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首页> 外文期刊>RSC Advances >Catalytic oxidation of ethyl acetate and toluene over Cu-Ce-Zr supported ZSM-5/TiO2 catalysts
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Catalytic oxidation of ethyl acetate and toluene over Cu-Ce-Zr supported ZSM-5/TiO2 catalysts

机译：Cu-Ce-Zr支持ZSM-5 / TiO2催化剂催化氧化乙酸乙酯和甲苯

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摘要

Copper-cerium-zirconium catalysts loaded on ZSM-5/TiO2 (denoted as CCZ/Z and CCZ/T) were prepared and characterized in this investigation and the catalytic behaviors of VOCs over the catalysts were determined. It is shown that the low-temperature activities of ethyl acetate and toluene oxidation over the CCZ/T catalyst are obviously higher than that over the CCZ/Z catalyst. Compared with CCZ/Z, the force between the metal oxides and the support TiO2 is weaker and TiO2 can provide some lattice oxygen. The greater number of oxygen vacancies, together with more Cu+ species in CCZ/T increases the mobility of atomic oxygen anions, which can inhibit by-product formation and enhance catalytic activity effectively. Moreover, the larger pore size of CCZ/T is beneficial for the diffusion of reactants and products. The analysis of intermediate species and the Mars-van Krevelen mechanism well explain the superior oxidation performances of ethyl acetate and toluene on CCZ/T. Both CCZ/Z and CCZ/T show superior stability for the catalytic removal of ethyl acetate and toluene at their complete conversion temperatures, which contribute to the positive effects of the Ce-Zr promoters on the copper species and support.
机译：制备ZSM-5 / TiO 2上的铜 - 铈 - 锆催化剂（表示为CCZ / Z和CCZ / T），并在该研究中表征，测定对催化剂上的VOC的催化行为。结果表明，CCZ / T催化剂上乙酸乙酯和甲苯氧化的低温活性明显高于CCZ / Z催化剂。与CCZ / Z相比，金属氧化物和支撑TiO 2之间的力较弱，TiO2可以提供一些晶格氧。在CCZ / T中具有更多Cu +物种的氧空位数量增加了原子氧阴离子的迁移率，这可以抑制副产物的形成和有效增强催化活性。此外，CCZ / T的较大孔径对反应物和产物的扩散有益。中间物种和MARS-VAN Krevelen机制的分析良好地解释了CCZ / T上乙酸乙酯和甲苯的优异氧化性能。既CCZ / Z和CCZ / T示出了用于在催化除去乙酸乙酯和甲苯在它们的完全转化温度，这有助于在铜物种和支持铈锆启动子的积极效果优异的稳定性。

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  • 来源
    《RSC Advances》 |2016年第59期|共8页
  • 作者

    Dou Baojuan; Li Shumin; Liu Deliang; Zhao Ruozhu; Liu Jingge; Hao Qinglan; Bin Feng;

  • 作者单位

    Tianjin Univ Sci &

    Technol Coll Marine &

    Environm Sci Tianjin 300457 Peoples R China;

    Tianjin Univ Sci &

    Technol Coll Chem Engn &

    Mat Sci Tianjin 300457 Peoples R China;

    Tianjin Univ Sci &

    Technol Coll Chem Engn &

    Mat Sci Tianjin 300457 Peoples R China;

    Tianjin Univ Sci &

    Technol Coll Chem Engn &

    Mat Sci Tianjin 300457 Peoples R China;

    Tianjin Univ Sci &

    Technol Coll Chem Engn &

    Mat Sci Tianjin 300457 Peoples R China;

    Tianjin Univ Sci &

    Technol Coll Chem Engn &

    Mat Sci Tianjin 300457 Peoples R China;

    Chinese Acad Sci Inst Mech State Key Lab High Temp Gas Dynam Beijing 100190 Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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