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    Home > Chemicals Industry > Chemical Technology > Lanzhou Institute of Chemical Physics realizes efficient catalytic oxidation and elimination of aromatic hydrocarbon VOCs by Ni-based catalyst

    Lanzhou Institute of Chemical Physics realizes efficient catalytic oxidation and elimination of aromatic hydrocarbon VOCs by Ni-based catalyst

    • Last Update: 2023-02-11
    • Source: Internet
    • Author: User
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    Volatile organic compounds (VOCs) are an important factor causing atmospheric pollution and the increase of ozone (O 3 ) concentration, and are an important control object in China's air pollution prevention and control battle
    Catalytic combustion technology (that is, catalytic oxidation method) has the characteristics of low light-off temperature, wide application range, and no secondary pollution, and has been widely used in the purification and elimination of mobile and stationary VOCs

    Precious metal catalysts are usually used to purify and eliminate aromatic hydrocarbon VOCs in existing industrial exhaust gas, but the price of precious metals is high.
    Therefore, the use of non-precious metal catalysts is an important research and development direction to reduce the cost of VOCs catalytic combustion technology



    With low price and abundant reserves, Ni-based catalysts are promising non-precious metal catalysts, which have attracted attention in the field of VOCs catalytic combustion
    However, the existing Ni-based catalysts have problems such as insufficient low-temperature activity and poor high-temperature hydrothermal stability in the catalytic combustion reaction of aromatic hydrocarbon VOCs, which limit their application in related fields


    To this end, the Industrial Catalysis Research Group of the National Engineering Research Center for Fine Petrochemical Intermediates, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, based on ordered mesoporous SiO nanotubes with high specific surface area, realized a three-layer C@SiO nanotube.
    2 @NiCo-Phyllosilicate nanofiber-derived core-shell SiO 2 @Ni a Co b O x nanotube catalyst preparation
    The guided growth of ordered mesoporous SiO2
    nanotubes and the presence of SMSI in the layered silicate nanosheet structure and the formation of surface-OH effectively inhibit the competitive adsorption of water molecules at the active metal sites and significantly enhance aromatic hydrocarbons Low-temperature oxidation activity and high-temperature hydrothermal stability of VOCs over Ni-based catalysts

    2 2 2 a b x 2

    Related research results were published in Applied Catalysis B: Environmental
    The research work is supported by the National Natural Science Foundation of China and the Cooperation Fund of the Institute of Clean Energy, Chinese Academy of Sciences


    Figure 1.
    Construction of core-shell SiO
    2 @Ni a Co b O x nanotube catalysts

    2 a b x

    Figure 2.
    VOCs catalytic oxidation performance of core-
    shell SiO
    2 @Ni a Co b O x catalyst

    2 a b x
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