Anatase-rutile transformation in TiO2-V2O5 catalyst coatings for ceramic foams

被引：37

作者：

Bucharsky, E. C. ^{[1
]}

Schell, G. ^{[1
]}

Oberacker, R. ^{[1
]}

Hoffmann, M. J. ^{[1
]}

机构：

[1] Univ Karlsruhe, Inst Ceram & Mech Engn, D-76131 Karlsruhe, Germany

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2009年 / 29卷 / 10期

关键词：

V2O5-TiO2; catalyst; Anatase phase transformation; Washcoat; Ceramic foams; TEMPERATURE-PROGRAMMED REDUCTION; VANADIA-TITANIA CATALYSTS; O-XYLENE; SOLID-SOLUTIONS; V2O5-TIO2; CATALYSTS; SURFACE-STRUCTURE; DIOXIDE SYSTEM; MIXED OXIDES; OXIDATION; TIO2;

D O I：

10.1016/j.jeurceramsoc.2008.12.007

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

081705 [工业催化]; 082905 [生物质能源与材料];

摘要：

The aim of this investigation was to study the thermal stability of TiO2-V2O5 catalysts prepared from aqueous powder suspensions based on pigment grade anatase and sub-micron vanadia particles. Such catalysts are proposed for dip coating of ceramic foams for application in a new reactor design for the synthesis of phthalic anhydride. Catalyst mixtures with vanadia contents up to 10% were annealed in air in the temperature range from 400 to 1200 degrees C. The influence of temperature and vanadia content on the anatase to rutile transformation and the specific surface were monitored, employing XRD, SEM and BET measurements. Results show that the addition Of V2O5 strongly affects the temperature of phase transformation. This process is accompanied by a large decrease of surface area. The structural changes can produce a pronounced effect on catalytic performance for the oxidation reaction of o-xylene. Possible mechanisms and the consequences for catalytic performance are discussed. (C) 2008 Elsevier Ltd. All rights reserved.

引用

页码：1955 / 1961

页数：7

共 39 条

[1]

Barakat M.A., 2005, J NANOSCIENCE NANOTE, VX, P1

[2]

Investigation of grinding effects in binary mixtures from the TiO2-SnO2-V2O5 system [J].

BeginColin, S ;

LeCaer, G ;

Mocellin, A ;

Jurenka, C ;

Zandona, M .

JOURNAL OF SOLID STATE CHEMISTRY, 1996, 127 (01) :98-108

[3]

BOND G, 1991, APPL CATAL, P1

[4]

VANADIUM PENTOXIDE TITANIUM DIOXIDE SYSTEM - STRUCTURAL INVESTIGATION AND ACTIVITY FOR THE OXIDATION OF BUTADIENE [J].

BOND, GC ;

SARKANY, AJ .

JOURNAL OF CATALYSIS, 1979, 57 (03) :476-493

[5]

THE VANADIUM PENTOXIDE TITANIUM-DIOXIDE SYSTEM .2. OXIDATION OF ORTHO-XYLENE ON A MONOLAYER CATALYST [J].

BOND, GC ;

KONIG, P .

JOURNAL OF CATALYSIS, 1982, 77 (02) :309-322

[6]

TEMPERATURE-PROGRAMMED REDUCTION OF V2O5 AND COPRECIPITATED V2O5-TIO2 BY HYDROGEN [J].

BRIAND, LE ;

GAMBARO, L ;

THOMAS, H .

JOURNAL OF THERMAL ANALYSIS, 1995, 44 (04) :803-821

[7]

Ceramic foam monoliths as catalyst carriers. 1. Adjustment and description of the morphology [J].

Buciuman, FC ;

Kraushaar-Czarnetzki, B .

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 2003, 42 (09) :1863-1869

[8]

SURFACE-STRUCTURE AND REACTIVITY OF VANADIUM-OXIDE SUPPORTED ON TITANIUM-DIOXIDE - V2O5/TIO2 (RUTILE) CATALYSTS PREPARED BY HYDROLYSIS [J].

CAVANI, F ;

CENTI, G ;

FORESTI, E ;

TRIFIRO, F ;

BUSCA, G .

JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS I, 1988, 84 :237-254

[9]

SURFACE-STRUCTURE AND REACTIVITY OF V-TI-O CATALYSTS PREPARED BY SOLID-STATE REACTION .2. NATURE OF THE ACTIVE PHASE FORMED DURING ORTHO-XYLENE OXIDATION [J].

CENTI, G ;

PINELLI, D ;

TRIFIRO, F ;

GHOUSSOUB, D ;

GUELTON, M ;

GENGEMBRE, L .

JOURNAL OF CATALYSIS, 1991, 130 (01) :238-256

[10]

ESR STUDIES OF THE SOLID-SOLUTIONS OF VANADIUM IONS IN TIO2 [J].

DYREK, K ;

SERWICKA, E ;

GRZYBOWSKA, B .

REACTION KINETICS AND CATALYSIS LETTERS, 1979, 10 (01) :93-97

← 1 2 3 4 →