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Citation: WANG Jian, FENG Ming, ZHANG Hai-jie, XU Xiu-feng. Catalytic decomposition of N2O over Mg-Fe mixed oxides[J]. Journal of Fuel Chemistry and Technology, ;2014, 42(12): 1464-1469. shu

Catalytic decomposition of N2O over Mg-Fe mixed oxides

  • 1.

    Institute of Applied Catalysis, Yantai University, Yantai 264005, China

  • Corresponding author: XU Xiu-feng, 
  • Received Date: 15 August 2014
    Available Online: 30 October 2014

    Fund Project: Supported by the Research Project from Department of Science and Technology of Shandong Province (2012GSF11708) (2012GSF11708)

  • A series of MgxFe1-xFe2O4 spinel oxides were prepared and characterized by means of nitrogen physisorption, X-ray diffraction (XRD) and temperature-programmed reduction of hydrogen (H2-TPR). The effect of composition, calcination temperature, and potassium doping on the catalytic activity of the Mg-Fe mixed oxides in N2O decomposition was investigated. The results indicated that the Mg0.6Fe0.4Fe2O4 catalyst calcined at 500 ℃ exhibits highest activity in N2O decomposition. Unexpectedly, the catalyst activity is depressed by the addition of potassium, as the potassium doping may inhibit the reduction of surface iron oxides and reduce the surface area of K-modified catalysts. Long-term tests at 500 ℃ for 10 h also illustrate that Mg0.6Fe0.4Fe2O4 is superior to FeOx catalyst either in the oxygen-alone or in the oxygen-steam concomitant atmosphere.
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