Macro kinetic studies for photocatalytic degradation of benzoic acid in immobilized systems

被引：80

作者：

Mehrotra, K ^{[1
]}

Yablonsky, GS ^{[1
]}

Ray, AK ^{[1
]}

机构：

[1] Natl Univ Singapore, Dept Chem & Biomol Engn, Singapore 119260, Singapore

来源：

CHEMOSPHERE | 2005年 / 60卷 / 10期

关键词：

photocatalysis; mass transfer; TiO2; optimum catalyst layer thickness; intrinsic kinetic rate constant;

D O I：

10.1016/j.chemosphere.2005.01.074

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Semiconductor photocatalytic process has been studied extensively in recent years due to its intriguing advantages in environmental remediation. In this study, a two-phase swirl-flow monolithic-type reactor is used to study the kinetics of photocatalytic degradation of benzoic acid in immobilized systems. Transport contributions into the observed degradation rates were determined when catalyst is immobilized. Intrinsic kinetic rate constants and its dependence on light intensity and catalyst layer thickness, values of adsorption. equilibrium constant, internal as well as external mass transfer parameters were determined. The simultaneous effect of catalyst loading and light intensity and optimum catalyst layer thickness were also determined experimentally. Reaction rate constants and overall observed degradation rates were compared with slurry systems. (C) 2005 Published by Elsevier Ltd.

引用

页码：1427 / 1436

页数：10

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