固体碱预处理耦合木质素降解制备酚类化学品的机理研究

项目名称： 固体碱预处理耦合木质素降解制备酚类化学品的机理研究

项目编号： No.51476179

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 能源与动力工程

项目作者： 庄新姝

作者单位： 中国科学院广州能源研究所

项目金额： 83万元

中文摘要： 预处理是提高木质纤维素燃料乙醇生产效率及整个过程能耗和经济性的关键技术。温和条件下利用现有制浆造纸设备，固体碱预处理与木质素高值转化相结合是能耗和经济性兼顾的具有工业化应用前景的预处理技术之一。本项目针对固体碱预处理木质纤维素耦合木质素降解制备酚类化学品中关键问题- - 固体碱作用下木质纤维素结构变化和木质素可控氧化降解，提出以碱性可调的碱/碱土金属掺杂稀土复合氧化物为催化剂，借鉴或沿用现有制浆造纸设备，耦合木质素降解制备酚类化学品的木质纤维素燃料乙醇预处理工艺。通过系统研究稀土掺杂复合碱/碱土金属氧化物固体碱的制备方法、化学组成、表面性质和结构等因素对木质纤维素结构和组分变化影响，结合预处理过程中传热、传质规律研究，建立预处理反应流程和模型，关联并优化预处理效果、能耗及后续酶解发酵效率关系，为形成工业化固体碱预处理技术，整体降低木质纤维素燃料乙醇工艺成本投入，提高能量输出效率提供理论指导。

中文关键词： 固体碱；预处理；木质素降解；酚类化学品；燃料乙醇

英文摘要： Lignocellulose pretreatment, which is a key technology to improve the efficiency of fuel ethanol production, is an integral part of the national renewable energy policy plan. Taking advantages of existing pulp and paper equipment, solid alkalis pretreatment combined with lignin utilization under mild condition is economical, efficient and promising technology for industrial application. This project focuses on the two crucial problems in pretreating lignocellulose with solid alkalis and the degradation of lignin into phenolic compounds during the pretreatment process，the sensitive factors of lignocellulose structure in solid alkalis and selective depolymerization of lignin. To solving these problems, the basic adjustable solid alkalis, alkaline earth metal complex oxides adopted by rare earth elements, for pretreatment and conversion of lignin into phenolic chemicals technology using existing pulp and paper industry equipment are proposed. The influence of the producing method, chemical composition, surface and structural properties of the solid alkalis on the pretreated lignocellulose, together with heat and mass transfer during pretreatment process will be studied to establish a macroscopic response model for the solid alkalis pretreatment of lignocellulose, which will combine and optimize the pretreatment with the following enzyme hydrolysis, and will provide theoretical guidance for both the industrial solid alkalis pretreatment technology and an economical and efficient fuel ethanol technology.

英文关键词： solid alkali;pretreatment;lignin degradation;phenolic compounds;fuel ethanol