Adsorption and reactions of CH3Cl on Mo2C based catalyst

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

The adsorption of CH3Cl on ZSM-5, Mo2C/ZSM-5 and Mo2C/SiO2 was investigated by temperature-programmed desorption (TPD) and Fourier transform infrared spectroscopy (FTIR). The formation of methoxy species was clearly identified on all the three catalysts. Three elementary steps were considered to explain the absorption bands observed in the IR spectra and to describe the reaction products found at higher temperatures: (i) the interaction of CH3Cl with the OH groups of ZSM-5, (ii) dissociation of CH3Cl yielding CH3, and (iii) the elimination of HCl from the adsorbed CH3Cl to give CH2 species. A new finding was the identification of the alkenyl carbocation formed on the Lewis acidic sites of ZSM-5. The decomposition of CH3Cl on ZSM-5 proceeded at 673 K with a high conversion yielding propylene, ethylene, butane, methane and benzene in decreasing selectivities. Deposition of Mo2C on ZSM only slightly modified the catalytic behavior of ZSM-5. Its promoter effect came into prominence on silica surface. (C) 2000 Published by Elsevier Science B.V.

Original languageEnglish
Pages (from-to)335-343
Number of pages9
JournalJournal of Molecular Catalysis A: Chemical
Volume162
Issue number1-2
DOIs
Publication statusPublished - Nov 20 2000

Fingerprint

Methane
Butane
Temperature programmed desorption
butanes
Benzene
propylene
Reaction products
Silicon Dioxide
reaction products
Propylene
Fourier transform infrared spectroscopy
Absorption spectra
elimination
Ethylene
ethylene
methane
selectivity
desorption
infrared spectroscopy
benzene

Keywords

  • Adsorption and reactions
  • CHCl
  • MoC-based catalyst

ASJC Scopus subject areas

  • Catalysis
  • Process Chemistry and Technology

Cite this

Adsorption and reactions of CH3Cl on Mo2C based catalyst. / Cserényi, J.; Óvári, L.; Bánsági, T.; Solymosi, F.

In: Journal of Molecular Catalysis A: Chemical, Vol. 162, No. 1-2, 20.11.2000, p. 335-343.

Research output: Contribution to journalArticle

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