催化学报 ›› 2025, Vol. 70: 8-43.DOI: 10.1016/S1872-2067(24)60245-7

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乙炔氢氯化非金属碳催化剂的研究进展: 从杂原子掺杂到本征缺陷

魏抒豪, 蓝国钧*(), 邱一洋, 林迪, 孔薇, 李瑛*()   

  1. 浙江工业大学化工学院, 工业催化研究所, 浙江杭州 310014
  • 收稿日期:2025-01-19 接受日期:2025-02-14 出版日期:2025-03-18 发布日期:2025-03-20
  • 通讯作者: * 电子信箱: liying@zjut.edu.cn (李瑛),languojun@zjut.edu.cn (蓝国钧).
  • 基金资助:
    国家重点研发计划(2024YFC3907904);国家自然科学基金企业创新发展联合基金(U23B20162)

Advances in metal-free carbon catalysts for acetylene hydrochlorination: From heteroatom doping to intrinsic defects over the past decade

Shuhao Wei, Guojun Lan*(), Yiyang Qiu, Di Lin, Wei Kong, Ying Li*()   

  1. Institute of Industrial Catalysis, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou310014, Zhejiang, China
  • Received:2025-01-19 Accepted:2025-02-14 Online:2025-03-18 Published:2025-03-20
  • Contact: * E-mail: liying@zjut.edu.cn (Y. Li),languojun@zjut.edu.cn (G. Lan).
  • About author:Guojun Lan (Institute of Industrial catalysis, College of Chemical Engineering, Zhejiang University of Technology) received his B. Sc., and PhD degree from Zhejiang University of Technology in 2010 and 2016, respectively. During the period from January 2013 to August 2015, he was jointly trained at State key laboratory of Catalysis (SKLC), in Dalian Institute of Chemical Physics (DICP), the Chinese Academy of Sciences. He carried out postdoctoral research in the College of Environment, at Zhejiang University of Technology from 2016 to 2018. Since 2019, he has been working at the Institute of Industrial Catalysis, College of Chemical Engineering, Zhejiang University of Technology. His research interests mainly focus on the development of porous carbon materials and industrial catalysts, mainly include the design, synthesis and catalytic application of carbon-based catalysts, catalytic synthesis of vinyl chloride, green ammonia synthesis and hydrogenation of biomass derived chemicals in aqueous phase. He has coauthored more than 50 peer-reviewed papers.
    Ying Li (Institute of Industrial Catalysis, College of Chemical Engineering, Zhejiang University of Technology). Prof. Li Ying received his B.S. degree from Shandong Normal University (P. R. China) in 1998, and Ph.D. degree from Dalian Institute of Chemical Physics, Chinese Academy of Sciences in 2005. She carried out postdoctoral research at Institute of Catalysis, Eindhoven University of Technology (Netherlands) from 2005 to 2007. Since the end of 2007, she has been working in Institute of Industrial Catalysis, College of Chemical Engineering, Zhejiang University of Technology. Her research interests mainly focus on: carbon catalysis, preparation and application of porous carbon, green ammonia synthesis, and carbon-based solid waste resource utilization. She has published more than 200 peer-reviewed papers and 80 patents.
  • Supported by:
    National Key Research and Development Program of China(2024YFC3907904);Joint Fund for Enterprise Innovation Development of the National Natural Science Foundation of China(U23B20162)

摘要:

聚氯乙烯(PVC)由氯乙烯(VCM)通过聚合反应制得, 是我国产能最大的高分子材料之一. 鉴于我国“富煤、贫油、少气”的能源结构现状, 乙炔氢氯化法已成为国内生产氯乙烯单体的主要工艺. 当前, 工业界普遍采用活性炭负载氯化汞催化剂作为氯乙烯生产的催化剂. 然而, 随着全球范围内限汞政策的不断推进, 开发新型的无汞催化剂已成为当务之急. 尽管已有关于金、铜、钌等金属催化剂的研究报道, 但这些催化剂存在金属组分易流失、成本高昂及易因中毒而失活等缺陷. 相比之下, 无金属碳催化剂以其绿色环保、成本低廉且不存在金属烧结与流失问题等优势, 在无汞催化剂领域展现出了巨大的发展潜力. 非金属碳催化剂的开发被视为应对可持续催化挑战的重要途径, 特别是在替代煤基聚氯乙烯工业中有毒且危害环境的汞基催化剂方面, 已引起广泛关注. 自2014年乙炔氢氯化非金属碳催化剂被首次报道以来, 经过了十年的发展, 其催化活性及稳定性都获得了大幅度的提高. 在某些情况下, 非金属碳催化剂甚至表现出优于金属催化剂的性能, 充分展现了其作为汞催化剂可持续替代方案的巨大潜力.

本文系统总结了乙炔氢氯化碳催化剂的最新研究进展, 从碳催化剂的活性位结构认识的发展历程、催化剂的制备方法、催化反应和失活机理, 以及从实验室小试技术迈向大规模工业化应用过程中所面临的诸多挑战等几个方面进行阐述. 首先, 简要介绍了近十年来乙炔氢氯化碳催化剂的研究进展, 特别指出了活性位的识别逐渐深入的过程, 并阐述了不同活性位点(如单掺杂、共掺杂、缺陷、缺陷与杂原子的协同效应及曲率结构)在乙炔氢氯化反应中的作用机制. 然后, 讨论了碳催化剂的合成策略, 包括后处理法和直接碳化法制备杂原子掺杂碳催化剂, 以及高温脱杂原子和刻蚀等技术制备缺陷碳催化剂. 此外, 讨论了乙炔氢氯化碳催化反应机理和失活机理, 以及催化剂稳定和再生策略. 最后, 总结了非金属碳催化剂从实验室研究到工业化过程中可能面临的关键挑战及未来研究方向. 与工业催化剂相比, 非金属碳催化剂的稳定性仍存在较大差距, 亟需加强对催化剂失活机理及积炭物种的分析研究, 探索有效的抑制失活策略. 尽管碳催化剂在实验室规模生产中具有一定优势, 但在工业规模上可能面临成本效益和重复性问题, 因此需开发适用于工业放大生产的非金属碳催化剂. 由于非金属碳催化剂的复杂结构使得其活性位点仍存在争议, 未来应着力开发活性位点明确的非金属碳催化剂. 经济可行性是碳基非金属催化剂能否与金属催化剂竞争的关键, 需优选可持续碳源, 如生物质衍生物和废弃聚合物, 用于制备碳基非金属催化剂. 同时, 考虑到工业原料通常含有杂质, 实验室使用纯试剂的测试结果可能无法反映实际性能, 因此必须验证催化剂在工况条件下的表现.

综上, 本文系统地总结了碳基催化剂在乙炔氢氯化反应中的技术优势、活性位鉴别、合成策略、反应机理以及工业化应用过程中所面临的诸多挑战. 本文不仅为乙炔氢氯化反应中碳基催化剂的实际应用提供了有益的参考, 更为其他多相催化反应中绿色碳催化剂体系的设计与开发提供一定的参考和借鉴.

关键词: 无金属, 碳催化剂, 乙炔氢氯化, 杂原子掺杂, 缺陷工程

Abstract:

The development of metal-free carbon catalysts has garnered significant attention as a promising approach to address the challenges of sustainable catalysis, particularly in the replacement of toxic and environmentally hazardous mercury-based systems for the coal-based PVC industry. Within a decade of development, the catalytic performance of carbon catalysts has been improved greatly and even shows superiorities over metal catalysts in some cases, which have demonstrated great potential as sustainable alternatives to mercury catalysts. This review provides a comprehensive summary of the recent advancements in carbon catalysts for acetylene hydrochlorination. It encompasses a wide range of aspects, including the identification of active sites from heteroatom doping to intrinsic carbon defects, the various synthetic strategies employed, the reaction and deactivation mechanisms of carbon catalysts, and the current insights into the key challenges that are encountered on the journey from laboratory research to scalable commercialization within the field of carbon catalysts. The review offers foundational insights and practical guidelines for designing green carbon catalysts systems, not only for acetylene hydrochlorination but also for other heterogeneous catalytic reactions.

Key words: Metal-free, Carbon catalyst, Acetylene hydrochlorination, Heteroatom doping, Defect engineering