Artículo
Characterization and performance for propane oxidative dehydrogenation of Li-modified MoO3/Al2O3 catalysts
Abello, Maria Cristina
; Gomez, Manuel Francisco
; Casella, Mónica Laura
; Ferretti, Osmar Alberto
; Bañares, Miguel Ángel; García Fierro, José Luis
Fecha de publicación:
09/2003
Editorial:
Elsevier Science
Revista:
Applied Catalysis A: General
ISSN:
0926-860X
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Oxidative dehydrogenation of propane has been studied on Mo/γ-Al 2O3 catalysts with 13wt.% of MoO3 and promoted with Li. The changes induced on catalysts when the support is doped with different amounts of Li (from 0.3 to 1.2wt.%) have been studied by BET, AAS, XRD, SEM-EDAX, TPR, DRS, XPS, Raman spectroscopy and isopropanol decomposition. The characterization of the samples showed important changes in: texture, Mo supported structure, acid-base properties and reducibility. The Li replaces Brønsted acid sites and decreases the strength of the terminal Mo=O bond. The change in the strength of the terminal Mo=O bond does not correlate with the decrease in Mo species reducibility or with the decrease in propane conversion. This behavior suggests that the terminal Mo=O bond is not the active sites for ODH of propane. The selectivity to propene increases at lower conversion whereas at higher values it leveled off around 25%.
Palabras clave:
Li-Doped Mo/Γ-Al2o3 Catalysts
,
Propane Oxidative Dehydrogenation
,
Raman
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Articulos(CINDECA)
Articulos de CENTRO DE INV EN CS.APLICADAS "DR.JORGE J.RONCO"
Articulos de CENTRO DE INV EN CS.APLICADAS "DR.JORGE J.RONCO"
Articulos(INTEQUI)
Articulos de INST. DE INVEST. EN TECNOLOGIA QUIMICA
Articulos de INST. DE INVEST. EN TECNOLOGIA QUIMICA
Citación
Abello, Maria Cristina; Gomez, Manuel Francisco; Casella, Mónica Laura; Ferretti, Osmar Alberto; Bañares, Miguel Ángel; et al.; Characterization and performance for propane oxidative dehydrogenation of Li-modified MoO3/Al2O3 catalysts; Elsevier Science; Applied Catalysis A: General; 251; 2; 9-2003; 435-447
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