Synergetic effect of Cu-Fe composite oxides supported on Al-PILC for SCR of NO with NH<sub>3</sub>

ZHU Bin; FEI Zhao-yang; CHEN Xian; TANG Ji-hai; CUI Mi-fen; QIAO Xu

Volume 42 Issue 09

Sep. 2014

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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(09): 1102-1110.

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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(09): 1102-1110.

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

1.
College of Chemistry and Chemical Engineering, Nanjing University of Technology, Nanjing 210009, China;
2.
State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing University of Technology, Nanjing 210009, China

Received Date: 2014-03-27
Rev Recd Date: 2014-06-06
Publish Date: 2014-09-30

Abstract

Abstract

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 A_BET and v_p 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.
- SCR,
- DeNO,
- Al-PILC,
- Cu-Fe composite oxides catalyst,
- synergetic effect

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References(32)

References

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