负载型纳米二氧化钛光催化技术处理含乙硫醇废气工艺探讨  

Study on the treatment of ethyl mercaptan in exhaust gas by coated nano-tiO2 photocatalytic technology

作　　者：刘楠 李营营 杨海龙 邓瑞红 刘杨 赵继红 LIU Nan;LI Yingying;YANG Hailong;DENG Ruihong;LIU Yang;ZHAO Jihong(Henan Collaborative Innovation Center for Environmental Pollution Control and Ecological Restoration,College of Material and Chemical Engineering,Zhengzhou University of Light Industry,Zhengzhou 450001,P.R.China;Wulongkou Water Branch,Zhongyuan Environmental Protection Co.,Ltd.,Zhengzhou 450001,P.R.China;Xuchang University,Xuchang 461000,Henan,P.R.China)

机构地区：[1]郑州轻工业学院材料与化学工程学院环境污染治理与生态修复河南省协同创新中心,郑州450001 [2]中原环保五龙口水务分公司,郑州450001 [3]许昌学院,河南许昌461000

出　　处：《重庆大学学报（自然科学版）》2019年第10期22-30,共9页Journal of Chongqing University

基　　金：河南省自然科学基金资助项目(182300410102);国家科技支撑计划资助项目(2014BAC22C06);河南省科技攻关资助项目(162102210055);河南省科技厅院所专项资助项目(2014F10010)~~

摘　　要：基于负载型纳米二氧化钛光催化氧化技术处理难降解乙硫醇为目标污染物,为乙硫醇等恶臭气体的无害化处理探讨可行且高效的技术工艺。在450℃下焙烧得到活性较高的锐钛矿型二氧化钛催化剂,考察不同气体流量、光能密度、湿度、O2体积分数等参数下反应器的降解效率,得到体系最佳运行条件。结果表明:乙硫醇的降解效果与废气流量呈负相关趋势,在废气流量为0.3L/min、湿度为45%、O2体积分数为30%时,乙硫醇降解效率最佳;乙硫醇降解效率随光能密度的增大而逐渐上升,考虑能耗问题,将光能密度控制在7W/cm^2时乙硫醇的综合降解效果可达最优。通过显著相关性分析发现,乙硫醇进气质量浓度、光能密度和乙硫醇降解效率之间呈显著正相关关系,废气流量与乙硫醇降解效率之间呈显著负相关关系。With refractory ethanethiol being the target pollutant,the photocatalytic oxidation of the supported nano titanium dioxide is introduced as the treatment technology.Aanatase-type titanium dioxide catalyst with high activity was obtained by calcination at 450℃.The degradation efficiency was investigated under different gas flow rate,light energy density,humidity and oxygen concentration to get the best operating condition of the system.The results showed that the degradation effect of ethylene thiol was negative correlated with the discharge of waste gas.When exhaust gas flow was 0.3L/min,humidity was 45%and oxygen concentration was 30%,ethyl mercaptan has the best degradation effect.The degradation rate of ethylthiol increases gradually with the increase of light energy density.Taking energy consumption into consideration,the best degradation effect of ethyl mercaptan was achieved when the light energy density was controlled at 7 W/cm^2.Through significant correlation analysis,we found that there was a significant positive correlation between the concentration of ethyl mercaptan,the density of light energy and the degradation efficiency of ethanethiol,while there was a significant negative correlation between the flow rate of exhaust gas and the degradation efficiency of ethanethiol.

关 键 词：乙硫醇 纳米二氧化钛 降解效率 

分 类 号：X701[环境科学与工程—环境工程]