Characterization and activity of Pt-Sn/Al2O3 catalysts of different preparation: coimpregnation and new Pt-Sn precursor |
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| Authors: | C. Kappenstein M. Saouabe M. Guérin P. Marecot I. Uszkurat Z. Paál |
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| Affiliation: | (1) Faculté des Sciences, LACCO, URA CNRS 350, 40 A venue du Recteur Pineau, 86000 Poitiers, France;(2) Institute of Isotopes of the Hungarian Academy of Sciences, PO Box 77, H-1525 Budapest, Hungary |
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| Abstract: | A new bimetallic Pt-Sn compound [Pt(NH3)4][SnCl6] has been used as precursor for the preparation of supported Pt-Sn/Al2O3 catalysts. A comparison of a dried sample with that prepared by coimpregnation displays different behaviour in TPR, chemisorption. The initial catalytic activity properties were checked in the reactions of cyclohexane dehydrogenation and cyclopentane ring opening, whilen-hexane skeletal reactions were used to probe the quasisteady-state activity. The catalyst prepared via the Pt-Sn complex precursors exhibited some-what lower specific activity. This fact, together with enhanced olefin formation fromn-hexane was taken as an indication of lower amount of contiguous Pt atoms and some electronic interaction between Pt and Sn in that catalyst.On leave from Fachhochschule Ostfriesland, D-26723 Emden, Germany. |
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| Keywords: | catalyst preparation alumina supported platinum-tin catalysts coimpregnation bimetallic precursor TPR cyclohexane dehydrogenation cyclopentane ring opening n-hexane skeletal reactions |
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