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首页> 外文期刊>New Journal of Chemistry >Effect of the ZnO/SiO(2)ratio on the structure and catalytic activity of Cu/SiO(2)and Cu/ZnO catalysts in water-containing ester hydrogenation
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Effect of the ZnO/SiO(2)ratio on the structure and catalytic activity of Cu/SiO(2)and Cu/ZnO catalysts in water-containing ester hydrogenation

机译：ZnO / SiO（2）比对Cu / SiO（2）和Cu / ZnO催化剂在含水酯氢化中的结构和催化活性的影响

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摘要

The effects of the ZnO/SiO(2)ratio on the water tolerance of Cu/SiO(2)and Cu/ZnO catalysts were studied by ethyl acetate with 5 wt% water hydrogenation. Notably, the addition of an appropriate amount of ZnO endows Cu/SiO(2)catalysts with satisfactory water-tolerant hydrogenation performance by a decrease in the reaction temperature without sacrificing conversion. At the same time, agglomeration can be alleviated for Cu/ZnO catalysts due to the optimal addition of SiO2, which is considered as a partition material that effectively hinders the agglomeration of the Cu/ZnO catalyst. However, the addition of ZnO was not favourable for the copper dispersion of Cu/SiO2. The stability of Cu/SiO(2)catalyst quickly degraded due to excessive ZnO being introduced by sintering. The copper dispersion of Cu/ZnO catalysts initially increased with increasing SiO(2)content, but then decreased. The addition of excess SiO(2)also led to decreased activity and rapid deactivation of the Cu/ZnO catalyst. In our study, the appropriate addition of ZnO (5 wt%) and SiO2(5 wt%) had a positive effect on the Cu/SiO(2)and Cu/ZnO catalysts, respectively.
机译：用5wt％水氢化的乙酸乙酯研究了ZnO / SiO（2）比对Cu / SiO（2）和Cu / ZnO催化剂的耐水性的影响。值得注意的是，通过在反应温度的降低而不牺牲转化率，加入适量的ZnO赋予Cu / SiO（2）催化剂以令人满意的耐水性氢化性能。同时，由于SiO 2的最佳加入，可以缓解聚集的Cu / ZnO催化剂，这被认为是有效地阻碍Cu / ZnO催化剂附聚的分隔膜。然而，添加ZnO不利于Cu / SiO2的铜分散体。由于烧结引入过量的ZnO，Cu / SiO（2）催化剂的稳定性迅速降解。 Cu / ZnO催化剂的铜分散体最初随着SiO（2）含量的增加而增加，但随后降低。加入过量的SiO（2）也导致Cu / ZnO催化剂的活性和快速失活。在我们的研究中，ZnO（5wt％）和SiO 2（5wt％）的适当加入分别对Cu / SiO（2）和Cu / ZnO催化剂的正效作用。

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  • 来源
    《New Journal of Chemistry》 |2020年第34期|共8页
  • 作者

    Chen Zheng; Wei Shuwei; Zhao Xueying; Wang Dengfeng; Chen Jiangang;

  • 作者单位

    Zaozhuang Univ Coll Chem Chem Engn &

    Mat Sci Zaozhuang 277160 Shandong Peoples R China;

    Zaozhuang Univ Coll Chem Chem Engn &

    Mat Sci Zaozhuang 277160 Shandong Peoples R China;

    Zaozhuang Univ Coll Chem Chem Engn &

    Mat Sci Zaozhuang 277160 Shandong Peoples R China;

    Zaozhuang Univ Coll Chem Chem Engn &

    Mat Sci Zaozhuang 277160 Shandong Peoples R China;

    Chinese Acad Sci Inst Coal Chem State Key Lab Coal Convers Taiyuan 030001 Shanxi Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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