Artículo
Oxidation of o-xylene to phthalic anhydride on Sb-V/ZrO2 catalysts
Fecha de publicación:
07/2003
Editorial:
Springer
Revista:
Catalysis Letters
ISSN:
1011-372X
e-ISSN:
1572-879X
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Zirconia-supported and bulk-mixed vanadium-antimonium catalysts were used for the oxidation of o-xylene to phthalic anhydride. Vanadium promoted the transition of tetragonal to monoclinic zirconia. The simultaneous presence of antimony and vanadium on zirconia at low coverage led to a preferential interaction of individual V and Sb oxides with the zirconia surface rather than the formation of a binary Sb-V oxide, while at higher Sb-V contents, the formation of SbVO4 took place. Sb-V-ZrO2 catalysts showed high activity for o-xylene conversion and better selectivity to phthalic anhydride as compared to V/ZrO2 catalysts. However, their selectivity to phthalic anhydride was poor compared to V/TiO2 commercial catalysts. The improved selectivity of the Sb-containing catalysts was attributed to the blocking of non-effective surface sites of ZrO2, the decrease of the total amount of acid sites and the formation of surface V-O-Sb-O-V structures.
Palabras clave:
O-Xylene Oxidation
,
Phthalic Anhydride
,
Sb-V/Zro2 Catalysts
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Identificadores
Colecciones
Articulos(INCAPE)
Articulos de INST.DE INVEST.EN CATALISIS Y PETROQUIMICA "ING. JOSE MIGUEL PARERA"
Articulos de INST.DE INVEST.EN CATALISIS Y PETROQUIMICA "ING. JOSE MIGUEL PARERA"
Citación
Pieck, Carlos Luis; del Val, S.; López Granados, M.; Bañares, M.A.; Fierro, J.L.G.; Oxidation of o-xylene to phthalic anhydride on Sb-V/ZrO2 catalysts; Springer; Catalysis Letters; 89; 1-2; 7-2003; 27-34
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