Highly active ruthenium catalysts supported on nanostructured titanates for application in catalytic wet air oxidation of p-hydroxybenzoic acid

Mohamed Triki; Hafedh Kochkar; Gilles Berhault; Abdelhamid Ghorbel

doi:10.1007/s11144-010-0219-6

Reaction Kinetics, Mechanisms and Catalysis

Volume/Issue:: Volume 101: Issue 2

Highly active ruthenium catalysts supported on nanostructured titanates for application in catalytic wet air oxidation of p-hydroxybenzoic acid

Authors:

Mohamed Triki

Mohamed Triki Département de Chimie, Faculté des Sciences de Tunis, Laboratoire de Chimie des Matériaux et Catalyse, 2092 Tunis, Tunisie

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Hafedh Kochkar

Hafedh Kochkar

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Gilles Berhault

Gilles Berhault Institut de Recherches sur la Catalyse et l’Environnement de Lyon, UMR 5256 CNRS-Université de Lyon, 69100 Villeurbanne, France

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, and

Abdelhamid Ghorbel

Abdelhamid Ghorbel Département de Chimie, Faculté des Sciences de Tunis, Laboratoire de Chimie des Matériaux et Catalyse, 2092 Tunis, Tunisie

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Pages:: 377–386

Online Publication Date:: 16 Jul 2010

Publication Date:: 01 Dec 2010

Article Category:: Research Article

DOI:: https://doi.org/10.1007/s11144-010-0219-6

Keywords:: Titanate; Nanotubes; Nanowires; Ruthenium; Catalytic wet air oxidation

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Abstract

Ruthenium catalysts have been prepared by incipient wetness impregnation of ruthenium(III) nitrosylnitrate, Ru(NO)(NO₃)₃ onto high surface area titanate supports obtained by hydrothermal treatment of TiO₂ P25 in concentrated alkaline solutions. These Ru-containing catalysts were evaluated in the catalytic wet air oxidation of p-hydroxybenzoic acid (p-HBZ), a model compound representative of phenolic pollutants present in olive mills wastewaters, at 413 K and 50 bars of air. Two different titanates morphologies were tested as supports for this reaction: hydrogenotitanate nanotubes (HNT) obtained with concentrated NaOH and hydrogenotitanate nanowires (HNW) formed in the presence of highly concentrated KOH solution. The HNT and HNW supports and their corresponding supported Ru catalysts were characterized by means of N₂ adsorption–desorption, XRD, UV and TEM analyses. Results showed that the use of high surface area titanate supports led to catalysts much more active than similar Ru catalysts supported on conventional TiO₂ supports.

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Reaction Kinetics, Mechanisms and Catalysis

Print ISSN:: 1878-5190

Online ISSN:: 1878-5204

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Reaction Kinetics, Mechanisms and Catalysis
Language	English
Size	B5
Year of Foundation	1974
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ISSN	1878-5190 (Print)
ISSN	1878-5204 (Online)