不同光源下TiO_2/ACF同时脱硫脱硝实验研究  

Simultaneous Desulfurization and Denitrification by TiO_2/ACF Under Different Irradiation

作　　者：韩静[1] 赵毅[1] 

机构地区：[1]华北电力大学环境科学与工程学院,保定071003

出　　处：《环境科学》2009年第4期997-1002,共6页Environmental Science

摘　　要：实验室制备了负载型二氧化钛光催化剂TiO2/ACF,利用自行设计的光催化反应器,在紫外和可见2种光源下进行了同时脱硫脱硝试验,确定了最佳的试验条件,比较了2种不同光源下的脱除效率.结果表明,烟气中氧含量、反应温度、烟气含湿量、光照强度等是影响光催化的主要因素,在紫外光源的照射下,负载型TiO2/ACF光催化剂脱除SO2和NO的效率分别达到99.7%和64.3%,在可见光源的照射下,负载型TiO2/ACF光催化剂脱除SO2和NO的效率分别达到97.5%和49.6%,5次平行试验结果表明,平行数据的标准偏差S较小.通过反应后吸收液的离子色谱分析,推测了2种不同光源下同时脱硫脱硝的反应机制.The supported TiO2 photocatalysts were prepared in laboratory, and the experiments of simultaneous desulfnrization and denitrification were carried out by self-designed photocatalysis reactor. The optimal experimental conditions were achieved, and the efficiencies of simultaneous desuffurization and denitrification under two different light sources were compared. The results show that the oxygen content of flue gas, reaction temperature, flue gas humidity and irradiation intensity are most essential factors to photocatalysis. For TiO2/ACF, the removal efficiencies of 99.7 % for SO2 and 64.3 % for NO are obtained respectively at optimal experimental conditions under UV irradiation. For TiO2 / ACF, the removal efficiencies of 97.5% for SO2 and 49.6% for NO are achieved respectively at optimal experimental conditions under the visible light irradiation. The results of five times parallel experiments indicate standard deviation S of parallel data is little. The mechanism of removal for SO2 and NO is proposed under two light sources by ion chromatography analysis of the absorption liquid.

关 键 词：TIO2/ACF 紫外光 可见光 同时脱硫脱硝 

分 类 号：X701.3[环境科学与工程—环境工程]