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Cylindrical shaped ZnO combined Cu catalysts for the hydrogenation of CO2 to methanol

机译：圆柱形ZnO组合Cu催化剂，用于将CO 2氢化到甲醇中

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摘要

Hydrogenation of CO2 to chemicals is of great importance in the reduction of greenhouse gas emission. And the interaction and/or the boundary between Cu and ZnO played a crucial role in the performance of the Cu-ZnO catalyst for CO2 hydrogenation to methanol. In this work, cylindrical shaped ZnO was first synthesized via controlled hydrothermal precipitation of Zn(CO2CH3)(2)center dot 2H(2)O, and Cu was further deposited on ZnO via in situ reduction in aqueous solution. Characterizations indicated that the crystallization degree of ZnO decreased with the increasing content of Cu, while the exposed surface area of Cu exhibited a volcano shaped curve. It was found that the cylindrical shaped ZnO combined Cu catalysts were active for the hydrogenation of CO2, and the space time yield of methanol reached 0.50 g-MeOH (g(-cat) h)(-1) at H-2/CO2 = 3, 240 degrees C, 3.0 MPa, and 0.54 mol (g(-cat) h)(-1), but the methanol selectivity decreases with the reduction of the (002) polar plane of ZnO. The conversion of CO2 and methanol selectivity were discussed with the detected exposed Cu surface area and the number of oxygen vacancies.
机译：CO2对化学品的氢化在减少温室气体排放方面具有重要意义。并且Cu和ZnO之间的相互作用和/或边界在Cu-ZnO催化剂对甲醇的Cu-ZnO催化剂的性能方面发挥了至关重要的作用。在这项工作中，首先通过受控的Zn（CO 2 CH 3）（2）中心点2H（2）O的水热沉淀合成圆柱形ZnO，并且通过原位还原在水溶液中进一步沉积Cu在ZnO上沉积。表征表明，随着Cu的增加，ZnO的结晶度降低，而Cu的暴露表面积显示出火山形曲线。结果发现，圆柱形ZnO合并的Cu催化剂用于CO 2的氢化，甲醇的空间时间产率达到0.50g-meOH（g（-cat）h）（ - 1），在H-2 / CO 2 = 3,240℃，3.0MPa和0.54摩尔（G（-CAT）H）（ - 1），但甲醇选择性随着ZnO（002）极性平面的还原而降低。用检测到的暴露的Cu表面积和氧空位数讨论CO 2和甲醇选择性的转化。

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  • 来源
    《RSC Advances》 |2019年第24期|共9页
  • 作者

    Lei Hong; Zheng Ruheng; Liu Yeping; Gao Jiacheng; Chen Xiang; Feng Xiaoliang;

  • 作者单位

    Quzhou Univ Coll Chem &

    Mat Engn Quzhou 324000 Peoples R China;

    Quzhou Univ Coll Chem &

    Mat Engn Quzhou 324000 Peoples R China;

    Quzhou Univ Coll Chem &

    Mat Engn Quzhou 324000 Peoples R China;

    Quzhou Univ Coll Chem &

    Mat Engn Quzhou 324000 Peoples R China;

    Quzhou Univ Coll Chem &

    Mat Engn Quzhou 324000 Peoples R China;

    Quzhou Univ Coll Chem &

    Mat Engn Quzhou 324000 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
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