Ceria promoted γ-Al2O3 supported platinum catalyst for catalytic wet air oxidation of oxalic acid: kinetics and catalyst deactivation

RSC Advances ◽  
2014 ◽  
Vol 4 (100) ◽  
pp. 56838-56847 ◽  
Author(s):  
Shyamal Roy ◽  
Anil Kumar Saroha
Keyword(s):  
Oxalic Acid ◽  
Catalyst Deactivation ◽  
Platinum Catalyst ◽  
Platinum Catalysts ◽  
Catalytic Wet Air Oxidation ◽  
Air Oxidation ◽  
Wet Air Oxidation ◽  
Supported Platinum ◽  
Supported Platinum Catalysts ◽  
Supported Platinum Catalyst

Alumina-supported platinum catalysts were prepared for catalytic wet air oxidation of oxalic acid.

Kinetic modeling for wet air oxidation of formic acid on a carbon supported platinum catalyst

1997 ◽  
Vol 165 (1-2) ◽  
pp. 499-509 ◽  
Author(s):  
J.M.A. Harmsen ◽  
L. Jelemensky ◽  
P.J.M. Van Andel-Scheffer ◽  
B.F.M. Kuster ◽  
G.B. Marin
Keyword(s):  
Formic Acid ◽  
Kinetic Modeling ◽  
Platinum Catalyst ◽  
Air Oxidation ◽  
Wet Air Oxidation ◽  
Supported Platinum ◽  
Supported Platinum Catalyst

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 Oxalic Acid at Atmospheric Pressure

2007 ◽  
Vol 5 (1) ◽  
Author(s):  
Gonul Gunduz ◽  
Meral Dukkanci
Keyword(s):  
Oxalic Acid ◽  
Atmospheric Pressure ◽  
Free Radical Oxidation ◽  
Acid Oxidation ◽  
Catalytic Wet Air Oxidation ◽  
Air Oxidation ◽  
Wet Air Oxidation ◽  
Radical Oxidation ◽  
Stirred Reactor ◽  
Mass Loads

Catalytic wet air oxidation of oxalic acid in aqueous solution was investigated in a stirred reactor over a Pt (0.7% in wt)/Al2O3 catalyst at atmospheric pressure, in a concentration range of oxalic acid of 500-3000 ppm, and at a temperature range of 313-353 K. The conversions obtained after 5 h were 28.96 %, 45.98 % and 30.74 % for initial concentrations of 500, 1500, 3000 ppm, respectively. A rate equation of oxalic acid oxidation, in mol.h-1.g-1Pt was determined from measurements of initial rates, at different initial concentrations of oxalic acid, temperatures and catalyst mass loads. The activation energy for oxalic acid conversion was found to be 24.6 kJ mol-1.The heterogeneous catalyzed free-radical oxidation of oxalic acid was discussed.

Platinum catalysts supported on MWNT for catalytic wet air oxidation of nitrogen containing compounds

2005 ◽  
Vol 102-103 ◽  
pp. 101-109 ◽  
Author(s):  
J. Garcia ◽  
H.T. Gomes ◽  
P. Serp ◽  
P. Kalck ◽  
J.L. Figueiredo ◽  
...  
Keyword(s):  
Platinum Catalysts ◽  
Catalytic Wet Air Oxidation ◽  
Air Oxidation ◽  
Wet Air Oxidation ◽  
Nitrogen Containing Compounds
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