Chinese Journal of Catalysis ›› 2025, Vol. 68: 356-365.DOI: 10.1016/S1872-2067(24)60186-5

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Selective utilization of formaldehyde stabilizing additive and methoxy groups in lignin for the production of high-carbon-number arenes

Lin Donga,b,c, Zhiqiang Fangb, Qianbo Yuana, Yong Fana, Yong Yangd, Ping Wangd, Shixiong Shengd,*(), Yanqin Wange,*(), Zupeng Chena,d,*()   

  1. aJiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, International Innovation Center for Forest Chemicals and Materials, College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, Jiangsu, China
    bState Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, Guangdong, China
    cFeili Chemical Engineering (Zhejiang Suichang) Co. Ltd., Suichang 323316, Zhejiang, China
    dDehua TB New Decoration Material Co., Ltd, Huzhou 313200, Zhejiang, China
    eKey Laboratory for Advanced Materials and Joint International Research Laboratory of Precision Chemistry and Molecular Engineering, Feringa Nobel Prize Scientist Joint Research Center, Research Institute of Industrial Catalysis, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, China
  • Received:2024-08-30 Accepted:2024-10-22 Online:2025-01-18 Published:2025-01-02
  • Contact: * E-mail: 38701@qq.com (S. Sheng), wangyanqin@ecust.edu.cn (Y. Wang), czp@njfu.edu.cn (Z. Chen).
  • Supported by:
    National Key Research and Development Program of China(2023YFD2200505);National Natural Science Foundation of China(22202105);National Natural Science Foundation of China(22002043);Natural Science Foundation of Jiangsu Higher Education Institutions of China(21KJA150003);Innovation and Entrepreneurship Team Program of Jiangsu Province(JSSCTD202345);China Postdoctoral Science Foundation(2023M731703);China Postdoctoral Science Foundation(2024T170415);State Key Laboratory of Pulp and Paper Engineering(202414)

Abstract:

Many strategies have been proposed to produce arenes from lignin as liquid fuel additives. However, the development of these methods is limited by the low yield of products, low atom utilization, and inefficient lignin depolymerization. Herein, we develop an energy-efficient synthetic method for the production of high-carbon-number arenes from sustainable lignin with a total yield of 23.1 wt%. Particularly, high carbon number arenes are obtained by fully utilizing the formaldehyde stabilizing additive and the methoxy group in lignin. The process begins with the reductive depolymerization of formaldehyde-stabilized lignin, followed by transmethylation between lignin monomers over Au/Nb2O5 catalyst, and the Ru/Nb2O5-catalyzed hydrodeoxygenation. This work demonstrates the potential of value-added arenes production directly from lignin.

Key words: Lignin, Arene, Transmethylation, Hydrodeoxygenation, Liquid fuel additive