INVESTIGADORES
DE MIGUEL sergio Ruben
artículos
Título:
Behavior of bimetallic PtSn/Al2O3 catalysts prepared by controlled surface reactions in the selective dehydrogenation of butane
Autor/es:
SONIA A. BOCANEGRA, SERGIO R. DE MIGUEL, IRINA BORBATH, JOZSEF L. MARGITFALVI, OSVALDO A. SCELZA
Revista:
JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL
Editorial:
Elsevier
Referencias:
Lugar: Amsterdam; Año: 2009 vol. 301 p. 52 - 60
ISSN:
1381-1169
Resumen:
The ?one-pot? circulation reactor system was used for the modification of Pt/Al2O3 catalyst using Controlled
Surface Reactions (CSRs) with the involvement of tetraethyltin. At 40 ◦C the tin anchoring reaction
resulted in exclusive formation of alloy type Pt?Sn/Al2O3 catalyst, while at higher temperatures tin was
also introduced onto the alumina support. The bimetallic catalysts were characterized by Temperature
Programmed Reduction (TPR), H2 and CO chemisorption, XPS and test reactions of the metallic phase
(cyclohexane dehydrogenation and cyclopentane hydrogenolysis). It has been demonstrated that the
decomposition of surface organometallic species of Sn in the presence of oxygen leads to the formation
of Lewis-acid type active sites in the close vicinity of platinum. The formation Sn?Pt alloy phase together
with oxidized Sn species has been evidenced by methods of characterization applied. The presence of
these species in Pt?Sn/Al2O3 catalysts favors the catalytic behavior in n-butane dehydrogenation, thus
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
(cyclohexane dehydrogenation and cyclopentane hydrogenolysis). It has been demonstrated that the
decomposition of surface organometallic species of Sn in the presence of oxygen leads to the formation
of Lewis-acid type active sites in the close vicinity of platinum. The formation Sn?Pt alloy phase together
with oxidized Sn species has been evidenced by methods of characterization applied. The presence of
these species in Pt?Sn/Al2O3 catalysts favors the catalytic behavior in n-butane dehydrogenation, thus
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
(cyclohexane dehydrogenation and cyclopentane hydrogenolysis). It has been demonstrated that the
decomposition of surface organometallic species of Sn in the presence of oxygen leads to the formation
of Lewis-acid type active sites in the close vicinity of platinum. The formation Sn?Pt alloy phase together
with oxidized Sn species has been evidenced by methods of characterization applied. The presence of
these species in Pt?Sn/Al2O3 catalysts favors the catalytic behavior in n-butane dehydrogenation, thus
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
also introduced onto the alumina support. The bimetallic catalysts were characterized by Temperature
Programmed Reduction (TPR), H2 and CO chemisorption, XPS and test reactions of the metallic phase
(cyclohexane dehydrogenation and cyclopentane hydrogenolysis). It has been demonstrated that the
decomposition of surface organometallic species of Sn in the presence of oxygen leads to the formation
of Lewis-acid type active sites in the close vicinity of platinum. The formation Sn?Pt alloy phase together
with oxidized Sn species has been evidenced by methods of characterization applied. The presence of
these species in Pt?Sn/Al2O3 catalysts favors the catalytic behavior in n-butane dehydrogenation, thus
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
(cyclohexane dehydrogenation and cyclopentane hydrogenolysis). It has been demonstrated that the
decomposition of surface organometallic species of Sn in the presence of oxygen leads to the formation
of Lewis-acid type active sites in the close vicinity of platinum. The formation Sn?Pt alloy phase together
with oxidized Sn species has been evidenced by methods of characterization applied. The presence of
these species in Pt?Sn/Al2O3 catalysts favors the catalytic behavior in n-butane dehydrogenation, thus
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
(cyclohexane dehydrogenation and cyclopentane hydrogenolysis). It has been demonstrated that the
decomposition of surface organometallic species of Sn in the presence of oxygen leads to the formation
of Lewis-acid type active sites in the close vicinity of platinum. The formation Sn?Pt alloy phase together
with oxidized Sn species has been evidenced by methods of characterization applied. The presence of
these species in Pt?Sn/Al2O3 catalysts favors the catalytic behavior in n-butane dehydrogenation, thus
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
resulted in exclusive formation of alloy type Pt?Sn/Al2O3 catalyst, while at higher temperatures tin was
also introduced onto the alumina support. The bimetallic catalysts were characterized by Temperature
Programmed Reduction (TPR), H2 and CO chemisorption, XPS and test reactions of the metallic phase
(cyclohexane dehydrogenation and cyclopentane hydrogenolysis). It has been demonstrated that the
decomposition of surface organometallic species of Sn in the presence of oxygen leads to the formation
of Lewis-acid type active sites in the close vicinity of platinum. The formation Sn?Pt alloy phase together
with oxidized Sn species has been evidenced by methods of characterization applied. The presence of
these species in Pt?Sn/Al2O3 catalysts favors the catalytic behavior in n-butane dehydrogenation, thus
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
(cyclohexane dehydrogenation and cyclopentane hydrogenolysis). It has been demonstrated that the
decomposition of surface organometallic species of Sn in the presence of oxygen leads to the formation
of Lewis-acid type active sites in the close vicinity of platinum. The formation Sn?Pt alloy phase together
with oxidized Sn species has been evidenced by methods of characterization applied. The presence of
these species in Pt?Sn/Al2O3 catalysts favors the catalytic behavior in n-butane dehydrogenation, thus
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
(cyclohexane dehydrogenation and cyclopentane hydrogenolysis). It has been demonstrated that the
decomposition of surface organometallic species of Sn in the presence of oxygen leads to the formation
of Lewis-acid type active sites in the close vicinity of platinum. The formation Sn?Pt alloy phase together
with oxidized Sn species has been evidenced by methods of characterization applied. The presence of
these species in Pt?Sn/Al2O3 catalysts favors the catalytic behavior in n-butane dehydrogenation, thus
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
also introduced onto the alumina support. The bimetallic catalysts were characterized by Temperature
Programmed Reduction (TPR), H2 and CO chemisorption, XPS and test reactions of the metallic phase
(cyclohexane dehydrogenation and cyclopentane hydrogenolysis). It has been demonstrated that the
decomposition of surface organometallic species of Sn in the presence of oxygen leads to the formation
of Lewis-acid type active sites in the close vicinity of platinum. The formation Sn?Pt alloy phase together
with oxidized Sn species has been evidenced by methods of characterization applied. The presence of
these species in Pt?Sn/Al2O3 catalysts favors the catalytic behavior in n-butane dehydrogenation, thus
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
(cyclohexane dehydrogenation and cyclopentane hydrogenolysis). It has been demonstrated that the
decomposition of surface organometallic species of Sn in the presence of oxygen leads to the formation
of Lewis-acid type active sites in the close vicinity of platinum. The formation Sn?Pt alloy phase together
with oxidized Sn species has been evidenced by methods of characterization applied. The presence of
these species in Pt?Sn/Al2O3 catalysts favors the catalytic behavior in n-butane dehydrogenation, thus
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
(cyclohexane dehydrogenation and cyclopentane hydrogenolysis). It has been demonstrated that the
decomposition of surface organometallic species of Sn in the presence of oxygen leads to the formation
of Lewis-acid type active sites in the close vicinity of platinum. The formation Sn?Pt alloy phase together
with oxidized Sn species has been evidenced by methods of characterization applied. The presence of
these species in Pt?Sn/Al2O3 catalysts favors the catalytic behavior in n-butane dehydrogenation, thus
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
Surface Reactions (CSRs) with the involvement of tetraethyltin. At 40 ◦C the tin anchoring reaction
resulted in exclusive formation of alloy type Pt?Sn/Al2O3 catalyst, while at higher temperatures tin was
also introduced onto the alumina support. The bimetallic catalysts were characterized by Temperature
Programmed Reduction (TPR), H2 and CO chemisorption, XPS and test reactions of the metallic phase
(cyclohexane dehydrogenation and cyclopentane hydrogenolysis). It has been demonstrated that the
decomposition of surface organometallic species of Sn in the presence of oxygen leads to the formation
of Lewis-acid type active sites in the close vicinity of platinum. The formation Sn?Pt alloy phase together
with oxidized Sn species has been evidenced by methods of characterization applied. The presence of
these species in Pt?Sn/Al2O3 catalysts favors the catalytic behavior in n-butane dehydrogenation, thus
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
(cyclohexane dehydrogenation and cyclopentane hydrogenolysis). It has been demonstrated that the
decomposition of surface organometallic species of Sn in the presence of oxygen leads to the formation
of Lewis-acid type active sites in the close vicinity of platinum. The formation Sn?Pt alloy phase together
with oxidized Sn species has been evidenced by methods of characterization applied. The presence of
these species in Pt?Sn/Al2O3 catalysts favors the catalytic behavior in n-butane dehydrogenation, thus
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
(cyclohexane dehydrogenation and cyclopentane hydrogenolysis). It has been demonstrated that the
decomposition of surface organometallic species of Sn in the presence of oxygen leads to the formation
of Lewis-acid type active sites in the close vicinity of platinum. The formation Sn?Pt alloy phase together
with oxidized Sn species has been evidenced by methods of characterization applied. The presence of
these species in Pt?Sn/Al2O3 catalysts favors the catalytic behavior in n-butane dehydrogenation, thus
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
also introduced onto the alumina support. The bimetallic catalysts were characterized by Temperature
Programmed Reduction (TPR), H2 and CO chemisorption, XPS and test reactions of the metallic phase
(cyclohexane dehydrogenation and cyclopentane hydrogenolysis). It has been demonstrated that the
decomposition of surface organometallic species of Sn in the presence of oxygen leads to the formation
of Lewis-acid type active sites in the close vicinity of platinum. The formation Sn?Pt alloy phase together
with oxidized Sn species has been evidenced by methods of characterization applied. The presence of
these species in Pt?Sn/Al2O3 catalysts favors the catalytic behavior in n-butane dehydrogenation, thus
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
(cyclohexane dehydrogenation and cyclopentane hydrogenolysis). It has been demonstrated that the
decomposition of surface organometallic species of Sn in the presence of oxygen leads to the formation
of Lewis-acid type active sites in the close vicinity of platinum. The formation Sn?Pt alloy phase together
with oxidized Sn species has been evidenced by methods of characterization applied. The presence of
these species in Pt?Sn/Al2O3 catalysts favors the catalytic behavior in n-butane dehydrogenation, thus
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
(cyclohexane dehydrogenation and cyclopentane hydrogenolysis). It has been demonstrated that the
decomposition of surface organometallic species of Sn in the presence of oxygen leads to the formation
of Lewis-acid type active sites in the close vicinity of platinum. The formation Sn?Pt alloy phase together
with oxidized Sn species has been evidenced by methods of characterization applied. The presence of
these species in Pt?Sn/Al2O3 catalysts favors the catalytic behavior in n-butane dehydrogenation, thus
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
resulted in exclusive formation of alloy type Pt?Sn/Al2O3 catalyst, while at higher temperatures tin was
also introduced onto the alumina support. The bimetallic catalysts were characterized by Temperature
Programmed Reduction (TPR), H2 and CO chemisorption, XPS and test reactions of the metallic phase
(cyclohexane dehydrogenation and cyclopentane hydrogenolysis). It has been demonstrated that the
decomposition of surface organometallic species of Sn in the presence of oxygen leads to the formation
of Lewis-acid type active sites in the close vicinity of platinum. The formation Sn?Pt alloy phase together
with oxidized Sn species has been evidenced by methods of characterization applied. The presence of
these species in Pt?Sn/Al2O3 catalysts favors the catalytic behavior in n-butane dehydrogenation, thus
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
(cyclohexane dehydrogenation and cyclopentane hydrogenolysis). It has been demonstrated that the
decomposition of surface organometallic species of Sn in the presence of oxygen leads to the formation
of Lewis-acid type active sites in the close vicinity of platinum. The formation Sn?Pt alloy phase together
with oxidized Sn species has been evidenced by methods of characterization applied. The presence of
these species in Pt?Sn/Al2O3 catalysts favors the catalytic behavior in n-butane dehydrogenation, thus
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
(cyclohexane dehydrogenation and cyclopentane hydrogenolysis). It has been demonstrated that the
decomposition of surface organometallic species of Sn in the presence of oxygen leads to the formation
of Lewis-acid type active sites in the close vicinity of platinum. The formation Sn?Pt alloy phase together
with oxidized Sn species has been evidenced by methods of characterization applied. The presence of
these species in Pt?Sn/Al2O3 catalysts favors the catalytic behavior in n-butane dehydrogenation, thus
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
also introduced onto the alumina support. The bimetallic catalysts were characterized by Temperature
Programmed Reduction (TPR), H2 and CO chemisorption, XPS and test reactions of the metallic phase
(cyclohexane dehydrogenation and cyclopentane hydrogenolysis). It has been demonstrated that the
decomposition of surface organometallic species of Sn in the presence of oxygen leads to the formation
of Lewis-acid type active sites in the close vicinity of platinum. The formation Sn?Pt alloy phase together
with oxidized Sn species has been evidenced by methods of characterization applied. The presence of
these species in Pt?Sn/Al2O3 catalysts favors the catalytic behavior in n-butane dehydrogenation, thus
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
(cyclohexane dehydrogenation and cyclopentane hydrogenolysis). It has been demonstrated that the
decomposition of surface organometallic species of Sn in the presence of oxygen leads to the formation
of Lewis-acid type active sites in the close vicinity of platinum. The formation Sn?Pt alloy phase together
with oxidized Sn species has been evidenced by methods of characterization applied. The presence of
these species in Pt?Sn/Al2O3 catalysts favors the catalytic behavior in n-butane dehydrogenation, thus
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
(cyclohexane dehydrogenation and cyclopentane hydrogenolysis). It has been demonstrated that the
decomposition of surface organometallic species of Sn in the presence of oxygen leads to the formation
of Lewis-acid type active sites in the close vicinity of platinum. The formation Sn?Pt alloy phase together
with oxidized Sn species has been evidenced by methods of characterization applied. The presence of
these species in Pt?Sn/Al2O3 catalysts favors the catalytic behavior in n-butane dehydrogenation, thus
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.
increasing the n-butane conversion and the selectivity to olefins, and decreasing the coke deposition.