Alkali resistance promotion of Ce-doped vanadium-titanic- based NH3-SCR catalysts

作     者：Zidi Yan Xiaoyan Shi Yunbo Yu Hong He 

作者机构：State Key Joint Laboratory of Environment Simulation and Pollution Control Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China University of Chinese Academy of Sciences Beijing 100049 China Center for Excellence in Regional Atmospheric Environment Institute of Urban Environment Chinese Academy of Sciences Xiamen 361021 China 

出 版 物：《Journal of Environmental Sciences》 (环境科学学报（英文版）)

年 卷 期：2018年第30卷第11期

页      面：155-161页

核心收录：

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 08[工学] 

基　　金：financially supported by the National Key research&development(R&D)Program of China(No.2017YFC0211101) the Key Project of National Natural Science Foundation(No.21637005) Science and Technology Program of Tianjin,China(No.16YFXTSF00290) 

主　　题：Selective catalytic reduction Ammonia Nitrogen oxides V2O5/WO3-TiO2 Alkali deactivation 

摘      要：The effect of K deactivation on V2OJWO3-TiO2 and Ce-doped V2O5/WO3-TiO2 catalysts in the selective catalytic reduction （SCR） of NOx by NH3 was studied. Ce-doped V2O5/WO3-TiO2 showed significantly higher resistance to K deactivation than V2O5/WO3-TiO2. Ce-doped V2O5/WO3-TiO2 with K/V = 4 （molar ratio） showed 90% NOx conversion at 350℃, whereas in this case V2O5/WO3-TiO2 showed no activity. The fresh and K-poisoned V2O5/WO3-TiO2 and Ce-doped V2O5/WO3-TiO2 catalysts were investigated by means of in situ diffuse reflectance infrared Fourier transform spectroscopy （DRIFTS）, NH3-temperature progress decomposition （NH3-TPD）, X-ray photoelectron spectroscopy （XPS） and H2-temperature program reduction （H2-TPR）. The effect of Ce doping on the improving resistance to K of V2O5/WO3- TiO2were discussed.