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Effect of macropore formation in Pt catalyst supports on the oxidation activity for diesel fuel mist / Junko Uchisawa in Industrial & engineering chemistry research, Vol. 51 N° 2 (Janvier 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 2 (Janvier 2012) . - pp. 719-724 Titre : Effect of macropore formation in Pt catalyst supports on the oxidation activity for diesel fuel mist Type de document : texte imprimé Auteurs : Junko Uchisawa, Auteur ; Akira Obuchi, Auteur ; Tetsuya Nanba, Auteur Année de publication : 2012 Article en page(s) : pp. 719-724 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Diesel  fuel  Oxidation  Catalyst  support  Macroporosity Résumé : The effect of macropore formation in catalyst supports on the oxidation activity for diesel fuel mist was examined with the goal of improving catalyst efficiency. To investigate the effect on a laboratory scale using granular samples, we designed a reaction system that supplied fuel mist to the catalyst bed directly by an air atomizing nozzle. The catalytic activity was found to be improved by macropore formation in the support. This effect was also demonstrated for a washcoated catalyst on a honeycomb with diesel engine exhaust. These results suggest that the macropore diffusion channels are secure even if fuel mist attaches to the support surface, and the reactant gas can diffuse to the interior of the support and reach the active sites. Macropore formation prevented the blockage of pores of the support surface and thus the active sites of the catalyst. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=25476404 [article] Effect of macropore formation in Pt catalyst supports on the oxidation activity for diesel fuel mist [texte imprimé] / Junko Uchisawa, Auteur ; Akira Obuchi, Auteur ; Tetsuya Nanba, Auteur . - 2012 . - pp. 719-724. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 2 (Janvier 2012) . - pp. 719-724 Mots-clés : Diesel  fuel  Oxidation  Catalyst  support  Macroporosity Résumé : The effect of macropore formation in catalyst supports on the oxidation activity for diesel fuel mist was examined with the goal of improving catalyst efficiency. To investigate the effect on a laboratory scale using granular samples, we designed a reaction system that supplied fuel mist to the catalyst bed directly by an air atomizing nozzle. The catalytic activity was found to be improved by macropore formation in the support. This effect was also demonstrated for a washcoated catalyst on a honeycomb with diesel engine exhaust. These results suggest that the macropore diffusion channels are secure even if fuel mist attaches to the support surface, and the reactant gas can diffuse to the interior of the support and reach the active sites. Macropore formation prevented the blockage of pores of the support surface and thus the active sites of the catalyst. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=25476404