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Structure evolution of Co/alumina-pillared clay catalysts under thermal treatment at increasing temperatures / A. Gil in Industrial & engineering chemistry research, Vol. 47 N°19 (Octobre 2008) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 47 N°19 (Octobre 2008) . - p. 7226–7235 Titre : Structure evolution of Co/alumina-pillared clay catalysts under thermal treatment at increasing temperatures Type de document : texte imprimé Auteurs : A. Gil, Auteur ; R. Trujillano, Auteur ; M. A. Vicente, Auteur Année de publication : 2008 Article en page(s) : p. 7226–7235 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Thermal  treatment  Co/alumina-pillared  montmorillonite  catalyst  X-ray  diffraction Résumé : The aim of this work is to study the effect of the thermal treatment at 350 and 500 °C on the structure of a Co/alumina-pillared montmorillonite catalyst. For this purpose, the X-ray powder diffraction patterns of the solids, the nitrogen physisorption data at −196 °C, the micropore-size distributions, the UV−vis and NIR spectroscopies of the dried materials, the gravimetric and differential thermal analyses, and the temperature-programmed reduction analyses of the supported cobalt catalysts have been analyzed and compared. The impregnation with cobalt and the temperature has modified the textural properties of the alumina-pillared clay supports, giving rise to a loss of surface area and micropore volume in the final catalysts. Co3O4 is the only cobalt oxide species detected in all the supported catalysts. The oxidation of propene at low concentrations over selected cobalt oxide catalysts shows that the structural characteristics of the support influence on the catalytic performance. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie071320v [article] Structure evolution of Co/alumina-pillared clay catalysts under thermal treatment at increasing temperatures [texte imprimé] / A. Gil, Auteur ; R. Trujillano, Auteur ; M. A. Vicente, Auteur . - 2008 . - p. 7226–7235. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 47 N°19 (Octobre 2008) . - p. 7226–7235 Mots-clés : Thermal  treatment  Co/alumina-pillared  montmorillonite  catalyst  X-ray  diffraction Résumé : The aim of this work is to study the effect of the thermal treatment at 350 and 500 °C on the structure of a Co/alumina-pillared montmorillonite catalyst. For this purpose, the X-ray powder diffraction patterns of the solids, the nitrogen physisorption data at −196 °C, the micropore-size distributions, the UV−vis and NIR spectroscopies of the dried materials, the gravimetric and differential thermal analyses, and the temperature-programmed reduction analyses of the supported cobalt catalysts have been analyzed and compared. The impregnation with cobalt and the temperature has modified the textural properties of the alumina-pillared clay supports, giving rise to a loss of surface area and micropore volume in the final catalysts. Co3O4 is the only cobalt oxide species detected in all the supported catalysts. The oxidation of propene at low concentrations over selected cobalt oxide catalysts shows that the structural characteristics of the support influence on the catalytic performance. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie071320v