Preparation and high performance of La2O3-V 2O5/MCM-41 catalysts for ethylbenzene dehydrogenation in the presence of CO2

B. S. Liu, R. Z. Chang, L. Jiang, W. Liu, Chak Tong AU

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40 Citations (Scopus)

Abstract

A series of La2O3-V2O5/MCM-41 catalysts with high specific surface area were prepared by means of incipient wetness impregnation for the dehydrogenation of ethylbenzene to styrene using CO2 as oxidant. At 600 °C, the conversion of ethylbenzene and selectivity to styrene over 10La15V/MCM-41 after an on-stream time of 4 h was about 86.5 and 91.0%, respectively. The properties of the catalysts before and after the reaction were characterized using techniques such as X-ray diffraction, specific surface area, Fourier transform infrared spectroscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, temperature-programmed desorption, and oxidation. The high catalytic activity and stability of 10La15V/MCM-41 during dehydrogenation of ethylbenzene is attributed to an optimized La/V atomic ratio. The accumulation of amorphous carbon species on the external surface of La2O3-V 2O5/MCM-41 is the cause for catalyst deactivation.

Original languageEnglish
Pages (from-to)15490-15501
Number of pages12
JournalJournal of Physical Chemistry C
Volume112
Issue number39
DOIs
Publication statusPublished - 2 Oct 2008

Scopus Subject Areas

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films

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