Deactivation and reactivation of noble metal catalysts tested in the Catalytic Wet Air Oxidation of phenol

Abstract Ceria and doped-ceria supported platinum and ruthenium catalysts were tested at 160 °C for the Catalytic Wet Air Oxidation of phenol. This work focused on the catalyst deactivation phenomenon caused by the formation of a carbonaceous layer during the oxidation reaction. Its degradation is favoured when cerium simple oxide is used as the support phase. Ex situ oxidative treatment, with diluted oxygen, revealed to degrade efficiently adsorbed compounds, thus leading to a total recovery of activity.

[1]  R. Gläser,et al.  Hydrogenative regeneration of a Pt/La-Y zeolite catalyst deactivated in the isobutane/n-butene alkylation , 2005 .

[2]  P. Gallezot,et al.  Deactivation of metal catalysts in liquid phase organic reactions , 2003 .

[3]  Shiow-Shyung Lin,et al.  CWAO of phenol using CeO2/gamma-Al2O3 with promoter--effectiveness of promoter addition and catalyst regeneration. , 2007, Chemosphere.

[4]  J. Beziat,et al.  Catalytic wet air oxidation of carboxylic acids on TiO2-Supported ruthenium catalysts , 1999 .

[5]  I. Kozhevnikov,et al.  Coking and regeneration of H3PW12O40/SiO2 catalysts , 2001 .

[6]  F. Luck,et al.  Wet air oxidation: past, present and future , 1999 .

[7]  C. Bengoa,et al.  Bimetallic catalysts for continuous catalytic wet air oxidation of phenol. , 1999, Journal of hazardous materials.

[8]  Lixiong Li,et al.  Generalized kinetic model for wet oxidation of organic compounds , 1991 .

[9]  G. Hutchings,et al.  Methanol and dimethyl ether conversion to hydrocarbons using tungsten trioxide/alumina as catalyst.A study of Catalyst reactivationA study of catalyst reactivation , 1988 .

[10]  D. Duprez,et al.  Ruthenium and platinum catalysts supported on Ce, Zr, Pr-O mixed oxides prepared by soft chemistry for acetic acid wet air oxidation , 2007 .

[11]  I. J. Harris,et al.  Mechanism of the oxidation of aqueous phenol with dissolved oxygen , 1984 .

[12]  J. Delgado,et al.  The role of the carbonaceous deposits in the Catalytic Wet Oxidation (CWO) of phenol , 2006 .

[13]  Jyeshtharaj B. Joshi,et al.  Wet air oxidation , 1995 .

[14]  J. Levec,et al.  Catalytic oxidation of organics in aqueous solutions. I : Kinetics of phenol oxidation , 1992 .

[15]  D. Duprez,et al.  Deactivation phenomena during catalytic wet air oxidation (CWAO) of phenol over platinum catalysts supported on ceria and ceria–zirconia mixed oxides , 2008 .

[16]  R. Chirone,et al.  Regeneration of spent catalysts in oxy-combustion atmosphere , 2010 .

[17]  P. Dufresne.  Hydroprocessing catalysts regeneration and recycling , 2007 .

[18]  M. Boaro,et al.  The utilization of ceria in industrial catalysis , 1999 .

[19]  F. Larachi,et al.  Catalytic oxidation of aqueous phenolic solutions catalyst deactivation and kinetics , 1999 .

[20]  Faïçal Larachi,et al.  Wet Oxidation of Phenol Catalyzed by Unpromoted and Platinum-Promoted Manganese/Cerium Oxide , 1998 .

[21]  Felix Garcia-Ochoa,et al.  Study of the copper leaching in the wet oxidation of phenol with CuO-based catalysts: Causes and effects , 2005 .

[22]  Recovery of alkylation activity in deactivated USY catalyst using supercritical fluids: a comparison of light hydrocarbons , 2004 .

[23]  A. Martorana,et al.  Phase Analysis and Oxygen Storage Capacity of Ceria-Lanthana-Based TWC Promoters Prepared by Sol+Gel Routes , 2002 .

[24]  Sang-Kyung Kim,et al.  Nature of carbonaceous deposits on the alumina supported transition metal oxide catalysts in the wet air oxidation of phenol , 2005 .

[25]  Jianbing Wang,et al.  Catalytic wet air oxidation of phenol with pelletized ruthenium catalysts , 2008 .

[26]  J. Casas,et al.  Surface modification of carbon-supported iron catalyst during the wet air oxidation of phenol : Influence on activity, selectivity and stability , 2008 .