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 language | English |
|---|---|
| Pages (from-to) | 725-733 |
| Number of pages | 9 |
| Journal | Kinetics and Catalysis |
| Volume | 50 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - 1 Sep 2009 |
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ASJC Scopus subject areas
- Catalysis
- Chemistry(all)
- Modelling and Simulation
- Computer Science Applications
Cite this
Nonoxidative conversion of methane into aromatic hydrocarbons on Ni-Mo/ZSM-5 catalysts. / Vosmerikov, A. V.; Zaikovskii, V. I.; Korobitsyna, L. L.; Echevskii, G. V.; Kozlov, V. V.; Barbashin, Ya E.; Zhuravkov, S. P.
In: Kinetics and Catalysis, Vol. 50, No. 5, 01.09.2009, p. 725-733.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Nonoxidative conversion of methane into aromatic hydrocarbons on Ni-Mo/ZSM-5 catalysts
AU - Vosmerikov, A. V.
AU - Zaikovskii, V. I.
AU - Korobitsyna, L. L.
AU - Echevskii, G. V.
AU - Kozlov, V. V.
AU - Barbashin, Ya E.
AU - Zhuravkov, S. P.
PY - 2009/9/1
Y1 - 2009/9/1
N2 - 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.
AB - 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.
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UR - http://www.scopus.com/inward/citedby.url?scp=70350037727&partnerID=8YFLogxK
U2 - 10.1134/S0023158409050140
DO - 10.1134/S0023158409050140
M3 - Article
VL - 50
SP - 725
EP - 733
JO - Kinetics and Catalysis
JF - Kinetics and Catalysis
SN - 0023-1584
IS - 5
ER -