China Petroleum Processing & Petrochemical Technology ›› 2021, Vol. 23 ›› Issue (4): 7-17.

• Scientific Research • Previous Articles     Next Articles

MnxCo3-xO4 microtubules with enhanced catalytic activity towards toluene combustion:effects of redox property and oxygen species

Zhang Hanyu1,Hu yue1,Zhang Xiaohan1,Sun Mengyao1,Liu Rui1,Jin Quan2,Qi Jian1   

  1. 1. Key Laboratory of Automobile Materials (Ministry of Education), School of Materials Science and Engineering, Jilin University, Changchun 130022;
    2. School of Chemical Engineering, Dalian University of Technology, Panjin 124221;
    3. College of Environmental and Safety Engineering, Shenyang University of Chemical Technology, Shenyang 110142;
    4. State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190

  • Received:2021-05-22 Revised:2021-11-19 Online:2021-12-30 Published:2021-12-30
  • Contact: Jin Quan E-mail:qjin@jlu.edu.cn

Abstract: Redox property and oxygen species play important role in the catalytic oxidation of volatile organic compounds (VOCs). In this paper, a series of MnxCo3-xO4 catalysts with tubular structure were synthesized and applied for the catalytic combustion of toluene. Various characterization technologies were employed to reveal the relationship between the catalytic performance of the MnxCo3-xO4 catalysts and Mn doping. The results of XRD, SEM and N2 adsorption-desorption showed that the Mn doping had significant effects on the structure and morphology of the MnxCo3-xO4 catalysts. The H2-TPR, O2-TPD and XPS results proved that the strong interaction between Co and Mn resulted in the enhanced Olatt mobility, richer active oxygen species, and enhanced redox property in comparison with the pure Co3O4 sample, which were crucial to the improvement of the catalytic activity of Co-Mn catalysts. The best catalyst, Co5-Mn5 sample, exhibited a good and stable activity to catalytically oxidize toluene at low temperatures even in the presence of water vapor, indicating that it is a potential material for the practically catalytic industrialization for the abatement of toluene.

Key words: Catalytic combustion, Cobalt oxides, Manganese doping, Toluene