双载体催化剂协同DBD氧化吸附态乙酸乙酯  

Oxidation of adsorbed ethyl acetate by dielectric barrier discharge coupled with bi⁃support catalysts

作　　者：杨全[1,2] 秦彩虹 黄家玉[3] 白文文 郑洋[1] 郭孟柯 YANG Quan;QIN Caihong;HUANG Jiayu;BAI Wenwen;ZHENG Yang;GUO Mengke(School of Environment&Municipal Engineering,Xi′an University of Architecture&Technology,Xi′an 710055;Key Laboratory of Northwest of Water Resources and Environmental Ecology,Ministry of Education,Xi′an 710055;Research Center of Air Pollution Control Technology,Chinese Research Academy of Environmental Sciences,Beijing 100012)

机构地区：[1]西安建筑科技大学环境与市政工程学院,西安710055 [2]西北水资源与环境生态教育部重点实验室,西安710055 [3]中国环境科学研究院大气污染控制技术研究中心,北京100012

出　　处：《环境科学学报》2020年第5期1650-1655,共6页Acta Scientiae Circumstantiae

基　　金：陕西省教育厅2019年度专向研究计划(No.19JK0479);中国博士后科学基金第61批面上项目(No.2017M613289XB)。

摘　　要：以13X为载体,采用等体积浸渍法制备分别负载Mn、Mo和Fe的金属氧化物的催化剂,并与载体γ⁃Al2O3混合作为介质阻挡放电(DBD)的填料降解吸附态乙酸乙酯.实验结果表明,Mn/13X的乙酸乙酯氧化降解效果优于Mo/13X和Fe/13X,放电120 min时,其矿化率可达61.5%,CO2选择性为98.2%,其副产物O3和N2O的排放浓度也最低.在Mn/13X中加入γ⁃Al2O3,当两者质量比例为1∶1时,由于双载体间的协同作用,吸附态乙酸乙酯的矿化率可进一步提高至64.4%.最后,结合反应器出口气体中和催化剂表面的中间有机副产物,分析了吸附态乙酸乙酯在DBD中的降解机理.Mn,Mo and Fe loaded catalysts were prepared by wet impregnation method with 13X as the carrier.Then they were mixed withγ⁃Al2O3 as the filler of dielectric barrier discharge(DBD)reactor for the degradation of adsorbed ethyl acetate.The experimental results showed that Mn/13X had better ethyl acetate oxidation performance than Mo/13X and Fe/13X.When discharging for 120 min,the mineralization rate of Mn/13X was 61.5%with CO2 selectivity of 98.2%.The emissions of byproduct O3 and N2 O of Mn/13X were the lowest among the tested catalysts.Whenγ⁃Al2O3 was added into Mn/13X with the mass ratio of 1∶1,the mineralization rate of ethyl acetate further increased to 64.4%due to the synergistic effect between carriers.Finally,the degradation mechanism of adsorbed ethyl acetate in DBD was analyzed basing on the intermediate organic by⁃products in the gas at the outlet of the reactor and on the surface of catalysts.

关 键 词：DBD 双载体催化剂 乙酸乙酯 机理 

分 类 号：X701[环境科学与工程—环境工程] X131