Iron-doped Mn-Ce/TiO_2 catalyst for low temperature selective catalytic reduction of NO with NH_3

查看全文 作　　者：Boxiong Shen ,Ting Liu,Ning Zhao,Xiaoyan Yang,Lidan Deng College of Environmental Science and Engineering,Nankai University,Tianjin 300071,China.

出　　处：《Journal of Environmental Sciences》索引2010年第22卷第9期,共8页

基　　金：supported by the National Natural Science Foundation of China (No. 90610018,50976050);the New Century Excellent Talents in University (No. NCET-07-0457);the National Key Technologies R&D Program of Tianjin (No. 09ZCKFSH01900) 摘　　要：The catalysts of iron-doped Mn-Ce/TiO 2(Fe-Mn-Ce/TiO 2) prepared by sol-gel method were investigated for low temperature selective catalytic reduction(SCR) of NO with NH 3.It was found that the NO conversion over Fe-Mn-Ce/TiO 2 was obviously improved after iron doping compared with that over Mn-Ce/TiO 2.Fe-Mn-Ce/TiO 2 with the molar ratio of Fe/Ti = 0.1 exhibited the highest activity.The results showed that 96.8% NO conversion was obtained over Fe(0.1)-Mn-Ce/TiO 2 at 180°C at a space velocity of 50,000 hr 1.Fe-Mn-Ce/TiO 2 exhibited much higher resistance to H 2 O and SO 2 than that of Mn-Ce/TiO 2.The properties of the catalysts were characterized using X-ray diffraction(XRD),N 2 adsorption,temperature programmed desorption(NH 3-TPD and NOx-TPD),and Xray photoelectron spectroscopy(XPS) techniques.BET,NH3-TPD and NOx-TPD results showed that the specific surface area and NH3 and NOx adsorption capacity of the catalysts increased with iron doping.It was known from XPS analysis that iron valence state on the surface of the catalysts were in Fe3+ state.The doping of iron enhanced the dispersion and oxidation state of Mn and Ce on the surface of the catalysts.The oxygen concentrations on the surface of the catalysts were found to increase after iron doping.Fe-Mn-Ce/TiO2 represented a promising catalyst for low temperature SCR of NO with NH3 in the presence of H2 O and SO2. 关键词：TIO2催化剂选择性催化还原 NOx 掺铁低温 X射线光电子能谱 XPS分析催化剂表面

相关文献

参考文献（24）
引证文献（65）
耦合文献（0）

参考文献(24)

引证文献(65)

互联网出版许可证新出网证(渝)字10号全国400电话 - 免长途话费

Iron-doped Mn-Ce/TiO_2 catalyst for low temperature selective catalytic reduction of NO with NH_3

参考文献(24)

引证文献(65)

用户提示