On the stepwise change of activation energies in the hydrodechlorination of chlorobenzene over supported nickel

Mark A. Keane, Ragnar Larsson

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Kinetics of chlorobenzene hydrodechlorination have been measured over Ni on SiO2, Al2O3, MgO, activated carbon and graphite. A stepwise variation of Ea is analysed using the selective energy transfer model where Ea is identified as the vibrational energy associated with an excitation of the chlorobenzene out-of-plane C-H bending mode. Variation of Ea with vibrational quantum number yields a vibrational frequency of 749 cm-1 and a value (-1.1 cm-1) for the anharmonicity term, which is characteristic of bending vibrational modes. Our analysis suggests that the reacting species are weakly adsorbed on the catalyst: heat of adsorption = -0.31 kJ mol-1. © 2007 Elsevier B.V. All rights reserved.

Original languageEnglish
Pages (from-to)333-336
Number of pages4
JournalCatalysis Communications
Volume9
Issue number3
DOIs
Publication statusPublished - 1 Mar 2008

Keywords

  • Anharmonicity
  • Apparent activation energy
  • Catalytic hydrodechlorination
  • Chlorobenzene
  • Heat of adsorption
  • Selective energy transfer model

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