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Modification of platinum-alumina catalysts. Effect of the addition of lithium to platinum in the dehydrogenation of cyclohexane

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Abstract

The modification of platinum-alumina catalysts by 0.1 wt% lithium does not affect to a large extent the dehydrogenating properties of platinum. However, when lithium is added to platinum through impregnation by nitrate salt in a higher content, residual nitrate species can remain on the catalyst surface, even after calcination at 773 K. These nitrate species can be coreduced with the platinum precursor and be associated to a significant sintering of the platinum particles.

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Author notes

  1. Fabio B. Passos

    Present address: Departamento de Engenharia Química, Universidade Federal Fluminense, Rua Passo da Pátria, 156, CEP. 24.210 Niterói, Rio de Janeiro, Brazil

Authors and Affiliations

  1. NUCAT, COPPE, Universidade Federal do Rio de Janeiro, CP 68.502, CEP. 21.945-970, Rio de Janeiro, Brazil

    Fabio B. Passos & Martin Schmal

  2. Institut de Recherches sur la Catalyse, CNRS, 2 Av. Einstein, 69626, Villeurbanne Cedex, France

    Roger Fréty

Authors
  1. Fabio B. Passos
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  2. Roger Fréty
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  3. Martin Schmal
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Passos, F.B., Fréty, R. & Schmal, M. Modification of platinum-alumina catalysts. Effect of the addition of lithium to platinum in the dehydrogenation of cyclohexane. Catal Lett 29, 109–113 (1994). https://doi.org/10.1007/BF00814257

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  • DOI: https://doi.org/10.1007/BF00814257

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