文献类型：期刊文献

中文题名：气固相光催化氧化反应动力学分析

英文题名：KINETIC ANALYSIS OF GAS-SOLID PHOTOCATALYTIC OXIDATION

作者：戴智铭[1];陈爱平[2];古宏晨[2];朱中南[3];顾明元[1]

机构：[1]上海交通大学金属基复合材料国家重点实验室,上海200030;[2]华东理工大学超细材料制备与应用教育部重点实验室,上海200237;[3]华东理工大学联合化学反应工程研究所,上海200237

年份：2002

卷号：53

期号：6

起止页码：578

中文期刊名：化工学报

外文期刊名：CIESC Journal

收录：CSTPCD;;EI(收录号：2002427142495);Scopus;北大核心:【北大核心2000】；CSCD:【CSCD2011_2012】；

基金：国家自然科学基金资助项目 (No .2 96 76 0 0 9;2 96 36 0 10 );中国博士后基金资助项目~~

语种：中文

中文关键词：气固相光催化氧化;反应动力学;光催化氧化;动力学模型;二氧化钛;挥发性有机物;空气污染;污染治理

外文关键词：Kinetic theory;Organic compounds;Oxidation;Photons;Titanium dioxide

摘要：对气固相光催化氧化基元反应进行了动力学分析 ,建立了简单适用的动力学模型 .理论分析表明 ,在较低的紫外光强度下 ,光催化反应速率与光强成正比 ;在较高的光强度下 ,速率与光强的平方根成正比 ;在极高光强度下 ,速率与光强无关 .因此将光催化反应简单分解为 3个速率步骤 ,即光子传递步骤、表面作用步骤、扩散步骤 .设计了新颖的气固相光催化反应器 ,采用三氯乙烯 (TCE)为模拟污染物 。
The photocatalytic oxidation of organic compounds using ultrafine semiconductor powder has been one of the most active areas for environmental problems. It is important from the viewpoint of practical applications to develop a simplified kinetic model suitable of representing the very complex mechanisms of photocatalytic oxidation. Kinetic analysis is carried out for gas-solid photocatalytic reaction, and a kinetic model is developed. The theoretical results show that the rate of gas-solid photocatalytic reaction is proportional to the light intensity (I0) under low UV light intensity, proportional to the square root of the light intensity under medium UV light intensity, and independent of I0 under extremely high UV light intensity. Photocatalytic reaction could be simply decomposed as three continuous processes as follows: photon transfer step, surface action step, and diffusion step. A novel gas-solid photocatalytic reactor is designed, and trichloroethylene is selected as the testing substance. The experimental results show that photon transfer step and surface action step are verified for gas-solid photocatalytic oxidation on nano-TiO2 powder.