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

被引：15

作者：

Arcozzi, Elena ^{[1
]}

Ballarini, Nicola ^{[1
]}

Cavani, Fabrizio ^{[1
]}

Cimini, Massimo ^{[1
]}

Lucarelli, Carlo ^{[1
]}

Trifiro, Ferruccio ^{[1
]}

Delichere, Pierre ^{[2
]}

Millet, Jean-Marc M. ^{[2
]}

Marion, Philippe ^{[3
]}

机构：

[1] Univ Bologna, Dipartimento Chim Ind & Mat, I-40136 Bologna, Italy

[2] Univ Lyon 1, CNRS, UMR5256, IRCELYON, F-69626 Villeurbanne, France

[3] Ctr Rech & Technol, F-69190 St Fons, France

来源：

CATALYSIS TODAY | 2008年 / 138卷 / 1-2期

关键词：

propane ammoxidation; acrylonitrile; rutile mixed oxides; tin/vanadium/niobium/antimony mixed; oxides;

D O I：

10.1016/j.cattod.2008.04.044

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

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.

引用

页码：97 / 103

页数：7

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