钒基催化剂同步去除燃煤烟气中甲苯与NO_(x)研究  

Synergistic removal of toluene and NO_(x) on vanadium-based catalyst

作　　者：张益兰 肖高飞 李剑晗 杜玥莹 付名利 胡芸 ZHANG Yi-lan;XIAO Gao-fei;LI Jiang-han;DU Yue-ying;FU Ming-li;HU Yun(South China University of Technology,Guangzhou 510006,China;Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control,Guangzhou 510006,China;Guangdong Provincial Engineering and Technology Research Centre for Environmental Risk Prevention and Emergency Disposal,Guangzhou 510006,China)

机构地区：[1]华南理工大学环境与能源学院,广东广州510006 [2]广东省大气环境与污染控制重点实验室,广东广州510006 [3]广东省环境风险防范与应急处置工程技术研究中心,广东广州510006

出　　处：《中国环境科学》2021年第8期3546-3554,共9页China Environmental Science

基　　金：国家重点研发计划项目(2018YFB0605200);广州市科技计划项目(201804020026)。

摘　　要：采用不同工艺制备V_(2)O_(5)-WO_(3)-MoO_(x)/TiO_(2)堇青石整体式催化剂,以甲苯和NO为探针分子,考察了Mo的负载量、涂覆方法、粘结剂的种类等制备工艺对整体式催化剂性能的影响,用XRD、SEM-EDS、FT-IR、BET等技术对催化剂进行了表征分析.结果表明,采用涂敷法,以添加量为1%的甲基纤维素为粘结剂所制备的V1W6Mo3/TiO_(2)堇青石蜂窝陶瓷整体式催化剂具有最优活性和稳定性(T_(90)为307℃,负载率为28.26%,脱落率为6.81%),在燃煤烟气中具有优异的同步去除VOCs与NO性能,甲苯去除率可达99%,NO去除率为100%,N_(2)选择性为99%.XRD、SEM-EDS表明V、W、Mo活性组分分布均匀且高度分散.FT-IR证明添加甲基纤维素的整体式催化剂具有优异的抗硫性能.V_(2)O_(5)-WO_(3)-MoO_(x)/TiO_(2) cordierite monolithic catalyst was prepared by different synthetic methods.Using toluene and NO as probe molecules,the effects of Mo loading,coating method and binder type on the performance of monolithic catalyst were investigated.XRD,SEM-EDS,FT-IR and BET techniques were used to characterize the catalysts.The results showed that V1W6MO3/TiO_(2) cordierite honeycomb ceramic monolithic catalyst prepared by coating method with 1% methyl cellulose as binder had the highest activity and stability(T90=307℃,load rate=28.26%,shedding rate=6.81%),and had excellent performance of simultaneous removal of VOCs and NO in the flue gas of coal burning(toluene removal rate=99%,NO removal rate=100%,N_(2) selectivity=99%).XRD and SEM-EDS showed that the active components of V,W and Mo were evenly distributed and highly dispersed.FT-IR showed that the monolithic catalyst with methyl cellulose added had excellent SO_(2) resistance performance.

关 键 词：燃煤烟气 催化氧化 整体式催化剂 VOCs与NO_(x)同步去除 

分 类 号：X511[环境科学与工程—环境工程]