caa a22 4500 463252306 CHVBK 20180405153343.0 cr unu---uuuuu 170326e20071101xx s 000 0 eng 10.1007/s10562-007-9215-5 doi (NATIONALLICENCE)springer-10.1007/s10562-007-9215-5 Characterization and Catalytic Performance of PtSn Catalysts Supported on Al2O3 and Na-doped Al2O3 in n -butane Dehydrogenation [Elektronische Daten] [Sergio de Miguel, Sonia Bocanegra, I. Vilella, A. Guerrero-Ruiz, Osvaldo Scelza] PtSn/Al2O3 and PtSn/Al2O3-Na catalysts display important modifications of the metallic phase with respect to Pt/Al2O3 one. In this sense, TPR and XPS results show the presence of strong interactions between Pt and Sn, with probable alloy formation, which would be responsible for the decrease of the reaction rate and the increase of the activation energy in cyclohexane dehydrogenation. Besides the experiments of cyclopentane hydrogenolysis show that the alkali metal addition to bimetallic PtSn/Al2O3 catalysts completely eliminates the hydrogenolytic ensembles, which could be due to a geometric modification of the metallic phase. These important modifications in the nature of the metallic function due to the simultaneous addition of Na and Sn to Pt/Al2O3 are responsible for the excellent catalytic performance in the n-butane dehydrogenation, thus giving high conversions, selectivities to butenes higher than 95%, and lower deactivation capacity than those corresponding to bimetallic PtSn catalysts (with different Sn contents) supported on undoped alumina. The excellent stability of PtSn/Al2O3-Na catalysts would be due to a low carbon formation during the reaction, such as it was observed from pulse experiments. Springer Science+Business Media, LLC, 2007 Paraffin dehydrogenation nationallicence Pt and PtSn supported catalysts nationallicence Na-doped alumina supports nationallicence Characterization of supported metallic catalysts nationallicence de Miguel Sergio Instituto de Investigaciones en Catálisis y Petroquímica, Facultad de Ingeniería Química, Universidad Nacional del Litoral-CONICET, Santiago del Estero 2654, 3000, Santa Fe, Argentina aut Bocanegra Sonia Instituto de Investigaciones en Catálisis y Petroquímica, Facultad de Ingeniería Química, Universidad Nacional del Litoral-CONICET, Santiago del Estero 2654, 3000, Santa Fe, Argentina aut Vilella I. Instituto de Investigaciones en Catálisis y Petroquímica, Facultad de Ingeniería Química, Universidad Nacional del Litoral-CONICET, Santiago del Estero 2654, 3000, Santa Fe, Argentina aut Guerrero-Ruiz A. Facultad de Ciencias, Universidad Nacional de Educación a Distancia, Madrid, Spain aut Scelza Osvaldo Instituto de Investigaciones en Catálisis y Petroquímica, Facultad de Ingeniería Química, Universidad Nacional del Litoral-CONICET, Santiago del Estero 2654, 3000, Santa Fe, Argentina aut Catalysis Letters Springer US; http://www.springer-ny.com 119/1-2(2007-11-01), 5-15 1011-372X 119:1-2<5 2007 119 10562 https://doi.org/10.1007/s10562-007-9215-5 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10562-007-9215-5 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- de Miguel Sergio Instituto de Investigaciones en Catálisis y Petroquímica, Facultad de Ingeniería Química, Universidad Nacional del Litoral-CONICET, Santiago del Estero 2654, 3000, Santa Fe, Argentina aut NATIONALLICENCE 700 1- Bocanegra Sonia Instituto de Investigaciones en Catálisis y Petroquímica, Facultad de Ingeniería Química, Universidad Nacional del Litoral-CONICET, Santiago del Estero 2654, 3000, Santa Fe, Argentina aut NATIONALLICENCE 700 1- Vilella I. Instituto de Investigaciones en Catálisis y Petroquímica, Facultad de Ingeniería Química, Universidad Nacional del Litoral-CONICET, Santiago del Estero 2654, 3000, Santa Fe, Argentina aut NATIONALLICENCE 700 1- Guerrero-Ruiz A. Facultad de Ciencias, Universidad Nacional de Educación a Distancia, Madrid, Spain aut NATIONALLICENCE 700 1- Scelza Osvaldo Instituto de Investigaciones en Catálisis y Petroquímica, Facultad de Ingeniería Química, Universidad Nacional del Litoral-CONICET, Santiago del Estero 2654, 3000, Santa Fe, Argentina aut NATIONALLICENCE 773 0- Catalysis Letters Springer US; http://www.springer-ny.com 119/1-2(2007-11-01), 5-15 1011-372X 119:1-2<5 2007 119 10562 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer