INVESTIGADORES
MAZZIERI Vanina Alejandra
artículos
Título:
Role of Sn in PtReSn/Al2O3Cl catalysts for naphtha reforming
Autor/es:
VANINA A. MAZZIERI, JAVIER M. GRAU, CARLOS R. VERA, JUAN C. YORI,JOSE´ M. PARERA, CARLOS L. PIECK
Revista:
CATALYSIS TODAY
Editorial:
Baltzer Science Publishers
Referencias:
Lugar: Post bus 221, 1400 AE Bussum, the Netherlands; Año: 2005 vol. 107 p. 643 - 650
ISSN:
0920-5861
Resumen:
The influence of Sn addition on the catalytic activity of PtRe/Al2O3 naphtha reforming catalysts was studied. Trimetallic PtReSn
catalysts supported on chlorided alumina were prepared by coimpregnation. The content of Re and Pt was 0.3%, while the Sn load was varied
between 0.0 and 0.9% (weight basis). In order to make a comparison, Pt/Al2O3 and PtRe/Al2O3 catalysts were also prepared. The acid
function of the catalysts was studied by means of temperature programmed desorption of pyridine and the reaction test of n-pentane
isomerization. Temperature programmed reduction and cyclohexane dehydrogenation were used to characterize the activity of the metal
function. n-C7 dehydrocyclization was used as a test of the combined action of the acid and metal function. It was found that Sn decreases the
amount of strong acid sites of chlorided alumina producing catalysts with lower cracking activity. In the case of the trimetallic PtReSn
catalyst, Sn addition to PtRe decreases the hydrogenolytic activity and increases both the isomerization activity and the stability. 2O3 naphtha reforming catalysts was studied. Trimetallic PtReSn
catalysts supported on chlorided alumina were prepared by coimpregnation. The content of Re and Pt was 0.3%, while the Sn load was varied
between 0.0 and 0.9% (weight basis). In order to make a comparison, Pt/Al2O3 and PtRe/Al2O3 catalysts were also prepared. The acid
function of the catalysts was studied by means of temperature programmed desorption of pyridine and the reaction test of n-pentane
isomerization. Temperature programmed reduction and cyclohexane dehydrogenation were used to characterize the activity of the metal
function. n-C7 dehydrocyclization was used as a test of the combined action of the acid and metal function. It was found that Sn decreases the
amount of strong acid sites of chlorided alumina producing catalysts with lower cracking activity. In the case of the trimetallic PtReSn
catalyst, Sn addition to PtRe decreases the hydrogenolytic activity and increases both the isomerization activity and the stability. 2O3 and PtRe/Al2O3 catalysts were also prepared. The acid
function of the catalysts was studied by means of temperature programmed desorption of pyridine and the reaction test of n-pentane
isomerization. Temperature programmed reduction and cyclohexane dehydrogenation were used to characterize the activity of the metal
function. n-C7 dehydrocyclization was used as a test of the combined action of the acid and metal function. It was found that Sn decreases the
amount of strong acid sites of chlorided alumina producing catalysts with lower cracking activity. In the case of the trimetallic PtReSn
catalyst, Sn addition to PtRe decreases the hydrogenolytic activity and increases both the isomerization activity and the stability. n-pentane
isomerization. Temperature programmed reduction and cyclohexane dehydrogenation were used to characterize the activity of the metal
function. n-C7 dehydrocyclization was used as a test of the combined action of the acid and metal function. It was found that Sn decreases the
amount of strong acid sites of chlorided alumina producing catalysts with lower cracking activity. In the case of the trimetallic PtReSn
catalyst, Sn addition to PtRe decreases the hydrogenolytic activity and increases both the isomerization activity and the stability. n-C7 dehydrocyclization was used as a test of the combined action of the acid and metal function. It was found that Sn decreases the
amount of strong acid sites of chlorided alumina producing catalysts with lower cracking activity. In the case of the trimetallic PtReSn
catalyst, Sn addition to PtRe decreases the hydrogenolytic activity and increases both the isomerization activity and the stability.