Wet Air Oxidation of Phenol over Ru Based Catalysts – Effects of Support

2010 ◽  
Vol 1279 ◽  
Author(s):  
A. E. Espinosa des Los Monteros ◽  
G. Lafaye ◽  
G. Torres ◽  
J. Barbier
Keyword(s):  
Ruthenium Catalysts ◽  
Industrial Processes ◽  
Catalytic Wet Air Oxidation ◽  
Doped Ceria ◽  
Air Oxidation ◽  
Wet Air Oxidation ◽  
Toc Removal ◽  
Highly Active ◽  
Elementary Analysis ◽  
Icp Analysis

AbstractCatalytic wet air oxidation (CWAO) of aqueous solutions of phenol was performed on ruthenium catalysts supported on different oxides: TiO2, ZrO2 and their doped ceria mixtures. Phenol was chosen as a model pollutant molecule because of its wide use in industrial processes. All the samples were found to be highly active for phenol oxidation and the various titania-ceria mixtures were the most efficient for total organic carbon (TOC) removal. ICP analysis of the remaining solution after reaction revealed that ruthenium has not leached. Moreover, elementary analysis of the used catalysts showed that the deposition of carbonaceous species on the surface of the catalysts was rather low and was dependent on the nature of the support.

Catalysts for Wet Air Oxidation Based on Ce-Zr-Pr-O Mixed Oxides Prepared by Soft Chemistry

2006 ◽  
Vol 45 ◽  
pp. 2089-2095
Author(s):  
Jana Mikulová ◽  
Sylvie Rossignol ◽  
Jacques Barbier Jr. ◽  
Charles Kappenstein ◽  
Daniel Duprez
Keyword(s):  
Aqueous Solution ◽  
Mixed Oxides ◽  
Platinum Catalyst ◽  
Sol Gel ◽  
Ruthenium Catalysts ◽  
Catalytic Wet Air Oxidation ◽  
Air Oxidation ◽  
Wet Air Oxidation ◽  
Soft Chemistry ◽  
Pure Ceria

Sol-gel Zr0.1Ce0.9O2 and Zr0.1(Ce0.75Pr0.25)O2 mixed oxides and coprecipitated pure ceria CeO2 displaying the fluorine type structure have been used as platinum or ruthenium catalysts’ supports for catalytic wet air oxidation (CWAO) of aqueous solution of acetic acid (78 mmol.L-1). These catalysts were prepared by conventional impregnation (5 wt-%) from platinum and ruthenium precursor salts or by exchange (~2 wt-%) in the case of ruthenium. A screening of catalysts in CWAO at 200°C under 2 MPa was performed and reveals that the best platinum catalyst is supported on pure ceria displaying large surface. For ruthenium catalysts, the highest conversion after 3 hours of reaction has been reached by the Ru/Zr-Ce-O system.

Catalytic Wet Air Oxidation of Acetic Acid on Carbon-Supported Ruthenium Catalysts

1997 ◽  
Vol 168 (1) ◽  
pp. 104-109 ◽  
Author(s):  
Pierre Gallezot ◽  
Stéphane Chaumet ◽  
Alain Perrard ◽  
Pascal Isnard
Keyword(s):  
Acetic Acid ◽  
Ruthenium Catalysts ◽  
Catalytic Wet Air Oxidation ◽  
Air Oxidation ◽  
Wet Air Oxidation

Catalytic wet air oxidation of acetic acid over different ruthenium catalysts

2008 ◽  
Vol 9 (13) ◽  
pp. 2163-2167 ◽  
Author(s):  
Jianbing Wang ◽  
Wanpeng Zhu ◽  
Xuwen He ◽  
Shaoxia Yang
Keyword(s):  
Acetic Acid ◽  
Ruthenium Catalysts ◽  
Catalytic Wet Air Oxidation ◽  
Air Oxidation ◽  
Wet Air Oxidation

Catalytic Wet Air Oxidation of Carboxylic Acids on TiO2-Supported Ruthenium Catalysts

1999 ◽  
Vol 182 (1) ◽  
pp. 129-135 ◽  
Author(s):  
Jean-Christophe Béziat ◽  
Michèle Besson ◽  
Pierre Gallezot ◽  
Sylvain Durécu
Keyword(s):  
Carboxylic Acids ◽  
Ruthenium Catalysts ◽  
Catalytic Wet Air Oxidation ◽  
Air Oxidation ◽  
Wet Air Oxidation

scholarly journals Catalytic Wet Air Oxidation Using Supported Pt and Ru Catalysts for Treatment of Distillery Wastewater (Cognac and Sugarcane Vinasses)

Energies ◽  
2019 ◽  
Vol 12 (20) ◽  
pp. 3974
Author(s):  
Thu ◽  
Besson
Keyword(s):  
Catalytic Wet Air Oxidation ◽  
Air Oxidation ◽  
Wet Air Oxidation ◽  
Batch Mode ◽  
Ru Catalysts ◽  
Toc Removal ◽  
Distillery Wastewater ◽  
High Pollution ◽  
Dark Color ◽  
Continuous Oxidation

The production of brandy from wine and bioethanol from sugarcane in distilleries generates vinasses, which are effluents that are rich in organic matter. Since they have a high pollution load characterized by high chemical and biological oxygen demands and a dark color, the depollution of these effluents is inevitable. Pt and Ru catalysts supported on titania and zirconia were explored in the catalytic wet air oxidation (CWAO) processing of cognac and sugarcane wastewaters, in batch mode and in a trickle-bed reactor, at a temperature condition of 190 °C and a pressure condition of 70 bar air. The addition of a catalyst promoted total organic carbon (TOC) abatement and the oxidation of ammonium ions formed from organic nitrogen in the effluents to dinitrogen or nitrates. The best results in terms of selectivity to N2 were obtained by using Pt catalysts; a selectivity of 92% to N2 and a TOC removal of 90% were observed in continuous oxidation of the sugarcane vinasse.

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