Preparation of vanadium phosphate catalysts using water as solvent

The synthesis of vanadium phosphorus oxide catalysts for the selective oxidation of n-butane using V 2O 4 as a starting material with water as solvent is described. In the absence of added water, V 2O 4 and either H 3PO 4 or H 4P 2O 7 react at 145 °C to form well crystalline VOHPO 4·0.5H 2O. The sur...

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Bibliographic Details
Published in:Catalysis today 2003-06, Vol.81 (2), p.197-203
Main Authors: Bartley, Jonathan K, Lopez-Sanchez, Jose Antonio, Hutchings, Graham J
Format: Article
Language:English
Subjects:
(VO) 2P 2O 7
Catalysis
Catalysts: preparations and properties
Chemistry
Exact sciences and technology
General and physical chemistry
n-Butane oxidation
Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry
V 2O 4 reaction with H 3PO 4
Vanadium phosphate catalysts
VOHPO 4·0.5H 2O
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Summary:The synthesis of vanadium phosphorus oxide catalysts for the selective oxidation of n-butane using V 2O 4 as a starting material with water as solvent is described. In the absence of added water, V 2O 4 and either H 3PO 4 or H 4P 2O 7 react at 145 °C to form well crystalline VOHPO 4·0.5H 2O. The surface area of the precursor is significantly enhanced when water is added as a solvent. On activation in n-butane/air the catalyst surface area is increased from ca. 4 m 2/g for the precursor to 10–13 m 2/g. The catalytic performance data in terms of n-butane conversion and maleic anhydride selectivity, is comparable to other non-promoted vanadium phosphate catalysts.
ISSN:0920-5861
1873-4308
DOI:10.1016/S0920-5861(03)00115-9