级联利用生物质：将纤维素，半纤维素和木质素转化成有用化学物质的策略,ACS Sustainable Chemistry & Engineering

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级联利用生物质：将纤维素，半纤维素和木质素转化成有用化学物质的策略
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2019-04-23 00:00:00 , DOI: 10.1021/acssuschemeng.9b00786
Aritomo Yamaguchi ₁ , Naoki Mimura ₁ , Masayuki Shirai _{1,

2} , Osamu Sato ₁

Affiliation

木质纤维素的所有三个成分（纤维素，半纤维素和木质素）的有效利用将促进通过光合作用固定的二氧化碳的有效利用。使用可重复使用的固体催化剂，在没有有机溶剂，酸或碱的水中，研究了木质纤维素生物质的所有这三种聚合物组分向相应的单体化学物质的转化。首先使用碳载铂催化剂（Pt / C），H _2将纤维素和半纤维素转化为糖醇，如山梨糖醇和木糖醇。和甘蔗渣在463 K下反应16 h。糖醇产率为64％。通过简单过滤回收了该过程中的固体残留物，主要是木质素和Pt / C。然后将固体残余物中的木质素在673 K下转化为芳香族产物1小时。单体芳族化合物的产率为40％。在该过程之后，仅回收了Pt / C催化剂作为固体残留物，并且在整个四次运行中，它都保留了其将木质纤维素生物质的所有三种组分转化为相应的单体化学品的活性。因此，显示出使用Pt / C进行甘蔗渣的两步转化是将木质纤维素生物质中的纤维素，半纤维素和木质素转化为有用化学品的有效技术。

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Cascade Utilization of Biomass: Strategy for Conversion of Cellulose, Hemicellulose, and Lignin into Useful Chemicals

Efficient utilization of all three components of lignocellulose—cellulose, hemicellulose, and lignin—impels efficient utilization of carbon dioxide fixed by photosynthesis. Conversion of all three of these polymeric components of lignocellulosic biomass into the corresponding monomeric chemicals was investigated using reusable solid catalysts in water without organic solvents, acids, or bases. Cellulose and hemicellulose were first converted into sugar alcohols such as sorbitol and xylitol using a carbon-supported platinum catalyst (Pt/C), H₂, and bagasse as a reactant at 463 K for 16 h. The sugar alcohol yield was 64%. The solid residue from this process, which was mainly lignin and Pt/C, was recovered by simple filtration. Lignin in the solid residue was then converted into aromatic products at 673 K for 1 h. The yield of monomeric aromatics was 40%. After this process, only Pt/C catalyst was recovered as a solid residue, and it retained its activity for the conversion of all three components of lignocellulosic biomass into the corresponding monomeric chemicals throughout four runs. The two-step conversion of bagasse using Pt/C was thereby shown to be a powerful technique for converting the cellulose, hemicellulose, and lignin in lignocellulosic biomass into useful chemicals.

更新日期：2019-04-23

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