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Selective cleavage of ether C-O bond in lignin-derived compounds over Ru system under different H-sources

机译：在不同H烃源下rusiN衍生化合物中木质素衍生化合物醚C-O键的选择性切割

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摘要

Selective hydrogenolysis, the aromatic ether C-O bonds under mild conditions, is crucial for the valorization of lignin. In this context, the effects of H-2 and solvent on the hydrogenolysis of lignin model compounds over Ru catalysts were explored. With H-2 as hydrogen donor, the Ru/AC exhibited the highest activity for converting lignin model compounds into monomeric compounds, whereas H-2 led to low selectivity of aromatics. However, isopropanol was the good H-donor solvent, which could provide a large amount of active hydrogen to promote the cleavage of C-O bonds. Additionally, the yield of aromatics in isopropanol was higher than that under H-2 atmosphere. It could be ascribed to the fact that isopropanol is the protic solvent which displays Lewis basicity, and is a good H-bond donor and a good H-bond acceptor. The higher electron-releasing inductive effect of isopropanol made it easier to provide active hydrogen. Based on the experiments, the mechanism of benzyl phenyl ether hydrogenolysis in H-2 and isopropanol system was presented.
机译：选择性氢解，在温和条件下的芳族醚C-O键对木质素的算子至关重要。在这种情况下，探讨了H-2和溶剂对木质素模型化合物对Ru催化剂的氢化的影响。用H-2作为氢供体，Ru / Ac表现出最高的活性，用于将木质素模型化合物转化为单体化合物，而H-2导致芳烃的选择性低。然而，异丙醇是良好的H-供体溶剂，其可以提供大量的活性氢以促进C-O键的切割。另外，异丙醇中芳烃的产量高于H-2气氛下的产率。它可以归因于异丙醇是显示Lewis碱度的质子溶剂，是良好的H键供体和良好的H键受体。异丙醇的较高的电子释放感应效果使其更容易提供活性氢。基于实验，提出了H-2和异丙醇体系中苄基苯基醚氢解的机理。

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  • 来源
    《Fuel》 |2021年第15期|119027.1-119027.9|共9页
  • 作者

    Cao Jing-Pei; Xie Tao; Zhao Xiao-Yan; Zhu Chen; Jiang Wei; Zhao Ming; Zhao Yun-Peng; Wei Xian-Yong;

  • 作者单位

    China Univ Min & Technol Minist Educ Key Lab Coal Proc & Efficient Utilizat Xuzhou 221116 Jiangsu Peoples R China;

    China Univ Min & Technol Minist Educ Key Lab Coal Proc & Efficient Utilizat Xuzhou 221116 Jiangsu Peoples R China;

    China Univ Min & Technol Minist Educ Key Lab Coal Proc & Efficient Utilizat Xuzhou 221116 Jiangsu Peoples R China;

    China Univ Min & Technol Minist Educ Key Lab Coal Proc & Efficient Utilizat Xuzhou 221116 Jiangsu Peoples R China;

    China Univ Min & Technol Minist Educ Key Lab Coal Proc & Efficient Utilizat Xuzhou 221116 Jiangsu Peoples R China;

    China Univ Min & Technol Minist Educ Key Lab Coal Proc & Efficient Utilizat Xuzhou 221116 Jiangsu Peoples R China;

    China Univ Min & Technol Minist Educ Key Lab Coal Proc & Efficient Utilizat Xuzhou 221116 Jiangsu Peoples R China;

    China Univ Min & Technol Minist Educ Key Lab Coal Proc & Efficient Utilizat Xuzhou 221116 Jiangsu Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Selective cleavage; Ether C-O bond; Lignin-derived compounds; Ru catalysts; Isopropanol;

    机译：选择性切割;醚C-O键;木质素衍生的化合物;Ru催化剂;异丙醇;

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