利用传质作用提高污染物HCHO的光催化反应速率  

Enhancement of Photocatalytic Reaction Rate of HCHO Under the Action of Mass Transfer

作　　者：鹿院卫[1] 李文彩[1] 盛建平[1] 王伟[1] 马重芳[1] 

机构地区：[1]北京工业大学环境与能源工程学院传热强化与过程节能教育部重点实验室,北京100022

出　　处：《北京工业大学学报》2007年第8期858-863,共6页Journal of Beijing University of Technology

基　　金：国家自然科学基金(50476036);'传热强化与过程节能'教育部重点实验室开放基金.

摘　　要：为了提高室内污染物在低浓度条件下的光催化反应速率,采用将光催化技术与活性炭吸附技术相结合的方法,在解决催化剂TiO_2膜牢固性和活性的基础上,利用活性炭吸附功能,强化污染物HCHO在低浓度条件下向催化剂表面的传质,提高其在催化剂TiO_2表面的局部浓度.实验结果表明,该方法一方面提高了室内污染物HCHO的光催化反应速率,另一方面催化剂TiO_2表面HCHO去除延缓了活性碳的吸附饱和,提高了催化剂TiO_2膜的使用寿命.In order to enhance the photocatalytic reaction rate of formaldehyde, the photocatalytic technology was combined with active carbon adsorption technology. Based on the fastness and the higher activity of TiO2 film, the transfer of HCHO to the surface TiO2 film was enhanced for the adsorption of active carbon and the local HCHO concentration on the surface of TiO2 film was increased. The experimental results shown that the photocatalytic reaction rate of HCHO was improved and the adsorption saturation of active carbon was delayed, so the life of TiO2 film was prolonged. From above results it can conclude that the combination of activated carbon and photocatalytic technology is an application future of photocatalytic technology.

关 键 词：传质 光催化 空气净化 

分 类 号：TU838.8[建筑科学—供热、供燃气、通风及空调工程]