Overall rate of aqueous-phase catalytic oxidation of phenol:: pH and catalyst loading influences

被引：36

作者：

Santos, A ^{[1
]}

Barroso, E ^{[1
]}

García-Ochoa, F ^{[1
]}

机构：

[1] Univ Complutense, Fac Ciencias Quim, Dpto Ingn Quim, E-28040 Madrid, Spain

来源：

CATALYSIS TODAY | 1999年 / 48卷 / 1-4期

关键词：

copper catalyst; phenol oxidation; mineralization; catalyst/liquid ratio;

D O I：

10.1016/S0920-5861(98)00364-2

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

The catalytic oxidation of phenol in aqueous-phase has been investigated using a commercial catalyst CuO-2(CuO). Cr2O3-CrO4Ba-Al2O3 at 400 K and an oxygen pressure of 8 atm, changing the pH and catalyst concentration. The phenol conversion, TOC consumption, the intermediates and the pH variation with time have been determined. An irreversible bonding of phenol on the catalyst surface has been found as a previous step to the phenol oxidation reaction. An overall pseudo-first order kinetic constant has been calculated for phenol conversion and values obtained at basic pH are lower than those calculated for acid pH media. An important homogeneous contribution for the phenol oxidation rate was found. However, the intermediates mineralization is notably influenced by the catalyst load. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：109 / 117

页数：9

共 12 条

[1] CATALYTIC SUPERCRITICAL WATER OXIDATION - PHENOL CONVERSION AND PRODUCT SELECTIVITY [J].

DING, ZY ;

AKI, SNVK ;

ABRAHAM, MA .

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 1995, 29 (11) :2748-2753

[2] A REACTION NETWORK MODEL FOR PHENOL OXIDATION IN SUPERCRITICAL WATER [J].

GOPALAN, S ;

SAVAGE, PE .

AICHE JOURNAL, 1995, 41 (08) :1864-1873

[3] CATALYTIC-OXIDATION OF TOXIC ORGANICS IN AQUEOUS-SOLUTION [J].

LEVEC, J .

APPLIED CATALYSIS, 1990, 63 (01) :L1-L5

[4] CATALYTIC-OXIDATION OF AQUEOUS-SOLUTIONS OF ORGANICS - AN EFFECTIVE METHOD FOR REMOVAL OF TOXIC POLLUTANTS FROM WASTE-WATERS [J].

LEVEC, J ;

PINTAR, A .

CATALYSIS TODAY, 1995, 24 (1-2) :51-58

[5]

Lin SH, 1996, APPL CATAL B-ENVIRON, V9, P133

[6] Catalytic wet oxidation of p-coumaric acid: Partial oxidation intermediates, reaction pathways and catalyst leaching [J].

Mantzavinos, D ;

Hellenbrand, R ;

Livingston, AG ;

Metcalfe, IS .

APPLIED CATALYSIS B-ENVIRONMENTAL, 1996, 7 (3-4) :379-396

[7] LIQUID-PHASE OXIDATION OF PHENOL IN A ROTATING CATALYTIC BASKET REACTOR [J].

OHTA, H ;

GOTO, S ;

TESHIMA, H .

INDUSTRIAL & ENGINEERING CHEMISTRY FUNDAMENTALS, 1980, 19 (02) :180-185

[8] CATALYTIC LIQUID-PHASE OXIDATION OF PHENOL AQUEOUS-SOLUTIONS - A KINETIC INVESTIGATION [J].

PINTAR, A ;

LEVEC, J .

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 1994, 33 (12) :3070-3077

[9] CATALYTIC LIQUID-PHASE OXIDATION OF REFRACTORY ORGANICS IN WASTE-WATER [J].

PINTAR, A ;

LEVEC, J .

CHEMICAL ENGINEERING SCIENCE, 1992, 47 (9-11) :2395-2400

[10] INVOLVEMENT OF FREE-RADICALS IN AQUEOUS-PHASE CATALYTIC-OXIDATION OF PHENOL OVER COPPER OXIDE [J].

SADANA, A ;

KATZER, JR .

JOURNAL OF CATALYSIS, 1974, 35 (01) :140-152

← 1 2 →