The role of Sb and Nb in rutile-type Sn/V/Nb/Sb mixed oxides, catalysts for propane ammoxidation to acrylonitrile

被引：14

作者：

Ballarini, Nicola ^{[1
,2
]}

Cavani, Fabrizio ^{[1
,2
]}

Di Memmo, Sergio ^{[1
]}

Zappoli, Francesca ^{[1
]}

Marion, Philippe ^{[3
]}

机构：

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

[2] Res Unit Bologna, INSTM, FP6, EU, Bologna, Italy

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

来源：

CATALYSIS TODAY | 2009年 / 141卷 / 3-4期

关键词：

Propane ammoxidation; Acrylonitrile; Rutile; Tin vanadium antimony mixed oxides; Niobium oxide; RAMAN-SPECTROSCOPY; ACTIVE-SITES; VANADIUM; NIOBIUM; OXIDEHYDROGENATION; DEHYDROGENATION; SUBSTITUTION; ANTIMONATE; REACTIVITY; OXIDATION;

D O I：

10.1016/j.cattod.2008.08.041

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

This paper describes the role of Sb and Nb, components of Sn/V/Nb/Sb mixed oxides catalysts for the gas-phase ammoxidation of propane to acrylonitrile. In samples without Nb and with atomic ratios Sn/V/Sb 1/0.2/x (x = 0 to 3), Sb in the form of amorphous oxide is necessary in order to obtain an active and selective catalyst. However, during reaction the dispersed Sb oxide segregates to alpha-Sb2O4, and the yield to acrylonitrile decreases considerably. The addition of Nb gives rise to the formation of Nb-containing SbOx and non-stoichiometric rutile-type V/Nb/Sb mixed oxides. The presence of these compounds enhances the catalytic activity and the selectivity to acrylonitrile. Moreover, the catalyst shows a stable catalytic performance, with no segregation of alpha-Sb2O4. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：264 / 270

页数：7

共 36 条

[1] Propane ammoxidation to acrylonitrile over a tin-based mixed-oxide catalyst [J].

Albonetti, S ;

Blanchard, G ;

Burattin, P ;

Cavani, F ;

Masetti, S ;

Trifiro, F .

CATALYSIS TODAY, 1998, 42 (03) :283-295

[2]

ALBONETTI S, Patent No. 6083869

[3]

Arpentinier P., 2001, The Technology of Catalytic Oxidations: Safety aspects

[4] Role of Nb in rutile-type Cr/V/Sb/Nb mixed oxides, catalysts for propane ammoxidation to acrylonitrile [J].

Ballarini, N. ;

Cavani, F. ;

Cimini, M. ;

Trifiro, F. ;

Millet, J. M. M. ;

Cornaro, U. ;

Catani, R. .

JOURNAL OF CATALYSIS, 2006, 241 (02) :255-267

[5]

Ballarini N, 2005, STUD SURF SCI CATAL, V155, P81

[6] CrN/Sb mixed oxides, catalysts for the ammoxidation of propane to acrylonitrile -: Part II.: Effect of catalyst composition on catalytic performance [J].

Ballarini, N ;

Cavani, F ;

Cimini, A ;

Trifirò, E ;

Catani, R ;

Cornaro, U ;

Ghisletti, D .

APPLIED CATALYSIS A-GENERAL, 2003, 251 (01) :49-59

[7] Reactivity of V/Nb mixed oxides in the oxidehydrogenation of propane under co-feed and under redox-decoupling conditions [J].

Ballarini, N ;

Cavani, F ;

Cortelli, C ;

Giunchi, C ;

Nobili, P ;

Trifirò, F ;

Catani, R ;

Cornaro, U .

CATALYSIS TODAY, 2003, 78 (1-4) :353-364

[8]

BORDONI S, 1994, STUD SURF SCI CATAL, V82, P93

[9]

BORDONI S, 1994, J CHEM SOC FARADAY T, V2981

[10] Niobium pentoxide prepared by soft chemical routes: morphology, structure, defects and quantum size effect [J].

Brayner, R ;

Bozon-Verduraz, F .

PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 2003, 5 (07) :1457-1466

← 1 2 3 4 →