Kinetics of heterogeneous catalytic ozone decomposition in water on an activated carbon

被引：156

作者：

Beltrán, FJ ^{[1
]}

Rivas, J ^{[1
]}

Alvarez, P ^{[1
]}

Montero-de-Espinosa, R ^{[1
]}

机构：

[1] Univ Extremadura, Dept Ingn Quim & Energet, E-06071 Badajoz, Spain

来源：

OZONE-SCIENCE & ENGINEERING | 2002年 / 24卷 / 04期

关键词：

ozone; activated carbon; catalytic ozone decomposition; kinetics;

D O I：

10.1080/01919510208901614

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Ozone decomposition in water in the presence of an activated carbon has been studied. Variables investigated were agitation speed, carbon particle size, temperature and pH. In all cases, the presence of activated carbon improved the ozone decomposition rate. Between pH 2 and 7 the ozone decomposition rate due to both the homogeneous and heterogeneous mechanisms hardly varied while a significant increase was noticed with increasing pH. A kinetic study based on a Langmuir-Hinselwood type mechanism for the heterogeneous surface reaction was undertaken. According to this mechanism the heterogeneous ozone decomposition kinetics can be simplified to follow a first order process. Fit of experimental results to the kinetic equations derived from the mechanism allowed for the determination of the apparent first order rate constants of the ozone surface heterogeneous reaction and adsorption equilibrium constants.

引用

页码：227 / 237

页数：11

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