Preparation and Characterization of MnOX-CeO2/TiO2 Catalytic Material for SCR of NOx with NH3 at Low Temperature
The MnOX-CeO2/TiO2 catalytic material for low temperature SCR of NOX with NH3 was prepared using aqueous solutions of three manganese salt as well as cerous nitrate and TiO2(anatase) powder by impregnation method.The properties of the catalytic materials were investigated by TG-DSC,XRF,XRD,XPS,BET and SEM.And the low temperature catalytic activity of the catalytic materials was measured.The results showed that,when manganese nitrate and manganese chloride and manganese acetate were used as precursors,respectively,the primary phases of catalytic materials were MnOx/MnO2,MnO2/Mn8O10Cl3 and Mn3O4/MnO2,the surface Mn/Ti molar ratio were 0.68,0.19 and 0.88,the surface area were 45.1m2/g,25.1 m2/g and 48.6 m2/g,respectively.The optimum NOX conversion rate of catalytic material from manganese nitrate precursor and manganese chloride precursor and manganese acetate precursor were 97.9% at 483K,86.6% at 513K,97.2% at 423K,respectively.Consequently,the higher low-temperature activity of MnOX-CeO2/TiO2 from manganese acetate precursor may be attributed to higher surface and higher surface concentration of activity component.
Low-temperature SCR MnOX-CeO2/TiO2 Catalytic material NO conversion
Qidong Liu Suping Cui Hongxia Guo Yali Wan Yunfeng Zhang
The College of Materials Science and Engineering, Beijing University of Technology,Pingleyuan 100, Chaoyang District, Beijing, 100124, China
国际会议
the Chinese Materials Congress 2012(2012年中国材料大会(CMC2012))
太原
英文
198-203
2012-07-13（万方平台首次上网日期，不代表论文的发表时间）