| 气相中乙酸乙酯光解的光子效率:波长和催化剂的影响 |
| |
| 引用本文： | 方雪慧,赵洁,舒莉,高永,叶招莲.气相中乙酸乙酯光解的光子效率:波长和催化剂的影响[J].环境科学,2015,36(6):2010-2018. |
| |
| 作者姓名： | 方雪慧 赵洁 舒莉 高永 叶招莲 |
| |
| 作者单位： | 1. 江苏理工学院化学与环境工程学院，常州 213001; 南京信息工程大学环境科学与工程学院，江苏省大气环境监测与污染控制高技术研究重点实验室，南京 210044
2. 江苏理工学院化学与环境工程学院,常州,213001 |
| |
| 基金项目： | 国家自然科学基金项目(51108211);常州市科技计划项目(CJ20130033);江苏省大气环境监测与污染控制高技术研究重点实验室开放基金项目(KHK1409);江苏高校优势学科建设工程资助项目(PAPD) |
| |
| 摘 要： | 采用4种不同波长的准分子光源(Xe Cl*、Kr Cl*、Xe Br*和Kr Br*)降解气相的乙酸乙酯.对比了外加3种负载型光催化剂(有机膜负载Ti O2、有机膜负载石墨烯和纱网负载Ti O2)条件下乙酸乙酯的去除率,考察了光源类型、辐射功率和气体初始浓度对去除率的影响.同时,测定了不同光源的辐射光谱和辐射功率,计算了不同反应条件下的光子效率.结果表明,乙酸乙酯去除率按Kr Br*Kr Cl*Xe Cl*Xe Br*依次降低,而Xe Cl*和Kr Br*光源降解乙酸乙酯气体可以得到较高的光子效率;有机膜负载Ti O2比不加催化剂时乙酸乙酯去除率和光子效率都有所提高,但提高幅度不大.气体流速和乙酸乙酯初始浓度升高,光子效率升高.采用Kr Br*准分子灯直接光解乙酸乙酯,实验条件为:辐射功率0.76 W,乙酸乙酯初始浓度946mg·m-3,气体流速600 m L·min-1,光子效率为5.63%.
|
| 关 键 词： | 光子效率 乙酸乙酯 辐射光谱 XeCl*/KrCl*/XeBr*/KrBr* 催化剂 |
| 收稿时间： | 2014/11/27 0:00:00 |
| 修稿时间： | 2015/1/15 0:00:00 |
Photonic Efficiency of Ethyl Acetate Photolysis in Gas Phase: Dependence on Wavelength and Catalyst |
| |
| FANG Xue-hui,ZHAO Jie,SHU Li,GAO Yong and YE Zhao-lian.Photonic Efficiency of Ethyl Acetate Photolysis in Gas Phase: Dependence on Wavelength and Catalyst[J].Chinese Journal of Environmental Science,2015,36(6):2010-2018. |
| |
| Authors: | FANG Xue-hui ZHAO Jie SHU Li GAO Yong and YE Zhao-lian |
| |
| Institution: | College of Chemistry and Environmental Engineering, Jiangsu University of Technology, Changzhou 213001, China;Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, School of Environmental Sciences and Engineering, Nanjing University of Information Science and Technology, Nanjing 210044, China;College of Chemistry and Environmental Engineering, Jiangsu University of Technology, Changzhou 213001, China;College of Chemistry and Environmental Engineering, Jiangsu University of Technology, Changzhou 213001, China;College of Chemistry and Environmental Engineering, Jiangsu University of Technology, Changzhou 213001, China;College of Chemistry and Environmental Engineering, Jiangsu University of Technology, Changzhou 213001, China;Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, School of Environmental Sciences and Engineering, Nanjing University of Information Science and Technology, Nanjing 210044, China |
| |
| Abstract: | Four kinds of excilamps with different wavelengths (XeCl*, KrCl*, XeBr* and KrBr*) were used for removing ethyl acetate in gas phase. The removal efficiencies of ethyl acetate by three loaded catalysts (TiO2 loaded on organic film, graphene loaded on organic film, and TiO2 loaded on mesh) were compared, and the effects of lamp sources, irradiation power and initial concentration on the removal efficiency were also investigated. Moreover, irradiation spectra and power of light sources were determined, and photonic efficiencies under different reaction conditions were calculated. The experimental results showed that the removal efficiency of ethyl acetate decreased in the order of KrBr* >KrCl* >XeCl* >XeBr*, while the photonic efficiency seemed to be relatively high with both XeCl* and KrBr* excilamps. In the presence of the catalyst of TiO2 loaded on organic film, both the removal efficiency and the photonic efficiency were higher than those without catalyst, but the increment was not significant. The photonic efficiency increased with increasing initial concentration and gas flow rate. With KrBr* excilamp, a photonic efficiency of 5.63% was obtained when the experimental conditions were set as: irradiation power of 0.76 W, initial concentration of 946 mg·m-3, and gas flow rate of 600 mL·min-1. |
| |
| Keywords: | photonic efficiency ethyl acetate irradiation spectrum XeCl*/KrCl*/XeBr*/KrBr* catalyst |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《环境科学》浏览原始摘要信息 |
| 点击此处可从《环境科学》下载免费的PDF全文 |
|
