摘要
采用浸渍法制备了一系列V-Mo/TiO_(2)催化剂,主要考察了TiO_(2)载体的晶型结构(金红石相、锐钛矿相以及两者混合相)和平均颗粒尺寸对催化剂NH_(3)-SCR性能的影响,并利用SEM、XRD、Raman、BET、H_(2)-TPR、NH_(3)-TPD等方法对催化剂的理化性质及结构进行了表征。结果表明:平均颗粒尺寸较小的催化剂拥有高比表面积和孔容积,有利于活性组分VO_(x)的负载和沉积,从而有利于催化剂脱硝性能的提升。锐钛矿晶型载体的V-Mo/Ti-A1催化剂因拥有优异的比表面积、氧化还原能力和丰富的酸性位点而具有最佳的脱硝性能;同时混合晶型载体的V-Mo/Ti-P25催化剂在180~320℃的脱硝活性接近100%。
A series of V-Mo/TiO_(2)catalysts were prepared by the impregnation method.The influence of crystal structure(rutile phase,anatase phase and the mixed phase of the two phases)and the average particle size of the TiO_(2)support on NH_(3)-SCR performance of catalyst were mainly investigated.The physical and chemical properties and structure of the catalyst were characterized by SEM,XRD,Raman,BET,H_(2)-TPR,NH_(3)-TPD and other methods.The results show that the catalyst with smaller average particle size has a high specific surface area and pore volume,which is beneficial to the loading and deposition of the active component VO_(x),giving improvement of the denitration performance of the catalyst.The V-Mo/Ti-A1 catalyst with anatase crystal support has the best NH_(3)-SCR performance due to its excellent specific surface area,redox capacity and abundant acid sites.At the same time,the activity of the mixed crystal support V-Mo/Ti-P25 catalyst is close to 100%in the temperature range of 180—320℃.
作者
宋丽云
邓世林
周宜芸
李双叶
展宗城
李坚
何洪
SONG Liyun;DENG Shilin;ZHOU Yiyun;LI Shuangye;ZHAN Zongcheng;LI Jian;HE Hong(Key Laboratory of Beijing on Regional Air Pollution Control,Beijing University of Technology,Beijing 100124,China;Qingdao HuaShiJie Environmental Protection Technology Co.,Ltd.,Qingdao 266510,Shandong,China)
出处
《材料导报》
EI
CAS
CSCD
北大核心
2023年第6期67-72,共6页
Materials Reports
基金
国家自然科学基金青年基金(21806005)。
