Catalytic behaviour of V-Sb-Ti mixed oxides in the vapour-phase reaction of ethylbenzene with air

The objective of this work is to study the behaviour of V-Sb-Ti mixed oxides in the ODH of ethylbenzene and to compare these results with those previously reported for the partial oxidation of toluene with the same catalysts. The solids, with nominal compositions VSbO4, VSb 0.8Ti0.2O4 and V0.8SbTi 0...

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Detalles Bibliográficos
Publicado:	2005
Materias:	Ethylbenzene ODH Toluene Vanadium antimonate Benzene Dehydrogenation Oxidation Styrene Vanadium
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09205861_v107-108_n_p444_Larrondo http://hdl.handle.net/20.500.12110/paper_09205861_v107-108_n_p444_Larrondo
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_09205861_v107-108_n_p444_Larrondo
record_format	dspace
spelling	paper:paper_09205861_v107-108_n_p444_Larrondo2023-06-08T15:50:11Z Catalytic behaviour of V-Sb-Ti mixed oxides in the vapour-phase reaction of ethylbenzene with air Ethylbenzene ODH Toluene Vanadium antimonate Benzene Dehydrogenation Oxidation Styrene Toluene Ethylbenzene ODH Vanadium antimonate Vanadium The objective of this work is to study the behaviour of V-Sb-Ti mixed oxides in the ODH of ethylbenzene and to compare these results with those previously reported for the partial oxidation of toluene with the same catalysts. The solids, with nominal compositions VSbO4, VSb 0.8Ti0.2O4 and V0.8SbTi 0.2O4, were prepared by solid-state reaction. Catalytic tests were carried out in a fixed-bed reactor using ethylbenzene and air as reactants. A relation between the dehydrogenation function of the solids and their Sb/V surface ratios was established. The higher Sb/V surface ratio the higher selectivity to styrene but pointing out the participation of Sb sites in the H-abstraction step. Comparison between toluene and ethylbenzene oxidation results has confirmed that the reaction rate is independent of the hydrocarbon used in the feed and controlled by the reoxidation of the catalyst. Besides, at the same conversion level, selectivity to total oxidation products is lower when ethylbenzene is used as reactant, due to the formation of a stable dehydrogenated product, styrene, which competes with oxygen for the chemisorption on Lewis acid sites. © 2005 Elsevier B.V. All rights reserved. 2005 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09205861_v107-108_n_p444_Larrondo http://hdl.handle.net/20.500.12110/paper_09205861_v107-108_n_p444_Larrondo
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Ethylbenzene ODH Toluene Vanadium antimonate Benzene Dehydrogenation Oxidation Styrene Toluene Ethylbenzene ODH Vanadium antimonate Vanadium
spellingShingle	Ethylbenzene ODH Toluene Vanadium antimonate Benzene Dehydrogenation Oxidation Styrene Toluene Ethylbenzene ODH Vanadium antimonate Vanadium Catalytic behaviour of V-Sb-Ti mixed oxides in the vapour-phase reaction of ethylbenzene with air
topic_facet	Ethylbenzene ODH Toluene Vanadium antimonate Benzene Dehydrogenation Oxidation Styrene Toluene Ethylbenzene ODH Vanadium antimonate Vanadium
description	The objective of this work is to study the behaviour of V-Sb-Ti mixed oxides in the ODH of ethylbenzene and to compare these results with those previously reported for the partial oxidation of toluene with the same catalysts. The solids, with nominal compositions VSbO4, VSb 0.8Ti0.2O4 and V0.8SbTi 0.2O4, were prepared by solid-state reaction. Catalytic tests were carried out in a fixed-bed reactor using ethylbenzene and air as reactants. A relation between the dehydrogenation function of the solids and their Sb/V surface ratios was established. The higher Sb/V surface ratio the higher selectivity to styrene but pointing out the participation of Sb sites in the H-abstraction step. Comparison between toluene and ethylbenzene oxidation results has confirmed that the reaction rate is independent of the hydrocarbon used in the feed and controlled by the reoxidation of the catalyst. Besides, at the same conversion level, selectivity to total oxidation products is lower when ethylbenzene is used as reactant, due to the formation of a stable dehydrogenated product, styrene, which competes with oxygen for the chemisorption on Lewis acid sites. © 2005 Elsevier B.V. All rights reserved.
title	Catalytic behaviour of V-Sb-Ti mixed oxides in the vapour-phase reaction of ethylbenzene with air
title_short	Catalytic behaviour of V-Sb-Ti mixed oxides in the vapour-phase reaction of ethylbenzene with air
title_full	Catalytic behaviour of V-Sb-Ti mixed oxides in the vapour-phase reaction of ethylbenzene with air
title_fullStr	Catalytic behaviour of V-Sb-Ti mixed oxides in the vapour-phase reaction of ethylbenzene with air
title_full_unstemmed	Catalytic behaviour of V-Sb-Ti mixed oxides in the vapour-phase reaction of ethylbenzene with air
title_sort	catalytic behaviour of v-sb-ti mixed oxides in the vapour-phase reaction of ethylbenzene with air
publishDate	2005
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09205861_v107-108_n_p444_Larrondo http://hdl.handle.net/20.500.12110/paper_09205861_v107-108_n_p444_Larrondo
_version_	1768542322162663424

Catalytic behaviour of V-Sb-Ti mixed oxides in the vapour-phase reaction of ethylbenzene with air

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