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首页> 外文期刊>RSC Advances >Experimental study on the durability of the polydopamine functionalized gas-liquid-solid microreactor for nitrobenzene hydrogenation
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Experimental study on the durability of the polydopamine functionalized gas-liquid-solid microreactor for nitrobenzene hydrogenation

机译：聚二胺官能化气体 - 液体微反应器耐久性对硝基苯氢化的实验研究

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摘要

As a promising technique for multiphase catalytic reactions, the widespread applications of gas-liquid-solid microreactors are still limited by poor durability. Hence, in this work, a method for the preparation of Pd nanocatalysts inside a gas-liquid-solid microreactor was proposed to realize long-term durability using electroless deposition on the polydopamine functionalized surface followed by hydrogen reduction. This method not only increases the utilization efficiency of the Pd ions but also improves the durability of the microreactor. The chemical composition and topography characterization of the fabricated catalyst layer were tested using XPS and FESEM, respectively. The results indicated that the incorporation of hydrogen reduction resulted in nearly all palladium ions being reduced and the palladium nanoparticles were dispersed uniformly on the polydopamine modified surface. The microreactor prepared by this method exhibited high durability and high nitrobenzene conversion as compared to the traditional electroless catalyst deposition. Besides, it was shown that the increased inlet nitrobenzene concentration and flow rates played a negative role in the durability. The longer microreactor exhibited a better durability.
机译：作为多相催化反应的有希望的技术，气体 - 固体微反应器的广泛应用仍然受到耐久性差的限制。因此，在该作品中，提出了一种制备气体 - 液体 - 固体微反应器内的Pd纳米催化剂的方法，以实现在聚二胺官能化表面上使用无电沉积的长期耐久性，然后进行氢气。该方法不仅提高了PD离子的利用效率，而且还提高了微反应器的耐久性。使用XPS和FeSem测试制造的催化剂层的化学成分和形貌表征。结果表明，氢还原的掺入几乎所有钯离子，均匀地将钯纳米颗粒均匀地分散在聚二胺改性表面上。与传统的无电催化剂沉积相比，该方法制备的微反应器表现出高耐久性和高硝基苯转化。此外，结果表明，硝基苯浓度增加和流速在耐久性中发挥了负面作用。微反应器较长的耐用性。

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  • 来源
    《RSC Advances》 |2018年第11期|共9页
  • 作者

    Zhu Xun; Feng Hao; Chen Rong; Liao Qiang; Ye Dingding; Zhang Biao; Liu Jian; Liu Ming; Chen Gang;

  • 作者单位

    Chongqing Univ Key Lab Low Grade Energy Utilizat Technol &

    Syst Minist Educ Chongqing 400030 Peoples R China;

    Chongqing Univ Key Lab Low Grade Energy Utilizat Technol &

    Syst Minist Educ Chongqing 400030 Peoples R China;

    Chongqing Univ Key Lab Low Grade Energy Utilizat Technol &

    Syst Minist Educ Chongqing 400030 Peoples R China;

    Chongqing Univ Key Lab Low Grade Energy Utilizat Technol &

    Syst Minist Educ Chongqing 400030 Peoples R China;

    Chongqing Univ Key Lab Low Grade Energy Utilizat Technol &

    Syst Minist Educ Chongqing 400030 Peoples R China;

    Chongqing Univ Key Lab Low Grade Energy Utilizat Technol &

    Syst Minist Educ Chongqing 400030 Peoples R China;

    Chongqing Univ Key Lab Low Grade Energy Utilizat Technol &

    Syst Minist Educ Chongqing 400030 Peoples R China;

    Chongqing Univ Key Lab Low Grade Energy Utilizat Technol &

    Syst Minist Educ Chongqing 400030 Peoples R China;

    Chongqing Univ Key Lab Low Grade Energy Utilizat Technol &

    Syst Minist Educ Chongqing 400030 Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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