﻿ 循环流动固定床光催化反应器动力学数学模拟

### 循环流动固定床光催化反应器动力学数学模拟

1. 中山大学化学与化学工程学院,　中山大学超快激光光谱国家重点实验室,广州　510275;　广州环境保护科学研究所,广州　510300
• 收稿日期:2001-04-29 修回日期:2001-07-27 发布日期:2001-11-15
• 通讯作者: 李玉光 E-mail:ceslyg@zsu.edu.cn

### Kinetics Modeling Study on Continuous Circulative Flow Immobilized Photocatalytic Reactor

Fan Shan-Hu;Yu Xiang-Yang;Zhan She-Xia;Chen Liu-Ping;Gu Xi-Lan;Li Yu-Guang;Shi Zhong-Bing

1. College of Chemistry and Chemical Engineering,Zhongshan University,State Key Laboratory of Ultrafast Laser Spectroscopy Zhongshan University,Guangzhou　510275;Research Institute of Environmental Protection Sciences of Guangzhou,Guangzhou　510300
• Received:2001-04-29 Revised:2001-07-27 Published:2001-11-15
• Contact: Li Yu-Guang E-mail:ceslyg@zsu.edu.cn

Abstract: The kinetic process in a tubular continuous-flow photo-reactor equiped with titanium dioxide immobilized on glass fiber-net has been studied by using methyl orange as a model reactant.The process has been described carefully,and modeled by using dynamic partial differential equation.Since the solution of the equation was complicated,the numerical solution has been undertaken by using a fourth-order Runge-Kutta scheme.The results show that the mathematical simulated values are consistent with the experimental data.Under the condition of different treated reactant amount the actual reaction rate constant k is approximately identical,but the apparent reaction rate constant kapp decreases with increasing treatment of reactant amount.The initial concentration has a great influence upon the rate constant.Below 15 μmol•L－1 of the initial concentration the rate constant tends to be a constant.In the range of 15～150 μmol•L－1,the influence of the initial concentration on the reaction rate constant can be expressed as:lnk=－0.48lnc0＋1.42.The dependence of reaction rate constant on UV irradiation intensity is k∝I 0.5.The pH of initial solution is an important factor in the photocatalysis reaction.