Influence of Milling Media on the Physicochemicals and Catalytic Properties of Mechanochemical Treated Vanadium Phosphate Catalysts

VOHPO₄·0.5H₂O synthesized via the alcohol reduction of VOPO₄·2H₂O was mechanochemical treated for 30 min in three different media, i.e. cyclohexane, ethanol and air. XRD results revealed that their structure became less crystalline compared to the unmilled material. SEM showed that the particles for...

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Veröffentlicht in:Catalysis letters Jg. 141; H. 3; S. 400 - 407
Hauptverfasser: Taufiq-Yap, Y. H, Goh, C. K, Hutchings, G. J, Dummer, N, Bartley, J. K
Format: Journal Article
Sprache:Englisch
Veröffentlicht: Boston Boston : Springer US 01.03.2011
Springer US
Springer
Springer Nature B.V
Schlagworte:
Analysis
Anhydrides
Butane
Carbocyclic compounds
Catalysis
Catalysts
Chemical synthesis
Chemistry
Chemistry and Materials Science
Crystallites
Cyclohexane
Ethanol
Exact sciences and technology
General and physical chemistry
Industrial Chemistry/Chemical Engineering
Maleic anhydride
Mechanochemical
n-butane oxidation
Organometallic Chemistry
Oxidation
Phosphates
Physical Chemistry
Selectivity
Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry
Toy industry
Vanadium
Vanadium phosphate
Mechanochemical
butane oxidation
Vanadium phosphate
Maleic anhydride
Correlation
Alcohol
Selectivity
Particle
Chemical reduction
Butane
Crystallites
Alkanol
Oxidation
Chemical reactivity
Structure
Scanning electron microscopy
Oxygen
Catalytic reaction
n-butane oxidation
Ethanol
Air
X ray diffraction
Heterogeneous catalysis
Cyclohexane
Catalyst
Physicochemical properties
ISSN:1011-372X, 1572-879X
Online-Zugang:Volltext
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Zusammenfassung:VOHPO₄·0.5H₂O synthesized via the alcohol reduction of VOPO₄·2H₂O was mechanochemical treated for 30 min in three different media, i.e. cyclohexane, ethanol and air. XRD results revealed that their structure became less crystalline compared to the unmilled material. SEM showed that the particles for the milled materials become smaller and unique features were observed in the different type of media used. The reactivity of the oxygen species linked to V⁵⁺ and V⁴⁺ were also affected by the milling process. The selectivity to maleic anhydride from n-butane oxidation were observed to increase in line with the increase in the oxygen species associated with V⁵⁺ and the presence of isolated V⁵⁺ phase. A correlation was observed between the crystallite size of the pyrophosphate phase at (020) plane with the maleic anhydride selectivity. Graphical Abstract [graphic removed] .
Bibliographie:http://dx.doi.org/10.1007/s10562-010-0508-8
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ISSN:1011-372X
1572-879X
DOI:10.1007/s10562-010-0508-8