3 catalyst prepared by catalytic reduction

Silvana A. D’Ippolito (a), Viviana M. Benitez (a), Patricio Reyes (b), María C. Rangel (c) and Carlos L. Pieck (a)

pieck@fiq.unl.edu.ar

a Instituto de Investigaciones en Catálisis y Petroquímica (INCAPE) (FIQ-UNL, CONICET), Santiago del Estero 2654, 3000 Santa Fe, Argentina

b Facultad de Ciencias Químicas, Universidad de Concepción, Casilla 3-C, Concepción, Chile

c GECCAT, Instituto de Química, Universidade Federal da Bahia, Rua Barao de Geremoabo, s/n, Campus Universitário de Ondina, Federaçao, 40170-290 Salvador, Bahia, Brazil

Abstract

Reports a study of the reaction of selective ring opening using alumina supported Pt–Ir catalysts with and without Mg addition.

Catalysts were prepared by the method of catalytic reduction, having 1 wt% of Pt whereas the Ir content varied in the range 0.1–0.6 wt%. Electron diffraction shows that the method of preparation leads to catalysts with strong interaction between Pt and Ir being observed the presence of a solid phase of Pt–Ir. In catalysts without Mg no changes in the hydrogenolysis activity was observed as the Ir content increases. However, a decrease both in acidity and dehydrogenating activity was observed. In the Mg containing catalysts, the addition of Ir increases the acidity, the dehydrogenating and hydrogenolytic activity. Determined that for the isomerization reaction of n-pentane the addition of Ir improves the stability of the catalysts and formation of isomers of C5 in both series of catalysts (with and without Mg).

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