MoS2基催化剂加氢脱硫反应活性相和作用机理研究进展

doi:10.16085/j.issn.1000-6613.2018-0324

摘要/Abstract

摘要：

加氢脱硫工艺在清洁油品生产过程中发挥着重要作用，而MoS₂基催化剂是加氢脱硫的主要催化剂，因此对MoS₂基催化剂活性相和催化反应机理的深入研究有助于从原子层面上对催化剂进行优化设计。本文首先介绍了国内外有关MoS₂基催化剂活性相形貌结构的研究，着重探讨了硫化气氛、助剂和载体类型对活性相结构的影响，以及现有表征技术在MoS₂基催化剂活性相形貌结构研究中所面临的挑战，总结了不同条件下活性相的微观结构特征；同时，从MoS₂基催化剂的活性相组成和结构角度分析了噻吩的加氢脱硫机理，发现了加氢脱硫活性与催化剂微观结构之间的紧密联系；最后展望了理论计算在设计和开发高效加氢脱硫催化剂过程中的重要指导作用。

关键词: 加氢脱硫, 催化剂, 显微结构, 催化（作用）, 噻吩

Abstract:

Hydrodesulfurization(HDS) is an important process in producing clean fuel. MoS₂-based catalysts are the major catalysts in HDS, therefore a thorough understanding of the active phase structure and HDS mechanism is useful for the development of new catalysts. This paper reviewed the active phase structure of MoS₂-based catalysts， including the effects of sulfiding conditions, promoter atoms and support type. And a general overview of the challenges of characterization on the active phase structure of MoS₂-based catalysts was provided. The microstructure characteristics of the active phase under different conditions were summarized. Meanwhile, the catalytic mechanism of thiophene HDS was analyzed based on the composition and structure of MoS₂-based catalysts, and the results indicated that the HDS activity was closely related to the catalyst’s microstructure. Finally, the important role of theoretical calculation in the development and design of efficient hydrodesulfurization catalysts was outlined.

Key words: hydrodesulfurization, catalyst, microstructure, catalysis, thiophene

中图分类号:

TQ426

李硕, 刘熠斌, 冯翔, 杨朝合. MoS₂基催化剂加氢脱硫反应活性相和作用机理研究进展[J]. 化工进展, 2019, 38(02): 867-875.

Shuo LI, Yibin LIU, Xiang FENG, Chaohe YANG. Research progress in active phase structure and reaction mechanism of MoS₂-based catalysts for hydrodesulfurization[J]. Chemical Industry and Engineering Progress, 2019, 38(02): 867-875.

图/表 10

图1 层状堆积结构MoS2团簇球状模型

图2 不同预硫化条件下MoS2团簇的STM图像[21]

图3 MoS2边缘形态随 Δ μ S和 Δ μ H变化相图[21]

图4 MeMoS活性相原子级STM图像[27]

图5 CoMoS活性相结构图[28]

图6 A型NiMoS活性相结构图[28]

图7 B型NiMoS活性相结构图[28]

图8 载体相互作用强度对活性相团簇形态的影响（STM图像和球状模型）[33]

图9 噻吩加氢脱硫反应路径图

图10 噻吩在Mo边、S边和CoMoS上加氢脱硫反应路径（虚线代表反应速率较慢）[57]

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MoS₂基催化剂加氢脱硫反应活性相和作用机理研究进展

Research progress in active phase structure and reaction mechanism of MoS₂-based catalysts for hydrodesulfurization

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