文献类型：期刊文献

英文题名：Thulium oxides supported on MnCeTiOX catalysts for low-temperature NH3-SCR of NOX

作者：Lv, Shuyi[1];Huang, Jian[1];Chen, Yue[1];Zhang, Qiyao[1];Huang, Yongmin[1]

机构：[1]East China Univ Sci & Technol, Sch Chem & Mol Engn, Shanghai, Peoples R China

年份：2022

卷号：9

期号：6

外文期刊名：MATERIALS RESEARCH EXPRESS

收录：;EI(收录号：20222412218881);WOS:【SCI-EXPANDED(收录号:WOS:000805641100001)】；

基金：The authors acknowledge the Research Centre of Analysis and Test of East China University of Science and Technology.

语种：英文

外文关键词：low-temperature SCR; Tm doped; MnCeTiOX; sol-gel

摘要：In this work, the MnCeTiOX catalyst was prepared by sol-gel method and doped with thulium (Tm), which improved its low-temperature selective catalytic reduction (SCR) activity and resistance to SO2 poisoning. In this paper, the surface properties of Tm-doped MnCeTiOX catalysts were studied and analysed by means of BET, XRD, SEM, NH3-TPD, H-2-TPR and XPS. The catalyst performance was tested by using simulated flue gas. The results show that Tm doping can effectively inhibit the crystallization degree of TiO2, increase the catalyst specific surface area, and make the elements distribute more uniformly on the catalyst surface. Meanwhile, the amount of Bronsted acid sites could be increased by Tm doping. It also increased the concentration of surface adsorbed oxygen and the ratio of Mn4+/Mn and Ce3+/Ce. Therefore, the activity of the catalyst was improved by Tm doping in the temperature range of 90 degrees C to 270 degrees C, the catalyst activity remained above 97% in the temperature range of 180 degrees C to 270 degrees C. And the catalyst activity remained above 88% after a 10 h-SO2 poisoning test. Tm doping could effectively inhibit SO2 poisoning of the catalyst and reduce the adsorption of SO2 on the catalyst surface.