INVESTIGADORES
YORI Juan Carlos
artículos
Título:
Catalytic activity of Pt-Re-Pb/Al2O3 naphtha reforming catalysts
Autor/es:
MARÍA AMPARO SÁNCHEZ; VANINA A. MAZZIERI; JAVIER M. GRAU; JUAN C. YORI; CARLOS L. PIECK
Revista:
Journal of Chemical Technology and Bioechnology
Editorial:
John Wiley & Sons Ltd.
Referencias:
Lugar: New York; Año: 2011 vol. 86 p. 1198 - 1204
ISSN:
1097-4660
Resumen:
1198
Abstract
BACKGROUND: The main purpose of the naphtha reforming process is to obtain high octane naphtha, aromatic compounds
and hydrogen. The catalysts are bifunctional in nature, having both acid and metal sites. The metal function is supplied by
metal particles (Pt with other promoters like Re, Ge, Sn, etc.) deposited on the support. The influence of the addition of Pb to
Pt-Re/Al2O3 naphtha reforming catalysts was studied in this work. The catalysts were prepared by co-impregnation and they
were characterized bymeans of temperature programmed reduction, thermal programmed desorption of pyridine and several
test reactions such as cyclohexane dehydrogenation, cyclopentane hydrogenolysis and n-heptane reforming.
RESULTS: It was found that Pb interacts strongly with the (Pt-Re) active phase producing decay in the metal function activity.
Hydrogenolysis is more affected than dehydrogenation. Part of the Pb is deposited over the support decreasing the acidity and
the strength of the most acidic sites.
CONCLUSION: The n-heptane reforming reaction shows that Pb modifies the stability and selectivity of the Pt-Re catalysts.
Small Pb additions increase the stability and greatly improve the selectivity to C7 isomers and aromatics while they decrease
the formation of low value products such as methane and gases.
the formation of low value products such as methane and gases.
the formation of low value products such as methane and gases.
were characterized bymeans of temperature programmed reduction, thermal programmed desorption of pyridine and several
test reactions such as cyclohexane dehydrogenation, cyclopentane hydrogenolysis and n-heptane reforming.
RESULTS: It was found that Pb interacts strongly with the (Pt-Re) active phase producing decay in the metal function activity.
Hydrogenolysis is more affected than dehydrogenation. Part of the Pb is deposited over the support decreasing the acidity and
the strength of the most acidic sites.
CONCLUSION: The n-heptane reforming reaction shows that Pb modifies the stability and selectivity of the Pt-Re catalysts.
Small Pb additions increase the stability and greatly improve the selectivity to C7 isomers and aromatics while they decrease
the formation of low value products such as methane and gases.
the formation of low value products such as methane and gases.
the formation of low value products such as methane and gases.
were characterized bymeans of temperature programmed reduction, thermal programmed desorption of pyridine and several
test reactions such as cyclohexane dehydrogenation, cyclopentane hydrogenolysis and n-heptane reforming.
RESULTS: It was found that Pb interacts strongly with the (Pt-Re) active phase producing decay in the metal function activity.
Hydrogenolysis is more affected than dehydrogenation. Part of the Pb is deposited over the support decreasing the acidity and
the strength of the most acidic sites.
CONCLUSION: The n-heptane reforming reaction shows that Pb modifies the stability and selectivity of the Pt-Re catalysts.
Small Pb additions increase the stability and greatly improve the selectivity to C7 isomers and aromatics while they decrease
the formation of low value products such as methane and gases.
the formation of low value products such as methane and gases.
the formation of low value products such as methane and gases.
2O3 naphtha reforming catalysts was studied in this work. The catalysts were prepared by co-impregnation and they
were characterized bymeans of temperature programmed reduction, thermal programmed desorption of pyridine and several
test reactions such as cyclohexane dehydrogenation, cyclopentane hydrogenolysis and n-heptane reforming.
RESULTS: It was found that Pb interacts strongly with the (Pt-Re) active phase producing decay in the metal function activity.
Hydrogenolysis is more affected than dehydrogenation. Part of the Pb is deposited over the support decreasing the acidity and
the strength of the most acidic sites.
CONCLUSION: The n-heptane reforming reaction shows that Pb modifies the stability and selectivity of the Pt-Re catalysts.
Small Pb additions increase the stability and greatly improve the selectivity to C7 isomers and aromatics while they decrease
the formation of low value products such as methane and gases.
the formation of low value products such as methane and gases.
the formation of low value products such as methane and gases.
7 isomers and aromatics while they decrease
the formation of low value products such as methane and gases.