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Larrondo, S.; Irigoyen, B.; Baronetti, G.; Amadeo, N. "Vanadium antimonate as a partial oxidation catalyst" (2003) Applied Catalysis A: General. 250(2):279-285
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Abstract:

The catalytic selective oxidation on vanadium antimonate oxides partially doped with titanium was studied. Solids with nominal composition VSbO 4, V0.8SbTi0.2O4 and VSb 0.8Ti0.2O4 were prepared by solid-state reaction. The solids were characterised by sorptometry, X-ray diffraction (XRD), temperature programmed reduction (TPR) and X-ray photoelectron spectroscopy (XPS). Catalytic tests were carried out in a fixed-bed reactor using toluene and air as reactants. It was found that partial substitution of V or Sb by Ti produces changes in the unit-cell composition and the redox properties of the solids. A possible role for V and Sb in the reaction mechanism of partial oxidation was established. Vanadium sites (V4+) are involved in the incorporation of gaseous oxygen as lattice oxygen and hold the Sb sites in an oxidation state (Sb5+) high enough to insert the lattice oxygen in the hydrocarbon molecule. A relationship between activity and V 4+/Sb5+ ratio of the unit-cell was found. The selectivity to benzaldehyde is correlated with the redox properties of the solids while the selectivity to total oxidation products could be interpreted by the site isolation theory. © 2003 Elsevier Science B.V. All rights reserved.

Registro:

Documento: Artículo
Título:Vanadium antimonate as a partial oxidation catalyst
Autor:Larrondo, S.; Irigoyen, B.; Baronetti, G.; Amadeo, N.
Filiación:Lab. de Procesos Catalíticos, Dpto. de Ing. Química, Ciudad Universitaria, 1428 Buenos Aires, Argentina
Consejo Nac. Invest. Cie./Tec., Buenos Aires, Argentina
Palabras clave:Titanium doping; Toluene oxidation; Vanadium antimonate; Catalyst selectivity; Composition effects; Crystal lattices; Doping (additives); Oxidation; Redox reactions; Reduction; Thermal effects; Toluene; Vanadium compounds; X ray diffraction analysis; X ray photoelectron spectroscopy; Temperature programmed reduction (TPR); Catalyst activity
Año:2003
Volumen:250
Número:2
Página de inicio:279
Página de fin:285
DOI: http://dx.doi.org/10.1016/S0926-860X(03)00255-2
Título revista:Applied Catalysis A: General
Título revista abreviado:Appl Catal A Gen
ISSN:0926860X
CODEN:ACAGE
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0926860X_v250_n2_p279_Larrondo

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Citas:

---------- APA ----------
Larrondo, S., Irigoyen, B., Baronetti, G. & Amadeo, N. (2003) . Vanadium antimonate as a partial oxidation catalyst. Applied Catalysis A: General, 250(2), 279-285.
http://dx.doi.org/10.1016/S0926-860X(03)00255-2
---------- CHICAGO ----------
Larrondo, S., Irigoyen, B., Baronetti, G., Amadeo, N. "Vanadium antimonate as a partial oxidation catalyst" . Applied Catalysis A: General 250, no. 2 (2003) : 279-285.
http://dx.doi.org/10.1016/S0926-860X(03)00255-2
---------- MLA ----------
Larrondo, S., Irigoyen, B., Baronetti, G., Amadeo, N. "Vanadium antimonate as a partial oxidation catalyst" . Applied Catalysis A: General, vol. 250, no. 2, 2003, pp. 279-285.
http://dx.doi.org/10.1016/S0926-860X(03)00255-2
---------- VANCOUVER ----------
Larrondo, S., Irigoyen, B., Baronetti, G., Amadeo, N. Vanadium antimonate as a partial oxidation catalyst. Appl Catal A Gen. 2003;250(2):279-285.
http://dx.doi.org/10.1016/S0926-860X(03)00255-2