An acid-redox dual sites synergistic NH3-SCR catalyst,
a preparation method, and an application thereof
(22) 04.06.2021
(45) 22.07.2021
(57) The present invention relates to the field of air pollution control technical, in particular to an acid-redox dual sites synergistic NH3-SCR catalyst, a preparation method and an application thereof. Disclosed in the present invention is an acid-redox dual sites synergistic NH3-SCR catalyst, which the general formula is AxOy/RzOw, and type A elements are different from type R elements. AxOy is selected from WO3, MoO3, Nb2O5, Sb2O5, SiO2 or Mn2O7, and RzOw is selected from Fe2O3, Co3O4, NiO, MnO2, CeO2 or CuO. In this invention, the hydrothermal with impregnation method was used to synthesis the acid-redox dual sites synergistic NH3-SCR catalyst, which effectively compensated for the defects of traditional V2O5-WO3/TiO2, such as poor adsorption capacity and excessive oxidation of NH3, narrow temperature window, and weak resistance of sulfur and water under low-temperature. The catalyst in this invention can tolerate nitrogen oxide flue gas containing 0~1000 mg/m3 SO2 and 0~20 vol.% water vapor simultaneously under 150~400 °C and the space velocity of 10000~100000 h-1, and the denitrification efficiency can be stable above 85%, which is suitable for the control of nitrogen oxide emissions from industrial source flue gas, such as glass and cement boilers, steel furnaces, and bio-fueled boilers, etc.
(71) Qilu University of Technology; Shandong Environmental Protection Industry Research Institute; Fujian Agriculture and Forestry University
