The role of the carbonaceous deposits in the Catalytic Wet Oxidation (CWO) of phenol

被引：36

作者：

Delgado, J. J. ^{[1
]}

Perez-Omil, J. A. ^{[1
]}

Rodriguez-Izquierdo, J. M. ^{[1
]}

Cauqui, M. A. ^{[1
]}

机构：

[1] Univ Cadiz, Fac Ciencias Mar, Dept Ciencias Mat & Ingn Met & Quim Inorgan, E-11510 Puerto Real, Cadiz, Spain

来源：

CATALYSIS COMMUNICATIONS | 2006年 / 7卷 / 09期

关键词：

phenol; Catalytic Wet Oxidation; wastewater; Ce-Mn composites; carbonaceous deposit; deactivation; mechanism; TEM;

D O I：

10.1016/j.catcom.2006.02.003

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 [物理化学]; 081704 [应用化学];

摘要：

Different Ce-Mn composites have been used as catalyst for the Catalytic Wet Oxidation (CWO) of Phenol under different operating conditions in the range of 80-160 degrees C and 0.5-2 MPa P-O2. High mineralization performances were observed by operating at moderate temperatures (130-160 degrees C) and oxygen partial pressures (1-2 MPa). The mechanism proposed for the mineralization process includes the initial polymerization of phenol with the rapid formation of a carbonaceous deposit on the catalytic surface (favoured by the presence of Mn), which is later oxidized to CO2 and H2O (the richest Cc catalysts being more active in this process). At milder conditions, i.e. temperatures below 110 degrees C, no mineralization was observed and only the first process operates producing the irreversible polymer deposition until the total activity loss of the catalyst for phenol elimination. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：639 / 643

页数：5

共 18 条

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