Acta Phys. -Chim. Sin. ›› 2010, Vol. 26 ›› Issue (10): 2739-2744.doi: 10.3866/PKU.WHXB20100928

• CATALYSIS AND SURFACE STRUCTURE • Previous Articles     Next Articles

Decomposition of N2O on ACo2O4/HZSM-5 Catalysts

WANG Hong, WANG Jun-Li, LI Cui-Qing, SONG Yong-Ji, CHI Yao-Ling, WANG Tao   

  1. 1. Department of Chemical Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, P. R. China;
    2. Hunan Changling Petrochemical Scientific and Technical Developing Company Limited, Changling 414000, Hunan Province, P. R. China
  • Received:2010-04-13 Revised:2010-05-24 Published:2010-09-27
  • Contact: LI Cui-Qing, WANG Hong E-mail:licuiqing@bipt.edu.cn, wanghong@bipt.edu.cn
  • Supported by:

    The project was supported by the Science and Technology Development of Bejing Education Committee, China (KM200910017002) and Academic Human Resources Development in Institutions of Higher Learning Under the Jurisdiction of Beijing Municipality, China (PHR200907129).

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Abstract:

ACo2O4(A=Mg, Ni, Zn)andACo2O4/HZSM-5 (A=Mg, Fe, Ni, Cu, Zn, Zr, La) catalysts were synthesized by the citric acid -ligated combustion method and by low -temperature complex impregnation, respectively. The catalysts were characterized by X-ray diffraction (XRD), ammonia temperature -programmed desorption (NH3-TPD), scanning electron microscopy (SEM), and energy dispersive X-ray microanalysis (EDS). The performance of the catalysts was evaluated with micro fixed bed reactor. The results showed that the catalytic activity was affected by the A-site ion, and when theA -site ion was Ni, Fe, Zr, or La, the catalysts had better catalytic activity and the temperature of N2O decomposition was lower. Compared with ACo2O4, the ACo2O4/HZSM -5 catalyst had better catalytic activity. ACo2O4 was present as ultrafine particles on the HZSM-5 zeolite and the ACo2O4/HZSM -5 catalyst had good acidity. All these factors are useful in improving the performance of these catalysts.

Key words: N2O, Spinel, Decompose, HZSM-5