Enhancing the efficiency of gas-liquid-solid reactions using a monolithic microhoneycomb catalyst
Enhancing the efficiency of gas-liquid-solid reactions using a monolithic microhoneycomb catalyst
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使用整体式微蜂窝催化剂提高气-液-固反应的效率
DOI：
10.1016/j.cattod.2021.11.024
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发表时间：
2021
期刊：
影响因子：
5.3
通讯作者：
Mukai Shin R.
中科院分区：
文献类型：
--
作者：
Mega Hiroyuki;Takahashi Shunpei;Aihara Takuya;Yoshida Seiichiro;Iwamura Shinichiroh;Ogino Isao;Mukai Shin R.
在气液固三相反应中，整体式催化剂作为颗粒催化床的替代物已引起人们的广泛关注。本工作合成了具有微蜂窝结构的碳凝胶整体(Carbon Gel MicroHoncoms，CMHS)，并通过初湿法在其上负载了平均粒径为3.0 nm的铂颗粒。此外，还证实了负载的铂具有较高的抗烧结性。对对硝基苯酚进行了加氢反应，以评价其在三相反应中的催化活性。结果表明，即使在常温常压下，Pt/CMHS仍表现出较高的催化活性。此外，即使以完成反应所需的最低流速提供氢气，加氢反应仍可显著进行。由于铂/CMHS催化剂表现出比相同颗粒形式的催化剂更高的反应活性，因此采用蜂窝结构的整体式催化剂可以显著提高三相反应的效率。
Monolithic catalysts have attracted attention as a substitute for particulate catalyst beds in gas-liquid-solid three-phase reactions. In this work, carbon gel monoliths with a microhoneycomb structure (carbon gel microhoneycombs, CMHs) were synthesized, and Pt particles with an average particle diameter of 3.0 nm were loaded on them in a highly dispersed state through the incipient wetness method. In addition, it was confirmed that the loaded Pt shows a high resistance to sintering. Hydrogenation ofp-nitrophenol was carried out in order to evaluate the catalytic activity of Pt/CMHs in three-phase reactions. As a result, Pt/CMHs showed a high catalytic activity even at ambient temperature and normal pressure. Furthermore, the hydrogenation reaction significantly proceeded even when hydrogen was provided at the minimum flow rate required to complete the reaction. Since Pt/CMHs showed higher reaction activity than the same catalyst in the form of particles, it was concluded that the efficiency of three-phase reactions can be significantly improved by using monolithic catalysts with a microhoneycomb structure.