INVESTIGADORES
PADRO Cristina Liliana
artículos
Título:
Effect of Promotion with Sn on Supported Pt Catalysts for CO2 Reforming of CH4
Autor/es:
S.M STAGG, E.R. SALAZAR, C. PADRO, AND D.E. RESASCO
Revista:
JOURNAL OF CATALYSIS
Editorial:
Elsevier
Referencias:
Año: 1998 vol. 178 p. 137 - 145
ISSN:
0021-9517
Resumen:
The reforming of CH4 with CO2 (dry reforming) was studied
at 800±C over SiO2 and ZrO2 supported PtSn catalysts. Several
preparation methods were investigated. It was found that the
Pt/ZrO2 catalyst had much higher activity and stability than the
Pt/SiO2 catalyst due to the ability of the ZrO2 to promote CO22 catalyst had much higher activity and stability than the
Pt/SiO2 catalyst due to the ability of the ZrO2 to promote CO22 catalyst due to the ability of the ZrO2 to promote CO2
dissociation. On this catalyst, the decomposition of CH4 and the
dissociation of CO2 occur via two independent pathways. The longterm
activity of the catalyst is dependent upon the balance between
the rate of CH4 decomposition and the rate of cleaning of
carbonaceous deposits. The co-impregnation of Sn and Pt on the
ZrO2 results in lower activity and stability than the monometallic
catalysts. Depending on the reaction conditions, disruption of the
PtSn alloys may occur, causing deposition of tin oxide that inhibits
the role of the ZrO2. Special preparation methods can result
in the controlled placement of Sn on the Pt particle, minimizing
the promotersupport interaction. These catalysts exhibit higher
activity and stability than the monometallic catalyst under severely
deactivating conditions, 800±C, and a 3 : 1 ratio of CH4 : CO2. It is
possible to deposit Sn onto Pt/ZrO2 catalysts in a manner which
reduces carbon deposition without inhibiting the beneficial role of
the support.2 catalysts in a manner which
reduces carbon deposition without inhibiting the beneficial role of
the support.4 and the
dissociation of CO2 occur via two independent pathways. The longterm
activity of the catalyst is dependent upon the balance between
the rate of CH4 decomposition and the rate of cleaning of
carbonaceous deposits. The co-impregnation of Sn and Pt on the
ZrO2 results in lower activity and stability than the monometallic
catalysts. Depending on the reaction conditions, disruption of the
PtSn alloys may occur, causing deposition of tin oxide that inhibits
the role of the ZrO2. Special preparation methods can result
in the controlled placement of Sn on the Pt particle, minimizing
the promotersupport interaction. These catalysts exhibit higher
activity and stability than the monometallic catalyst under severely
deactivating conditions, 800±C, and a 3 : 1 ratio of CH4 : CO2. It is
possible to deposit Sn onto Pt/ZrO2 catalysts in a manner which
reduces carbon deposition without inhibiting the beneficial role of
the support.2 catalysts in a manner which
reduces carbon deposition without inhibiting the beneficial role of
the support.2 occur via two independent pathways. The longterm
activity of the catalyst is dependent upon the balance between
the rate of CH4 decomposition and the rate of cleaning of
carbonaceous deposits. The co-impregnation of Sn and Pt on the
ZrO2 results in lower activity and stability than the monometallic
catalysts. Depending on the reaction conditions, disruption of the
PtSn alloys may occur, causing deposition of tin oxide that inhibits
the role of the ZrO2. Special preparation methods can result
in the controlled placement of Sn on the Pt particle, minimizing
the promotersupport interaction. These catalysts exhibit higher
activity and stability than the monometallic catalyst under severely
deactivating conditions, 800±C, and a 3 : 1 ratio of CH4 : CO2. It is
possible to deposit Sn onto Pt/ZrO2 catalysts in a manner which
reduces carbon deposition without inhibiting the beneficial role of
the support.2 catalysts in a manner which
reduces carbon deposition without inhibiting the beneficial role of
the support.4 decomposition and the rate of cleaning of
carbonaceous deposits. The co-impregnation of Sn and Pt on the
ZrO2 results in lower activity and stability than the monometallic
catalysts. Depending on the reaction conditions, disruption of the
PtSn alloys may occur, causing deposition of tin oxide that inhibits
the role of the ZrO2. Special preparation methods can result
in the controlled placement of Sn on the Pt particle, minimizing
the promotersupport interaction. These catalysts exhibit higher
activity and stability than the monometallic catalyst under severely
deactivating conditions, 800±C, and a 3 : 1 ratio of CH4 : CO2. It is
possible to deposit Sn onto Pt/ZrO2 catalysts in a manner which
reduces carbon deposition without inhibiting the beneficial role of
the support.2 catalysts in a manner which
reduces carbon deposition without inhibiting the beneficial role of
the support.2 results in lower activity and stability than the monometallic
catalysts. Depending on the reaction conditions, disruption of the
PtSn alloys may occur, causing deposition of tin oxide that inhibits
the role of the ZrO2. Special preparation methods can result
in the controlled placement of Sn on the Pt particle, minimizing
the promotersupport interaction. These catalysts exhibit higher
activity and stability than the monometallic catalyst under severely
deactivating conditions, 800±C, and a 3 : 1 ratio of CH4 : CO2. It is
possible to deposit Sn onto Pt/ZrO2 catalysts in a manner which
reduces carbon deposition without inhibiting the beneficial role of
the support.2 catalysts in a manner which
reduces carbon deposition without inhibiting the beneficial role of
the support.2. Special preparation methods can result
in the controlled placement of Sn on the Pt particle, minimizing
the promotersupport interaction. These catalysts exhibit higher
activity and stability than the monometallic catalyst under severely
deactivating conditions, 800±C, and a 3 : 1 ratio of CH4 : CO2. It is
possible to deposit Sn onto Pt/ZrO2 catalysts in a manner which
reduces carbon deposition without inhibiting the beneficial role of
the support.2 catalysts in a manner which
reduces carbon deposition without inhibiting the beneficial role of
the support.4 with CO2 (dry reforming) was studied
at 800±C over SiO2 and ZrO2 supported PtSn catalysts. Several
preparation methods were investigated. It was found that the
Pt/ZrO2 catalyst had much higher activity and stability than the
Pt/SiO2 catalyst due to the ability of the ZrO2 to promote CO22 catalyst had much higher activity and stability than the
Pt/SiO2 catalyst due to the ability of the ZrO2 to promote CO22 catalyst due to the ability of the ZrO2 to promote CO2
dissociation. On this catalyst, the decomposition of CH4 and the
dissociation of CO2 occur via two independent pathways. The longterm
activity of the catalyst is dependent upon the balance between
the rate of CH4 decomposition and the rate of cleaning of
carbonaceous deposits. The co-impregnation of Sn and Pt on the
ZrO2 results in lower activity and stability than the monometallic
catalysts. Depending on the reaction conditions, disruption of the
PtSn alloys may occur, causing deposition of tin oxide that inhibits
the role of the ZrO2. Special preparation methods can result
in the controlled placement of Sn on the Pt particle, minimizing
the promotersupport interaction. These catalysts exhibit higher
activity and stability than the monometallic catalyst under severely
deactivating conditions, 800±C, and a 3 : 1 ratio of CH4 : CO2. It is
possible to deposit Sn onto Pt/ZrO2 catalysts in a manner which
reduces carbon deposition without inhibiting the beneficial role of
the support.2 catalysts in a manner which
reduces carbon deposition without inhibiting the beneficial role of
the support.4 and the
dissociation of CO2 occur via two independent pathways. The longterm
activity of the catalyst is dependent upon the balance between
the rate of CH4 decomposition and the rate of cleaning of
carbonaceous deposits. The co-impregnation of Sn and Pt on the
ZrO2 results in lower activity and stability than the monometallic
catalysts. Depending on the reaction conditions, disruption of the
PtSn alloys may occur, causing deposition of tin oxide that inhibits
the role of the ZrO2. Special preparation methods can result
in the controlled placement of Sn on the Pt particle, minimizing
the promotersupport interaction. These catalysts exhibit higher
activity and stability than the monometallic catalyst under severely
deactivating conditions, 800±C, and a 3 : 1 ratio of CH4 : CO2. It is
possible to deposit Sn onto Pt/ZrO2 catalysts in a manner which
reduces carbon deposition without inhibiting the beneficial role of
the support.2 catalysts in a manner which
reduces carbon deposition without inhibiting the beneficial role of
the support.2 occur via two independent pathways. The longterm
activity of the catalyst is dependent upon the balance between
the rate of CH4 decomposition and the rate of cleaning of
carbonaceous deposits. The co-impregnation of Sn and Pt on the
ZrO2 results in lower activity and stability than the monometallic
catalysts. Depending on the reaction conditions, disruption of the
PtSn alloys may occur, causing deposition of tin oxide that inhibits
the role of the ZrO2. Special preparation methods can result
in the controlled placement of Sn on the Pt particle, minimizing
the promotersupport interaction. These catalysts exhibit higher
activity and stability than the monometallic catalyst under severely
deactivating conditions, 800±C, and a 3 : 1 ratio of CH4 : CO2. It is
possible to deposit Sn onto Pt/ZrO2 catalysts in a manner which
reduces carbon deposition without inhibiting the beneficial role of
the support.2 catalysts in a manner which
reduces carbon deposition without inhibiting the beneficial role of
the support.4 decomposition and the rate of cleaning of
carbonaceous deposits. The co-impregnation of Sn and Pt on the
ZrO2 results in lower activity and stability than the monometallic
catalysts. Depending on the reaction conditions, disruption of the
PtSn alloys may occur, causing deposition of tin oxide that inhibits
the role of the ZrO2. Special preparation methods can result
in the controlled placement of Sn on the Pt particle, minimizing
the promotersupport interaction. These catalysts exhibit higher
activity and stability than the monometallic catalyst under severely
deactivating conditions, 800±C, and a 3 : 1 ratio of CH4 : CO2. It is
possible to deposit Sn onto Pt/ZrO2 catalysts in a manner which
reduces carbon deposition without inhibiting the beneficial role of
the support.2 catalysts in a manner which
reduces carbon deposition without inhibiting the beneficial role of
the support.2 results in lower activity and stability than the monometallic
catalysts. Depending on the reaction conditions, disruption of the
PtSn alloys may occur, causing deposition of tin oxide that inhibits
the role of the ZrO2. Special preparation methods can result
in the controlled placement of Sn on the Pt particle, minimizing
the promotersupport interaction. These catalysts exhibit higher
activity and stability than the monometallic catalyst under severely
deactivating conditions, 800±C, and a 3 : 1 ratio of CH4 : CO2. It is
possible to deposit Sn onto Pt/ZrO2 catalysts in a manner which
reduces carbon deposition without inhibiting the beneficial role of
the support.2 catalysts in a manner which
reduces carbon deposition without inhibiting the beneficial role of
the support.2. Special preparation methods can result
in the controlled placement of Sn on the Pt particle, minimizing
the promotersupport interaction. These catalysts exhibit higher
activity and stability than the monometallic catalyst under severely
deactivating conditions, 800±C, and a 3 : 1 ratio of CH4 : CO2. It is
possible to deposit Sn onto Pt/ZrO2 catalysts in a manner which
reduces carbon deposition without inhibiting the beneficial role of
the support.2 catalysts in a manner which
reduces carbon deposition without inhibiting the beneficial role of
the support.±C over SiO2 and ZrO2 supported PtSn catalysts. Several
preparation methods were investigated. It was found that the
Pt/ZrO2 catalyst had much higher activity and stability than the
Pt/SiO2 catalyst due to the ability of the ZrO2 to promote CO22 catalyst had much higher activity and stability than the
Pt/SiO2 catalyst due to the ability of the ZrO2 to promote CO22 catalyst due to the ability of the ZrO2 to promote CO2
dissociation. On this catalyst, the decomposition of CH4 and the
dissociation of CO2 occur via two independent pathways. The longterm
activity of the catalyst is dependent upon the balance between
the rate of CH4 decomposition and the rate of cleaning of
carbonaceous deposits. The co-impregnation of Sn and Pt on the
ZrO2 results in lower activity and stability than the monometallic
catalysts. Depending on the reaction conditions, disruption of the
PtSn alloys may occur, causing deposition of tin oxide that inhibits
the role of the ZrO2. Special preparation methods can result
in the controlled placement of Sn on the Pt particle, minimizing
the promotersupport interaction. These catalysts exhibit higher
activity and stability than the monometallic catalyst under severely
deactivating conditions, 800±C, and a 3 : 1 ratio of CH4 : CO2. It is
possible to deposit Sn onto Pt/ZrO2 catalysts in a manner which
reduces carbon deposition without inhibiting the beneficial role of
the support.2 catalysts in a manner which
reduces carbon deposition without inhibiting the beneficial role of
the support.4 and the
dissociation of CO2 occur via two independent pathways. The longterm
activity of the catalyst is dependent upon the balance between
the rate of CH4 decomposition and the rate of cleaning of
carbonaceous deposits. The co-impregnation of Sn and Pt on the
ZrO2 results in lower activity and stability than the monometallic
catalysts. Depending on the reaction conditions, disruption of the
PtSn alloys may occur, causing deposition of tin oxide that inhibits
the role of the ZrO2. Special preparation methods can result
in the controlled placement of Sn on the Pt particle, minimizing
the promotersupport interaction. These catalysts exhibit higher
activity and stability than the monometallic catalyst under severely
deactivating conditions, 800±C, and a 3 : 1 ratio of CH4 : CO2. It is
possible to deposit Sn onto Pt/ZrO2 catalysts in a manner which
reduces carbon deposition without inhibiting the beneficial role of
the support.2 catalysts in a manner which
reduces carbon deposition without inhibiting the beneficial role of
the support.2 occur via two independent pathways. The longterm
activity of the catalyst is dependent upon the balance between
the rate of CH4 decomposition and the rate of cleaning of
carbonaceous deposits. The co-impregnation of Sn and Pt on the
ZrO2 results in lower activity and stability than the monometallic
catalysts. Depending on the reaction conditions, disruption of the
PtSn alloys may occur, causing deposition of tin oxide that inhibits
the role of the ZrO2. Special preparation methods can result
in the controlled placement of Sn on the Pt particle, minimizing
the promotersupport interaction. These catalysts exhibit higher
activity and stability than the monometallic catalyst under severely
deactivating conditions, 800±C, and a 3 : 1 ratio of CH4 : CO2. It is
possible to deposit Sn onto Pt/ZrO2 catalysts in a manner which
reduces carbon deposition without inhibiting the beneficial role of
the support.2 catalysts in a manner which
reduces carbon deposition without inhibiting the beneficial role of
the support.4 decomposition and the rate of cleaning of
carbonaceous deposits. The co-impregnation of Sn and Pt on the
ZrO2 results in lower activity and stability than the monometallic
catalysts. Depending on the reaction conditions, disruption of the
PtSn alloys may occur, causing deposition of tin oxide that inhibits
the role of the ZrO2. Special preparation methods can result
in the controlled placement of Sn on the Pt particle, minimizing
the promotersupport interaction. These catalysts exhibit higher
activity and stability than the monometallic catalyst under severely
deactivating conditions, 800±C, and a 3 : 1 ratio of CH4 : CO2. It is
possible to deposit Sn onto Pt/ZrO2 catalysts in a manner which
reduces carbon deposition without inhibiting the beneficial role of
the support.2 catalysts in a manner which
reduces carbon deposition without inhibiting the beneficial role of
the support.2 results in lower activity and stability than the monometallic
catalysts. Depending on the reaction conditions, disruption of the
PtSn alloys may occur, causing deposition of tin oxide that inhibits
the role of the ZrO2. Special preparation methods can result
in the controlled placement of Sn on the Pt particle, minimizing
the promotersupport interaction. These catalysts exhibit higher
activity and stability than the monometallic catalyst under severely
deactivating conditions, 800±C, and a 3 : 1 ratio of CH4 : CO2. It is
possible to deposit Sn onto Pt/ZrO2 catalysts in a manner which
reduces carbon deposition without inhibiting the beneficial role of
the support.2 catalysts in a manner which
reduces carbon deposition without inhibiting the beneficial role of
the support.2. Special preparation methods can result
in the controlled placement of Sn on the Pt particle, minimizing
the promotersupport interaction. These catalysts exhibit higher
activity and stability than the monometallic catalyst under severely
deactivating conditions, 800±C, and a 3 : 1 ratio of CH4 : CO2. It is
possible to deposit Sn onto Pt/ZrO2 catalysts in a manner which
reduces carbon deposition without inhibiting the beneficial role of
the support.2 catalysts in a manner which
reduces carbon deposition without inhibiting the beneficial role of
the support.±C, and a 3 : 1 ratio of CH4 : CO2. It is
possible to deposit Sn onto Pt/ZrO2 catalysts in a manner which
reduces carbon deposition without inhibiting the beneficial role of
the support.2 catalysts in a manner which
reduces carbon deposition without inhibiting the beneficial role of
the support.