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Influence of the support on MnOx metallic monoliths for the combustion of volatile organic compounds / Aguero, Fabiola N. in Industrial & engineering chemistry research, Vol. 49 N° 4 (Fevrier 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 4 (Fevrier 2010) . - pp 1663–1668 Titre : Influence of the support on MnOx metallic monoliths for the combustion of volatile organic compounds Type de document : texte imprimé Auteurs : Aguero, Fabiola N., Auteur ; Barbero, Bibiana P., Auteur ; Sanz, Oihane, Auteur Année de publication : 2010 Article en page(s) : pp 1663–1668 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : MnOx  metallic  Monoliths  Organic  compounds. Résumé : The influence of the alumina layer nature which acts as the support on the preparation of structured catalysts and on the catalytic performance in VOC combustion was studied. Anodized aluminum and a ferritic alloy covered with colloidal alumina (Nyacol) and θ−δ-Al2O3 were the materials used to prepare the monolith catalysts. The impregnation was performed in one and two stages using two different concentrations of manganese acetate solutions. The catalytic properties of these catalysts were evaluated in ethanol, ethyl acetate, and toluene combustion. The most active catalysts in the combustion of the three molecules were those prepared using a θ−δ-Al2O3 as a support. The low activity of aluminum monoliths anodized with H2SO4 is due to the presence of SO42− ions which act as catalyst poison. The anodization with H2C2O4 is a preferable method to prepare MnOx monolithic catalysts. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901567a [article] Influence of the support on MnOx metallic monoliths for the combustion of volatile organic compounds [texte imprimé] / Aguero, Fabiola N., Auteur ; Barbero, Bibiana P., Auteur ; Sanz, Oihane, Auteur . - 2010 . - pp 1663–1668. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 4 (Fevrier 2010) . - pp 1663–1668 Mots-clés : MnOx  metallic  Monoliths  Organic  compounds. Résumé : The influence of the alumina layer nature which acts as the support on the preparation of structured catalysts and on the catalytic performance in VOC combustion was studied. Anodized aluminum and a ferritic alloy covered with colloidal alumina (Nyacol) and θ−δ-Al2O3 were the materials used to prepare the monolith catalysts. The impregnation was performed in one and two stages using two different concentrations of manganese acetate solutions. The catalytic properties of these catalysts were evaluated in ethanol, ethyl acetate, and toluene combustion. The most active catalysts in the combustion of the three molecules were those prepared using a θ−δ-Al2O3 as a support. The low activity of aluminum monoliths anodized with H2SO4 is due to the presence of SO42− ions which act as catalyst poison. The anodization with H2C2O4 is a preferable method to prepare MnOx monolithic catalysts. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901567a

Mixed platinum-manganese oxide catalysts for combustion of volatile organic compounds / Aguero, Fabiola N. in Industrial & engineering chemistry research, Vol. 48 N° 6 (Mars 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N° 6 (Mars 2009) . - pp. 2795–2800 Titre : Mixed platinum-manganese oxide catalysts for combustion of volatile organic compounds Type de document : texte imprimé Auteurs : Aguero, Fabiola N., Auteur ; Barbero, Bibiana P., Auteur ; Manuel Fernando R. Pereira, Auteur Année de publication : 2009 Article en page(s) : pp. 2795–2800 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Mixed  platinum-manganese  oxide  catalysts  Chloroplatinic  acid  solution  Ethanol  combustion  Toluene  combustion Résumé : Mixed platinum−manganese oxide catalysts were prepared by impregnation of supported manganese oxide catalysts with a chloroplatinic acid solution. Supported manganese oxide catalysts used as bare catalysts were prepared from different manganese precursors (nitrate and acetate) and with two manganese loadings. Supported pure platinum catalysts were also prepared as a reference. The catalytic activity was evaluated in ethanol and toluene combustion. Considering the catalysts from the different manganese precursors separately, the catalytic activity increased with increasing platinum dispersion. The platinum dispersion was affected by the presence of basic sites on the surface. Furthermore, at least two different platinum active sites were found to exist on the surface. The sites corresponding to a direct platinum−Al2O3 interaction were more active than those corresponding to a platinum−manganese oxide interaction. Finally, the catalytic tests in the combustion of an ethanol−toluene mixture demonstrated that manganese plays a beneficial role in avoiding the inhibition of toluene combustion that is observed on pure platinum catalysts. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie801310t [article] Mixed platinum-manganese oxide catalysts for combustion of volatile organic compounds [texte imprimé] / Aguero, Fabiola N., Auteur ; Barbero, Bibiana P., Auteur ; Manuel Fernando R. Pereira, Auteur . - 2009 . - pp. 2795–2800. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 6 (Mars 2009) . - pp. 2795–2800 Mots-clés : Mixed  platinum-manganese  oxide  catalysts  Chloroplatinic  acid  solution  Ethanol  combustion  Toluene  combustion Résumé : Mixed platinum−manganese oxide catalysts were prepared by impregnation of supported manganese oxide catalysts with a chloroplatinic acid solution. Supported manganese oxide catalysts used as bare catalysts were prepared from different manganese precursors (nitrate and acetate) and with two manganese loadings. Supported pure platinum catalysts were also prepared as a reference. The catalytic activity was evaluated in ethanol and toluene combustion. Considering the catalysts from the different manganese precursors separately, the catalytic activity increased with increasing platinum dispersion. The platinum dispersion was affected by the presence of basic sites on the surface. Furthermore, at least two different platinum active sites were found to exist on the surface. The sites corresponding to a direct platinum−Al2O3 interaction were more active than those corresponding to a platinum−manganese oxide interaction. Finally, the catalytic tests in the combustion of an ethanol−toluene mixture demonstrated that manganese plays a beneficial role in avoiding the inhibition of toluene combustion that is observed on pure platinum catalysts. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie801310t