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- W2076620963 abstract "Vanadium oxide catalysts with V2O5 loadings ranging 1 to 9% (w/w) supported on 1∶1 wt% Nb2O5–TiO2 mixed oxide have been prepared by the wet impregnation method. The calcined samples were characterized by X-ray diffraction (XRD), pulse oxygen chemisorption and temperature programmed desorption (TPD) of NH3. Dispersion of vanadia was determined by oxygen chemisorption at 643 K in a dynamic method. At low V2O5 loadings, vanadia is found to be present in a highly dispersed state. X-Ray diffraction results also suggest that vanadium oxide exists in a highly dispersed state at lower loadings and in a crystalline V2O5 phase at higher vanadia loadings (5 wt% and above). The dispersion of vanadia was found to decrease with V2O5 loading due to the formation of V2O5 crystallites. The catalytic properties were evaluated for the vapor phase ammoxidation of toluene to benzonitrile and correlated with characterization results." @default.
- W2076620963 created "2016-06-24" @default.
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- W2076620963 date "2002-01-01" @default.
- W2076620963 modified "2023-09-25" @default.
- W2076620963 title "Vapour phase ammoxidation of toluene over vanadium oxide supported on Nb<sub>2</sub>O<sub>5</sub>–TiO<sub>2</sub>" @default.
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- W2076620963 doi "https://doi.org/10.1039/b206581a" @default.
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