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化学进展 2009, Vol. 21 Issue (10): 2037-2043 前一篇   后一篇

• 综述与评论 •

挥发性有机污染物光催化氧化动力学中的L-H模型*

刘静1;王梓萌1;沈建东1,2;张士成1**;陈建民1**   

  1. （1.复旦大学环境科学与工程系    上海200433；2.杭州市环境监测中心站    杭州310000）
  • 收稿日期:2008-12-01 修回日期:2009-02-16 出版日期:2009-10-24 发布日期:2009-10-09
  • 通讯作者: 张士成 E-mail:zhangsc@fudan.edu.cn
  • 基金资助:

    省级资助

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Langmuir-Hinshelwood Model of Photocatalytic Oxidation Kinetics of Volatile Organic Pollutants

Liu Jing1; Wang Zimeng1; Shen Jiandong1, 2; Zhang Shicheng 1** ; Chen Jianmin1**   

  1. (1. Department of Environmental Science and Engineering, Fudan University, Shanghai, 200433;
    2. Hangzhou Environmental Monitoring Centre, Hangzhou 310000, China)
  • Received:2008-12-01 Revised:2009-02-16 Online:2009-10-24 Published:2009-10-09
  • Contact: Zhang Shicheng E-mail:zhangsc@fudan.edu.cn

挥发性有机污染物的光催化氧化（PCO）过程反应动力学多数符合L-H模型。本文综述了近年来在L-H模型基础上提出的改进的动力学模型的研究进展。除流速、污染物的初始浓度外，光强度、相对湿度、反应器系数、对流传质系数、电子-空穴对的结合速率以及中间产物等因素对PCO反应同样起不可忽略的作用；分析了通过反应动力学模型判断光催化反应速率控制步骤的方法；总结了适用于L-H模型的实验条件如反应器类型、催化剂、光源、污染物类型等。

关键词： 挥发性有机污染物, 光催化氧化, 动力学模型

Most photocatalytic oxidation (PCO) kinetics of volatile organic pollutants fit the L-H model. In this paper, we reviewed the recent research process in proposed kinetic models based on L-H models. However, besides the flow rate and the initial concentration, light intensity, relative humidity, the photoreactor-related coefficient, the convective mass transfer coefficients, electron-hole pair recombination rate and intermediate by-production also play an important role in the photocatalytic oxidation reactions. Methods to identify the rate-determining step using those kinetic models were then discussed. The applicability of L-H model under various experimental conditions, such as photoreactor parameters, light source and the properties of VOCs and photocatalyst, was also investigated.

Contents
1 Introduction
2 Research in Langmuir-Hinshelwood model of photocatalytic oxidation kinetics of volatile organic pollutants
2.1 Langmuir-Hinshelwood model
2.2 The modified Langmuir-Hinshelwood models
2.3 Methods to identify the rate-determining step
2.4 Other methods of investigation on the photocatalytic oxidation kinetics
3 Conclusion

Key words: volatile organic pollutants, photocatalytic oxidation, kinetic models

中图分类号: 

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