有机胺催化有机溶剂预处理玉米秸秆用于酶解糖化和高品质木质素。
Organic amine catalytic organosolv pretreatment of corn stover for enzymatic saccharification and high-quality lignin.
机构信息
College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 210009, China; National Engineering Technique Research Center for Biotechnology, Nanjing, China.
College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 210009, China; National Engineering Technique Research Center for Biotechnology, Nanjing, China; Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing, China.
出版信息
Bioresour Technol. 2017 May;232:222-228. doi: 10.1016/j.biortech.2017.02.041. Epub 2017 Feb 13.
A novel and efficient organic amine and organosolv synergetic pretreatment method was developed to overcome the recalcitrance of lignocellulose to produce fermentable sugars and high-quality salt-free lignin. After optimization of the process parameters, a delignification of 81.7% and total sugar yield of 83.2% (87.1% glucose, 75.4% xylose) could be obtained using n-propylamine (10mmol/g, biomass) as a catalyst and aqueous ethanol (60%, v/v) as a solvent. The susceptibility of the substrates to enzymatic digestibility was explained by their physical and chemical characteristics. The physical structure of extracted lignin showed higher β-aryl ether bonds content and functionalities, offering the potential for further downstream upgrading. The role of organic amine catalyst and a synergistic mechanism is proposed for the present system.
开发了一种新颖、高效的有机胺和有机溶剂协同预处理方法，以克服木质纤维素的顽固性，生产可发酵糖和高质量无盐木质素。在优化工艺参数后，使用正丙胺（10mmol/g，生物质）作为催化剂，水-乙醇（60%，v/v）作为溶剂，可获得 81.7%的脱木质素率和 83.2%的总糖得率（87.1%葡萄糖，75.4%木糖）。通过其物理化学特性解释了底物对酶解的敏感性。提取木质素的物理结构显示出更高的β-芳基醚键含量和官能团，为进一步的下游升级提供了潜力。提出了有机胺催化剂和协同机制在本体系中的作用。
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