High temperature treated Pt/Sn ZnAl2O4 catalysts
作者： P. Bosch , M.A. Valenzuela , B. Zapata , D. Acosta , G. Aguilar-Ríos
DOI: 10.1016/0304-5102(94)00095-6
关键词: Dehydrogenation 、 Coprecipitation 、 Inorganic chemistry 、 Transition metal 、 Platinum 、 Heterogeneous catalysis 、 Isobutane 、 Catalysis 、 Chemisorption 、 Chemistry
摘要: Abstract SnZnAl2O4 mixed supports were prepared by coprecipitation method with Sn contents of 0.5, 1.6 and 3 wt.%. Later Pt (1 wt.%) was incorporated impregnation samples reduced in hydrogen at 823 1073 K. Chemisorption data showed a decrease as temperature increases which is attributed to PtSn alloy formation. Catalytic activity isobutane dehydrogenation n-heptane dehydrocyclization seems be dependent on the amount metallic phase. Pt/SnZnAl2O4 catalysts thermally more stable than Pt/ZnAl2O4 preparation. Tin alters ZnAl2O4 properties towards higher thermal stability, but if added 1 wt.%, it alloys platinum inhibiting catalytic performance.
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