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Mechanistic Insight in the Ethane Dehydrogenation Reaction over Cr/Al2O3 Catalysts

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A Cr/Al2O3 alkane dehydrogenation catalyst exhibits a maximum in ethylene yield during an ethane dehydrogenation cycle. Isotopic labelling experiments with monolabelled 13C-ethane and deuterium were used to elucidate whether the initial activity increase could be due to formation of an active, larger hydrocarbon intermediate on the surface. The results strongly indicate that this is not the case, and instead point to a traditional reaction cycle involving adsorption of ethane to form an ethyl species, followed by desorption of ethene and hydrogen. Transient kinetic data suggest that ethane adsorption is the rate-determining step of reaction.

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Authors and Affiliations

  1. Center for Materials Science and Nanotechnology, Institute of Chemistry, University of Oslo, 1033 Blindern, Oslo, N-0315, Norway

    Unni Olsbye, Anastasia Virnovskaia & Øystein Prytz

  2. Department of Inorganic Chemistry and Catalysis, Debye Institute, Utrecht University, 800833508, Utrecht, TB, The Netherlands

    Stan J. Tinnemans & Bert M. Weckhuysen

Authors
  1. Unni Olsbye
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  2. Anastasia Virnovskaia
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  3. Øystein Prytz
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  4. Stan J. Tinnemans
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  5. Bert M. Weckhuysen
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Correspondence to Bert M. Weckhuysen.

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Olsbye, U., Virnovskaia, A., Prytz, Ø. et al. Mechanistic Insight in the Ethane Dehydrogenation Reaction over Cr/Al2O3 Catalysts. Catal Lett 103, 143–148 (2005). https://doi.org/10.1007/s10562-005-6521-7

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  • DOI: https://doi.org/10.1007/s10562-005-6521-7

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