High surface area Mo–V–Te–Nb–O catalysts: Preparation, characterization and catalytic behaviour in ammoxidation of propane

Mo–V–Te–Nb mixed oxides with a molar ratio of 1:0.30:0.20:0.15 were prepared by citrate and dry-up method, both associated with hydrothermal treatments in the presence of a cationic surfactant (cetyl trimethylammonium bromide, CTAB), and tested in the ammoxidation of propane. The catalysts were char...

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Bibliographic Details
Published in:Catalysis today 2006-03, Vol.112 (1), p.139-142
Main Authors: Florea, M., Mamede, A.-S., Eloy, P., Parvulescu, V.I., Gaigneaux, E.M.
Format: Article
Language:English
Subjects:
Ammoxidation
Catalysis
Chemistry
Citrate method
Dry-up method
Exact sciences and technology
General and physical chemistry
Mo–V–Te–Nb mixed oxides
Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry
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Summary:Mo–V–Te–Nb mixed oxides with a molar ratio of 1:0.30:0.20:0.15 were prepared by citrate and dry-up method, both associated with hydrothermal treatments in the presence of a cationic surfactant (cetyl trimethylammonium bromide, CTAB), and tested in the ammoxidation of propane. The catalysts were characterized by adsorption–desorption isotherms of nitrogen at 77 K, particle size measurements, XRD, and XPS. By using the surfactant, the surface area increased significantly, and samples with surface area between 110 and 239 m 2/g were obtained. These catalysts exhibited a propane conversion near 48% with selectivity to acrylonitrile of about 32% for a space velocity 30 times higher than generally reported.
ISSN:0920-5861
1873-4308
DOI:10.1016/j.cattod.2005.11.080