Selective catalytic reduction of nitric oxide with a novel Mn-Ti-Ce oxide core-shell catalyst having improved low-temperature activity and water tolerance

被引:3
|
作者
Li, Huirong [1 ]
Schill, Leonhard [1 ]
Fehrmann, Rasmus [1 ]
Riisager, Anders [1 ]
机构
[1] Tech Univ Denmark, Ctr Catalysis & Sustainable Chem, Dept Chem, DK-2800 Lyngby, Denmark
关键词
Multi-shell structure; Selective catalytic reduction; NOx removal; Redox property; Surface acidity; POISONING RESISTANCE; MECHANISTIC ASPECTS; SCR CATALYST; MIXED-OXIDE; NOX; NH3; NH3-SCR; DEACTIVATION; PERFORMANCE; REACTIVITY;
D O I
10.1016/j.joei.2023.101266
中图分类号
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号
0807 ; 0820 ;
摘要
A novel core-shell-shell Mn-Ti-Ce oxide catalyst (MnOx@TiO2@CeO2) was synthesized by a three-step method and applied for the selective catalytic reduction of NOx with ammonia (NH3-SCR). The catalyst exhibited an excellent low-temperature activity with NOx conversion >80% in a broad temperature range under both dry (120-260 degrees C) and wet (180-255 degrees C) conditions with a weight hourly space velocity (WHSV) of 240,000 mL/ (g center dot h). Nitrogen physisorption and X-ray photoelectron spectroscopy (XPS) results showed that the formation of the inner TiO2 shell significantly increased the specific surface area, surface Mn4+/Mn ratio and chemisorbed oxygen, which could provide more active sites and promote the oxidation of NO to NO2. Ammonia temperatureprogrammed desorption (NH3-TPD) results indicated that the formation of the outer CeO2 shell not only extensively increased the surface acid sites but also enhanced the acid strength, beneficial for the ammonia adsorption and resulting in a good water tolerance.
引用
收藏
页数:9
相关论文
共 50 条
  • [41] Low-temperature combustion of 2,4,6-trichlorophenol in catalytic wet oxidation with nanocasted Mn-Ce-oxide catalyst
    Abecassis-Wolfovich, M.
    Landau, M. V.
    Brenner, A.
    Herskowitz, M.
    JOURNAL OF CATALYSIS, 2007, 247 (02) : 201 - 213
  • [42] Understanding the high performance of an iron-antimony binary metal oxide catalyst in selective catalytic reduction of nitric oxide with ammonia and its tolerance of water/sulfur dioxide
    Jia, Xuanxuan
    Liu, Hao
    Zhang, Yu
    Chen, Wei
    Tong, Qing
    Piao, Guangxia
    Sun, Chuanzhi
    Dong, Lin
    JOURNAL OF COLLOID AND INTERFACE SCIENCE, 2021, 581 : 427 - 441
  • [43] Engineering the core-shell structure CoMnOx@OTS cubic catalyst with excellent water resistance for low-temperature catalytic combustion of VOCs
    Wang, Jie
    Dong, Fang
    Yang, Dan
    Han, Weiliang
    Han, Weigao
    Tang, Zhicheng
    Niu, Lei
    ENVIRONMENTAL SCIENCE-NANO, 2024, 11 (08) : 3533 - 3550
  • [44] Characterization and Ammonia Adsorption-Desorption of Palygorskite-Supported Manganese Oxide as a Low-Temperature Selective Catalytic Reduction Catalyst
    Li Jinhu
    Zhang Xianlong
    Chen Tianhu
    Liu Haibo
    Shi Peichao
    CHINESE JOURNAL OF CATALYSIS, 2010, 31 (04) : 454 - 460
  • [45] A novel catalytic activity of Ce-Zr-Mn-Ox mixed oxides for low temperature selective catalytic reduction of NO with NH3
    Zhang, Qiulin
    Song, Zhongxian
    Ning, Ping
    Gu, Junjie
    ENVIRONMENTAL ENGINEERING, PTS 1-4, 2014, 864-867 : 635 - 639
  • [46] Effect of Ce/Mn molar ratios on the low-temperature catalytic activity of CeO2-MnOxcatalyst for selective catalytic reduction of NO by NH3
    Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming, China
    不详
    J. Mol. Catal., 5 (422-430):
  • [47] Highly active copper-based Ce@TiO2 core-shell catalysts for the selective reduction of nitric oxide with carbon monoxide in the presence of oxygen
    Lopez, Naima
    Aguila, Gonzalo
    Araya, Paulo
    Guerrero, Sichem
    CATALYSIS COMMUNICATIONS, 2018, 104 : 17 - 21
  • [48] Gd-Mn-Ti composite oxides anchored on waste coal fly ash for the low-temperature catalytic reduction of nitrogen oxide
    Zhao, Shuqi
    Song, Kunli
    Zhu, Jianru
    Ma, Dandan
    Shi, Jian-Wen
    SEPARATION AND PURIFICATION TECHNOLOGY, 2022, 302
  • [49] A strategy for constructing highly efficient yolk-shell Ce@Mn@TiOx catalyst with dual active sites for low-temperature selective catalytic reduction of NO with NH3
    Huang, Xiaosheng
    Dong, Fang
    Zhang, Guodong
    Guo, Yan
    Tang, Zhicheng
    CHEMICAL ENGINEERING JOURNAL, 2021, 419