Isomerization of n-butane on Pt/SO42--ZrO2 and mechanical mixtures of of Pt/Al2O3 and SO42--ZrO2

JUAN C. YORI; MIGUEL A. D'AMATO; GUILLERMO COSTA; JOSÉ M. PARERA

JOURNAL OF CATALYSIS

ACADEMIC PRESS INC ELSEVIER SCIENCE

Lugar: Amsterdam; Año: 1995 vol. 153 p. 218 - 233

0021-9517

The effect of the incorporation of a metallic phase (Pt) into a superacid catalyst (SO2−4–ZrO2) for n-butane isomerization was studied. The convenience of supporting Pt directly on the superacid or on alumina and of using the physical mixture as a catalyst was also analyzed. Pt supported on SO2−4–ZrO2 has the same activity as SO2−4–ZrO2, but the stability is increased. The bifunctional reaction mechanism is not operating because Pt does not have metallic properties due to a strong interaction with the support under the experimental conditions of reduction (573 K). When Pt is supported on Al2O3 and mixed mechanically with SO2−4–ZrO2, the activity and stability are increased due to the operation of the bifunctional mechanism.