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Effect of synthesis conditions on the structure and catalytic performance of V- and Ce-incorporated SBA-15-like materials in propane selective oxidation / Ozge Aktas in Industrial & engineering chemistry research, Vol. 49 N° 15 (Août 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 15 (Août 2010) . - pp 6790–6802 Titre : Effect of synthesis conditions on the structure and catalytic performance of V- and Ce-incorporated SBA-15-like materials in propane selective oxidation Type de document : texte imprimé Auteurs : Ozge Aktas, Auteur ; Sena Yasyerli, Auteur ; Gulsen Dogu, Auteur Année de publication : 2010 Article en page(s) : pp 6790–6802 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Catalyst  Selective  Oxidation. Résumé : Vanadia- and/or ceria-incorporated SBA-15-like materials were prepared by impregnation and one-pot hydrothermal synthesis procedures at different solution pH values. The pH of the synthesis solution was found to have a very strong effect on the pore structure, chemical composition, and morphology of the synthesized materials. Materials synthesized by impregnation of V and/or Ce and by the one-pot hydrothermal route at pH 1.0 showed the characteristic ordered pore structure of SBA-15. However, the materials prepared by the one-pot synthesis route at pH 1.5 gave complex pore structures with bottleneck-shaped and/or slit-like interconnected pores. Activity tests in the selective oxidation of propane showed higher activities for the V-incorporated materials than for the materials containing Ce and V−Ce. Catalysts synthesized by impregnation gave higher propane conversions. However, the propylene selectivity values were higher with the catalysts prepared by the one-pot route. An increase in the temperature from 550 to 600 °C led to increases in both the conversion and the propylene selectivity with the V- and V−Ce-incorporated materials prepared by the one-pot procedure at pH 1.5. For the V-incorporated catalyst prepared by this route, the propane conversion and propylene selectivity were obtained as 40% and 62%, respectively, at a space time of 0.4 s·g·cm−3 and a temperature of 600 °C. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901672b [article] Effect of synthesis conditions on the structure and catalytic performance of V- and Ce-incorporated SBA-15-like materials in propane selective oxidation [texte imprimé] / Ozge Aktas, Auteur ; Sena Yasyerli, Auteur ; Gulsen Dogu, Auteur . - 2010 . - pp 6790–6802. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 15 (Août 2010) . - pp 6790–6802 Mots-clés : Catalyst  Selective  Oxidation. Résumé : Vanadia- and/or ceria-incorporated SBA-15-like materials were prepared by impregnation and one-pot hydrothermal synthesis procedures at different solution pH values. The pH of the synthesis solution was found to have a very strong effect on the pore structure, chemical composition, and morphology of the synthesized materials. Materials synthesized by impregnation of V and/or Ce and by the one-pot hydrothermal route at pH 1.0 showed the characteristic ordered pore structure of SBA-15. However, the materials prepared by the one-pot synthesis route at pH 1.5 gave complex pore structures with bottleneck-shaped and/or slit-like interconnected pores. Activity tests in the selective oxidation of propane showed higher activities for the V-incorporated materials than for the materials containing Ce and V−Ce. Catalysts synthesized by impregnation gave higher propane conversions. However, the propylene selectivity values were higher with the catalysts prepared by the one-pot route. An increase in the temperature from 550 to 600 °C led to increases in both the conversion and the propylene selectivity with the V- and V−Ce-incorporated materials prepared by the one-pot procedure at pH 1.5. For the V-incorporated catalyst prepared by this route, the propane conversion and propylene selectivity were obtained as 40% and 62%, respectively, at a space time of 0.4 s·g·cm−3 and a temperature of 600 °C. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901672b