Promoted TiO2 (Anatase)-Supported Vanadium Oxide Catalysts. TPR Study and Activity in Oxidation of Toluene

[img]PDF - Authorized users only
Language: English
72Kb
Title:Promoted TiO2 (Anatase)-Supported Vanadium Oxide Catalysts. TPR Study and Activity in Oxidation of Toluene
Creators:
Antol, Marcel
Prandová, Katarina
Hronec, Milan
Journal or Publication Title:
Collection of Czechoslovak Chemical Communications, 61, 11, pp. 1665-1674
Uncontrolled Keywords:Benzoic acid, Oxidation of toluene, TPR, V<sub>2</sub>O<sub>5</sub>, Vapor phase

Abstract

Vanadium oxide doped with K, Li, Bi, Sb, Te, U or Mo oxide, supported on TiO<sub>2 </sub>- anatase, was studied by temperature programmed reduction (TPR). The influence of the addition of promoters (up to molar ratio M : V = 0.5) to 5 wt.% V<sub>2</sub>O<sub>5</sub>/TiO<sub>2 </sub>catalyst on the TPR profile is presented in correlation with their catalytic activity in the vapor phase oxidation of toluene. All promoters, except Bi<sub>2</sub>O<sub>3</sub>, decrease the catalyst reducibility and decrease the rate of the toluene oxidation. A strong negative influence on the activity of the toluene oxidation have K, Li, and Te oxides. However, the presence of all tested promoters in the molar ratio M : V = 0.05 has a positive effect on the selectivity of benzoic acid formation. A further increase of this ratio leads to a decrease of the selectivity in the case of U, Mo and mainly K oxides, while with Li, Bi, Sb, and Te oxides, the selectivity remains almost unchanged. No correlation between TPR profiles of doped catalysts and their selectivity was found. The most effective promoter of vanadia catalysts for the benzoic acid production is Sb oxide, possessing a very high selectivity at high conversion of toluene.

Title:Promoted TiO2 (Anatase)-Supported Vanadium Oxide Catalysts. TPR Study and Activity in Oxidation of Toluene
Creators:
Antol, Marcel
Prandová, Katarina
Hronec, Milan
Uncontrolled Keywords:Benzoic acid, Oxidation of toluene, TPR, V<sub>2</sub>O<sub>5</sub>, Vapor phase
Divisions:Life and Chemical Sciences > Institute of Organic Chemistry and Biochemistry > Collection of Czechoslovak Chemical Communications
Journal or Publication Title:Collection of Czechoslovak Chemical Communications
Volume:61
Number:11
Page Range:pp. 1665-1674
ISSN:0010-0765
E-ISSN:1212-6950
Publisher:Institute of Organic Chemistry and Biochemistry
Related URLs:
URLURL Type
http://dx.doi.org/10.1135/cccc19961665UNSPECIFIED
ID Code:1071
Item Type:Article
Deposited On:06 Feb 2009 17:06
Last Modified:06 Feb 2009 16:06

Citation

Antol, Marcel; Prandová, Katarina; Hronec, Milan (1996) Promoted TiO2 (Anatase)-Supported Vanadium Oxide Catalysts. TPR Study and Activity in Oxidation of Toluene. Collection of Czechoslovak Chemical Communications, 61 (11). pp. 1665-1674. ISSN 0010-0765

Repository Staff Only: item control page