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Citation: ZHU Bin, FEI Zhao-yang, CHEN Xian, TANG Ji-hai, CUI Mi-fen, QIAO Xu. Synergetic effect of Cu-Fe composite oxides supported on Al-PILC for SCR of NO with NH3[J]. Journal of Fuel Chemistry and Technology, ;2014, 42(9): 1102-1110. shu

Synergetic effect of Cu-Fe composite oxides supported on Al-PILC for SCR of NO with NH3

  • 1.

    1. College of Chemistry and Chemical Engineering, Nanjing University of Technology, Nanjing 210009, China;

  • Corresponding author: QIAO Xu, 
  • Received Date: 27 March 2014
    Available Online: 6 June 2014

    Fund Project: 国家自然科学基金(21306089) (21306089)国家科技支撑计划(2011BAE18B01) (2011BAE18B01)江苏省高校自然科学基金(13KJB530006) (13KJB530006)江苏省科技支撑计划(BE2011830)。 (BE2011830)

  • Cu/Al-PILC, Fe/Al-PILC and CuFe/Al-PILC were prepared by rotary evaporation-impregnation method using Al-PILC as support. Selected catalytic reduction of NO with NH3 (NH3-SCR) was carried out in a fixed bed reactor to evaluate their catalytic performance. Compared to Cu/Al-PILC and Fe/Al-PILC, CuFe/Al-PILC showed better NO removal efficiency (97%) and a wider temperature range (290~450℃) of 90% DeNO because of the strong synergetic effect of Cu-Fe composite oxides. Moreover, CuFe/Al-PILC showed good resistance to water vapor and SO2. XRD, UV-vis, XPS and N2 adsorption were used to characterize the structure of the catalysts. A new phase CuFe2O4 formed in CuFe/Al-PILC, which changed the surface properties of CuFe/Al-PILC, improved the dispersion of Cu and Fe on the Al-PILC surface and increased ABET and vp of CuFe/Al-PILC. H2-TPR confirmed the existence of CuFe2O4, which improved the re-dox property of CuFe/Al-PILC. The result of NH3-TPD implied that the surface acidity of CuFe/Al-PILC made it possible to adsorb and desorb NH3 in a wide temperature range. The concentration of reducible species on the surface of CuFe/Al-PILC increased, which resulted in high NO removal efficiency.
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