摘要
以TiO2(P25)为催化剂,研究了玻璃平板反应器在室内典型冬季工况紫外光催化降解甲苯的特性。甲苯的初试浓度为0~14mg/m3。实验发现,随着浓度的增大,甲苯的降解速率先增加,在达到一个最大值后急剧减小。一个考虑了催化剂钝化的动力学模型能很好的解释这种现象。文章提出了钝化区、最大反应速率、抑止浓度等概念,对光催化型净化器的设计与选用有非常重要的指导意义。
A glass-plate reactor coated with Degussa TiO2 (P25) was used to investigate the performance of ultraviolet photocatalytic oxidation (UV-PCO) of toluene at typical ambient temperature and moisture of winter. The concentration of toluene at reactor inlet ranged from 0 to 14mg/m3. Under these conditions,the degradation rate of toluene was rising with the concentration increasing at first,but began to decline when it reached a maximum value. To describe this issue,a new kinetic model that fit well with the exp...
出处
《环境科学与技术》
CAS
CSCD
北大核心
2010年第9期113-115,154,共4页
Environmental Science & Technology
基金
国家十一五科技支撑计划(2006BAJ02A08)
关键词
光催化
甲苯
钝化
动力学模型
室内空气
photocatalytic oxidation
toluene
deactivation
kinetic model
indoor air