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Citation: ZHANG Hai-jie, WANG Jian, XU Xiu-feng. Catalytic decomposition of N2O over NixCo1-xCoAlO4 spinel oxides prepared by sol-gel method[J]. Journal of Fuel Chemistry and Technology, ;2015, 43(1): 81-87. shu

Catalytic decomposition of N2O over NixCo1-xCoAlO4 spinel oxides prepared by sol-gel method

  • 1.

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

  • Corresponding author: XU Xiu-feng, 
  • Received Date: 18 September 2014
    Available Online: 5 November 2014

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

  • NixCo1-xCoAlO4 spinel oxides with different compositions were prepared by sol-gel method and further modified with K2CO3 by incipient impregnation. The NixCo1-xCoAlO4 spinel oxides were characterized by means of nitrogen physisorption, X-ray diffraction (XRD), scanning electron microscopy (SEM), and temperature-programmed reduction by hydrogen (H2-TPR); the effect of preparation parameters such as composition, mother liquid pH value, and potassium loading on their catalytic activity in N2O decomposition was investigated. The results show that the K/Ni0.15Co0.85CoAlO4 catalyst prepared with a pH value of 3 and a K/(Ni+Co) molar ratio of 0.1 is most active for N2O decomposition; over it, N2O can be completely decomposed into nitrogen and oxygen at 450 ℃ in the presence of oxygen. K-modified catalysts exhibit high catalytic activity, good reducibility and resistance towards water, as K species may be able to weaken the surface metal-oxygen bonds.
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