Chinese Journal of Catalysis ›› 2014, Vol. 35 ›› Issue (7): 1212-1223.DOI: 10.1016/S1872-2067(14)60091-7

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Study of catalytic activity and product selectivity of M/Al2O3-CeO2 (M=Pt-Ru, Ru, and Pt) in catalytic wet air oxidation of methylamine

Aiying Songa,b,c, Gongxuan Lüa   

  1. a. State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, Gansu, China;
    b. Chemical Physics Laboratory, Gansu Provincial Center for Disease Control and Prevention, Lanzhou 730020, Gansu, China;
    c. University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2014-01-28 Revised:2014-03-21 Online:2014-06-28 Published:2014-06-28
  • Supported by:

    This work was supported by the National Basic Research Program of China (973 Program, 2013CB632404, 2009CB220003), the National Natural Science Foundation of China (21373245, 21173242, 2012AA051501), and the Project Support of Gansu Provincial Science & Technology Department (1304FKCA085).

Abstract:

M/Al2O3-CeO2 (M=Pt-Ru, Ru, and Pt) catalysts were prepared using an impregnation method. Their catalytic performance in catalytic wet air oxidation (CWAO) of methylamine was compared. The catalysts were characterized using temperature-programmed reduction, X-ray photoelectron spectroscopy, X-ray diffraction, transmission electron microscopy, N2 adsorption, and CO chemisorption. The experimental results indicated that the dispersion of active species in the Pt-Ru/Al2O3-CeO2 catalyst was greatly improved by the introduction of Pt; therefore, its catalytic performance was significantly enhanced. Temperature-dependent activity showed hysteresis over the catalysts, indicating that CWAO of methylamine followed a chemisorption mechanism.

Key words: Dispersion, Hysteresis, Platinum, Ruthenium, Catalytic wet air oxidation, Methylamine