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Lignin-first depolymerization of native corn stover with an unsupported MoS2 catalyst

机译：木质素 - 用不支持的MOS2催化剂的天然玉米秸秆的第一解聚

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摘要

The lignin-first biorefinery method appears to be an attractive approach to produce phenolic chemicals. Herein, corn stover was employed for the production of phenolic monomers using an unsupported non-noble MoS2 catalyst. The yield of phenolic monomers was enhanced from 6.65% to 18.47% with MoS2 at 250 degrees C and about 75% lignin was degraded with more than 90% glucan reserved in the solid residues. The Fourier-Transform Infrared (FT-IR) and heteronuclear single quantum coherence-nuclear magnetic resonance (H-1-C-13 HSQC-NMR) characterization suggested that the cleavage of the beta-O-4, gamma-ester and benzyl ether linkages were enhanced, promoting the delignification and the depolymerization of lignin. The catalyst performance was relatively effective with 14.30% phenolic monomer yield after the fifth run. The effects of the reaction temperature, the initial hydrogen pressure, the dosage of catalyst, and the reaction time were investigated. The model reactions were also proposed for the potential mechanism study. This work provides some basic information for the improvement of the graminaceous plant lignin-first process with a non-noble metal catalyst.
机译：木质素 - 第一生物炉艺方法似乎是生产酚类化学品的有吸引力的方法。在此，使用玉米秸秆用于使用不支持的非贵宾MOS2催化剂生产酚类单体。酚类单体的产率从6.65％〜18.47％的MOS2增强，在250℃下，在固体残余物中保留大于90％的葡聚糖，将约75％的木质素降解。傅里叶变换红外（FT-IR）和异核单量子相干核磁共振（H-1-C-13 HSQC-NMR）表征表明，β-O-4，γ-酯和苄醚的切割联系得到增强，促进木质素的脱氨酸和解聚。催化剂性能在第五次运行后的14.30％酚类单体产率相对有效。研究了反应温度，初始氢气压力，催化剂剂量和反应时间的影响。还提出了用于潜在机制研究的模型反应。这项工作提供了一些基本信息，用于改善综素植物木质素 - 首先用非贵金属催化剂的方法。

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  • 来源
    《RSC Advances》 |2018年第3期|共10页
  • 作者

    Li Song; Li Wenzhi; Zhang Qi; Shu Riyang; Wang Huizhen; Xin Haosheng; Ma Longlong;

  • 作者单位

    Chinese Acad Sci Guangzhou Inst Energy Convers Guangzhou 510640 Guangdong Peoples R China;

    Univ Sci &

    Technol China Dept Thermal Sci &

    Energy Engn Lab Basic Res Biomass Convers &

    Utilizat Hefei 230026 Anhui Peoples R China;

    Chinese Acad Sci Guangzhou Inst Energy Convers Guangzhou 510640 Guangdong Peoples R China;

    Chinese Acad Sci Guangzhou Inst Energy Convers Guangzhou 510640 Guangdong Peoples R China;

    Univ Sci &

    Technol China Dept Thermal Sci &

    Energy Engn Lab Basic Res Biomass Convers &

    Utilizat Hefei 230026 Anhui Peoples R China;

    Univ Sci &

    Technol China Dept Thermal Sci &

    Energy Engn Lab Basic Res Biomass Convers &

    Utilizat Hefei 230026 Anhui Peoples R China;

    Chinese Acad Sci Guangzhou Inst Energy Convers Guangzhou 510640 Guangdong Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
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