Nonoxidative conversion of methane into aromatic hydrocarbons on Ni-Mo/ZSM-5 catalysts

A. V. Vosmerikov, V. I. Zaikovskii, L. L. Korobitsyna, G. V. Echevskii, V. V. Kozlov, Ya E. Barbashin, S. P. Zhuravkov

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16 Citations (Scopus)

Abstract

The nonoxidative conversion of methane into aromatic hydrocarbons on high-silica zeolites ZSM-5 containing nanosized powders of molybdenum (4.0 wt %) and nickel (0.1-2.0 wt %) was studied. Data on the acid characteristics of the catalysts and the nature and amount of coke deposits formed on the surface of the catalysts were obtained using the thermal desorption of ammonia and thermal analysis. The microstructure and composition of Ni-Mo/ZSM-5 catalysts were studied by high-resolution transmission electron microscopy and energy-dispersive X-ray analysis. The formation of various chemical species in the samples was detected: oxide-like clusters of Mo within zeolite channels (1 nm), molybdenum carbide particles (5-30 nm) on the outer surface of the zeolite, and Ni-Mo alloy particles with different compositions (under reaction conditions, carbon filaments grew on these particles). It was found that, as the Ni content was increased from 0.1 to 2.0 wt %, the rate of deactivation of the catalytic system increased because of blocking pores in the zeolite structure by filamentous carbon up to the formation of condensed coke deposits.

Original languageEnglish
Pages (from-to)725-733
Number of pages9
JournalKinetics and Catalysis
Volume50
Issue number5
DOIs
Publication statusPublished - 1 Sep 2009

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Modelling and Simulation
  • Computer Science Applications

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    Vosmerikov, A. V., Zaikovskii, V. I., Korobitsyna, L. L., Echevskii, G. V., Kozlov, V. V., Barbashin, Y. E., & Zhuravkov, S. P. (2009). Nonoxidative conversion of methane into aromatic hydrocarbons on Ni-Mo/ZSM-5 catalysts. Kinetics and Catalysis, 50(5), 725-733. https://doi.org/10.1134/S0023158409050140