Adsorption and reactions of butyl species over Mo 2C catalyst

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Abstract

The adsorption and reactions of butyl iodide on Mo 2C/ZSM-5 and Mo 2C/SiO 2 have been investigated by means of FTIR spectroscopy and mass spectrometry. Adsorption bands were observed following the adsorption of butyl iodide at 200-230 K that corresponds well to the vibrations of molecularly adsorbed C 4H 9I. At higher adsorption temperatures, bands due to the adsorbed butene and butylidyne also appeared. From the comparison of the adsorption and desorption characteristics determined on pure and Mo 2C-containing ZSM-5, it was concluded that the majority of butyl iodide is attached to ZSM-5. The presence of Mo 2C on ZSM-5 and SiO 2, however, enhanced the rate of the decomposition, promoted the coupling of butyl species and catalyzed the formation of xylene and benzene. It was assumed that Mo 2C interacting with the acidic sites of the support is the active center for the latter processes.

Original languageEnglish
Pages (from-to)217-223
Number of pages7
JournalJournal of Molecular Catalysis A: Chemical
Volume225
Issue number2
DOIs
Publication statusPublished - Jan 18 2005

Keywords

  • Adsorption
  • Benzene
  • Butane

ASJC Scopus subject areas

  • Catalysis
  • Process Chemistry and Technology
  • Physical and Theoretical Chemistry

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