Schuit Institute of Catalysis, Inorganic Materials Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB, Eindhoven, The Netherlands.
Combustion Technology, Department of Mechanical Engineering, Eindhoven University of Technology, P.O. Box 513, 5600 MB, Eindhoven, The Netherlands.
ChemSusChem. 2016 Dec 8;9(23):3262-3267. doi: 10.1002/cssc.201601252. Epub 2016 Oct 21.
Adding value to lignin, the most complex and recalcitrant fraction in lignocellulosic biomass, is highly relevant to costefficient operation of biorefineries. We report the use of homogeneous metal triflates to rapidly release lignin from biomass. Combined with metal-catalyzed hydrogenolysis, the process separates woody biomass into few lignin-derived alkylmethoxyphenols and cellulose under mild conditions. Model compound studies show the unique catalytic properties of metal triflates in cleaving lignin-carbohydrate interlinkages. The lignin fragments can then be disassembled by hydrogenolysis. The tandem process is flexible and allows obtaining good aromatic monomer yields from different woods (36-48 wt %, lignin base). The cellulose-rich residue is an ideal feedstock for established biorefining processes. The highly productive strategy is characterized by short reaction times, low metal triflate catalyst requirement, and leaving cellulose largely untouched.
将木质素（木质纤维素生物质中最复杂和最难处理的部分）增值对于生物精炼厂的高效运行具有重要意义。我们报告了使用均相金属三氟甲磺酸酯快速从生物质中释放木质素。结合金属催化的氢解，该过程在温和条件下将木质生物质分离成少数木质素衍生的烷氧基苯酚和纤维素。模型化合物研究表明，金属三氟甲磺酸酯在切断木质素-碳水化合物键联方面具有独特的催化性能。然后可以通过氢解将木质素片段分解。该串联过程具有灵活性，可以从不同木材（木质素基 36-48wt%）中获得良好的芳香单体产率。富含纤维素的残渣是现有生物精炼工艺的理想原料。这种高效的策略具有反应时间短、金属三氟甲磺酸酯催化剂需求低以及纤维素基本不受影响的特点。
