title: NH3-SCR denitration catalyst performance over vanadium-titanium with the addition of Ce and Sb.
abstract: Selective catalytic reduction technology using NH3 as a reducing agent (NH3-SCR) is an effective control method to remove nitrogen oxides. TiO2-supported vanadium oxide catalysts with different levels of Ce and Sb modification were prepared by an impregnation method and were characterized by X-ray diffractometer (XRD), Brunauer-Emmett-Teller (BET), Transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FT-IR), UV-Vis diffuse reflectance spectroscopy (UV-Vis DRS), Raman and Hydrogen temperature-programmed reduction (H2-TPR). The catalytic activities of V5CexSby/TiO2 catalysts for denitration were investigated in a fixed bed flow microreactor. The results showed that cerium, vanadium and antimony oxide as the active components were well dispersed on TiO2, and the catalysts exhibited a large number of d-d electronic transitions, which were helpful to strengthen SCR reactivity. The V5CexSby/TiO2 catalysts exhibited a good low temperature NH3-SCR catalytic activity. In the temperature range of 210 to 400°C, the V5CexSby/TiO2 catalysts gave NO conversion rates above 90%. For the best V5Ce35Sb2/TiO2 catalyst, at a reaction temperature of 210°C, the NO conversion rate had already reached 90%. The catalysts had different catalytic activity with different Ce loadings. With the increase of Ce loading, the NO conversion rate also increased.
authors.affiliation: State Key Laboratory of Heavy Oil, China University of Petroleum, Beijing 102249, China. Electronic address: fxxuchi@126.com.
authors.forename: Chi
authors.initials: C
authors.lastname: Xu
authors.affiliation: State Key Laboratory of Heavy Oil, China University of Petroleum, Beijing 102249, China. Electronic address: liujian@cup.edu.cn.
authors.forename: Jian
authors.initials: J
authors.lastname: Liu
authors.affiliation: State Key Laboratory of Heavy Oil, China University of Petroleum, Beijing 102249, China.
authors.forename: Zhen
authors.initials: Z
authors.lastname: Zhao
authors.affiliation: Department of Agricultural and Biological Engineering, Mississippi State University, 130 Creelman St, Mississippi State, MS 39762, United States.
authors.forename: Fei
authors.initials: F
authors.lastname: Yu
authors.affiliation: State Key Laboratory of Heavy Oil, China University of Petroleum, Beijing 102249, China.
authors.forename: Kai
authors.initials: K
authors.lastname: Cheng
authors.affiliation: State Key Laboratory of Heavy Oil, China University of Petroleum, Beijing 102249, China.
authors.forename: Yuechang
authors.initials: Y
authors.lastname: Wei
authors.affiliation: State Key Laboratory of Heavy Oil, China University of Petroleum, Beijing 102249, China.
authors.forename: Aijun
authors.initials: A
authors.lastname: Duan
authors.affiliation: State Key Laboratory of Heavy Oil, China University of Petroleum, Beijing 102249, China.
authors.forename: Guiyuan
authors.initials: G
authors.lastname: Jiang
mesh_terms: D000641:Ammonia / Q000737:chemistry*; D000965:Antimony / Q000737:chemistry*; D002384:Catalysis; D002563:Cerium / Q000737:chemistry*; D046529:Microscopy, Electron, Transmission; D010084:Oxidation-Reduction; D013057:Spectrum Analysis / Q000379:methods; D014025:Titanium / Q000737:chemistry*; D017968:Vanadium Compounds / Q000737:chemistry*; D014961:X-Ray Diffraction
chemical_list: D017968:Vanadium Compounds; C009495:titanium dioxide; D002563:Cerium; D000641:Ammonia; D000965:Antimony; D014025:Titanium
keywords: Denitration; Low temperature; N(2) selectivity; SCR; VCeSb/TiO(2) catalyst