The control of catalytic performance of rutile-type Sn/V/Nb/Sb mixed oxides, catalysts for propane ammoxidation to acrylonitrile - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Catalysis Today Année : 2008

The control of catalytic performance of rutile-type Sn/V/Nb/Sb mixed oxides, catalysts for propane ammoxidation to acrylonitrile

E. Arcozzi
  • Fonction : Auteur
N. Ballarini
  • Fonction : Auteur
F. Cavani
  • Fonction : Auteur
M. Cimini
  • Fonction : Auteur
C. Lucarelli
  • Fonction : Auteur
F. Trifiro
  • Fonction : Auteur

Résumé

This paper describes the effect of the composition of rutile-type Sn/V/Nb/Sb mixed oxides catalysts on the catalytic performance in the gas-phase ammoxidation of propane to acrylonitrile. The variation in the atomic ratio between components in catalysts is the key for the control of activity and selectivity. In samples with atomic composition Sn/V/Nb/Sb 1/0.2/1/x (0 <= x <= 5) and 1/0.2/y/3 (0 <= y <= 3) several compounds formed, i.e., SnO2, Sb/Nb mixed oxide, Sb6O13 and non-stoichiometric rutile-type V/Nb/Sb/O; the latter segregated preferentially at the surface of the catalyst. Tin oxide provided the rutile matrix for the dispersion of the mixed oxides. The main role of Sb was shown to generate mixed oxides containing specific sites for the allylic ammoxidation of propylene intermediately formed. The presence of Nb enhanced the activity and selectivity of these sites. (C) 2008 Elsevier B.V. All rights reserved.

Domaines

Catalyse

Dates et versions

hal-00474584 , version 1 (20-04-2010)

Identifiants

Citer

E. Arcozzi, N. Ballarini, F. Cavani, M. Cimini, C. Lucarelli, et al.. The control of catalytic performance of rutile-type Sn/V/Nb/Sb mixed oxides, catalysts for propane ammoxidation to acrylonitrile. Catalysis Today, 2008, 138 (1-2), pp.97-103. ⟨10.1016/j.cattod.2008.04.044⟩. ⟨hal-00474584⟩
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