摘要
采用玻璃纤维布作为载体制备负载型纳米TiO2光催化剂,对连续流中光催化氧化降解气相苯的过程进行了分析.考察苯的进口质量浓度、相对湿度、氧气体积分数对苯的光催化降解效率的影响,结果表明,相对湿度和氧气体积分数是影响气相苯降解的主要影响因素.利用L-H模型以及水蒸气和氧气质量浓度对表观速率常数的影响,计算得到苯、水分子和氧气的吸附平衡常数分别为:K=6.5×10-3m3/mg,KW=2.2×10-4m3/mg,KO=2.35×10-5m3/mg.
The process of photocatalytic oxidation of benzene in gas-phase in the continuous flow reactor over nanosized TiO2 supported on the woven glass fabric was studied. The effects of initial benzene concentration, relative humidity and oxygen molar fraction on the photocatalytic decomposition rate of benzene were investigated. The results showed that reactive humidity and molar fraction of oxygen were the main influence factors. The effect of water vapour, oxygen concentration on the apparent reaction rate constant was investigated based on L-H model. The calculated adsorption rate coefficient of benzene, water, oxygen were K =6. 5 ×10^-3 m^3/mg, gw = 2. 2 × 10^-4 m^3/mg, go =2.35 × 10^-5 m^3/mg respectively.
出处
《江南大学学报（自然科学版）》
CAS
2008年第2期239-243,共5页
Joural of Jiangnan University (Natural Science Edition)
基金
国家"十一五"科技支撑计划项目(2006BAJ02A08)
浙江省自然科学基金项目(Y505096)
教育部"新世纪优秀人才支持计划"项目(NCET-04-0549)
杭州市科技发展计划项目(20061133B27)
关键词
气相苯
光催化
TIO2
光催化剂
gaseous benzene
photocatalytic oxidation
TiO2
photocatalysts
