超声/电-Fenton解聚秸秆的研究

项目名称： 超声/电-Fenton解聚秸秆的研究

项目编号： No.21306144

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 化学工业

项目作者： 覃远航

作者单位： 武汉工程大学

项目金额： 25万元

中文摘要： 以木质纤维素如农作物秸秆为原料的第二代生物乙醇是很有潜力的石油替代品。木质纤维素中纤维素的水解是制备生物乙醇的关键。然而，纤维素特殊而复杂的结构使得其水解异常困难，这极大地限制了生物乙醇的大规模生产。为了提高水解效率，开发有效的预处理工艺破坏木质素的缠绕作用和纤维素的结晶结构，降低纤维素的聚合度，提高纤维素的可触及度是非常必要的。本项目拟开展超声/电-Fenton耦合解聚秸秆的研究。主要内容包括制备高效生成过氧化氢的电极；构建高效原位生成羟基自由基的电-Fenton体系；揭示超声/电-Fenton耦合体系解聚秸秆的协同效应机理；优化超声/电-Fenton耦合体系解聚秸秆的工艺参数，开发高效环保的超声/电-Fenton耦合工艺。本项目的顺利实施，将为木质纤维素的预处理提供新的思路。

中文关键词： 木质纤维素；预处理；超声；电-Fenton；电催化剂

英文摘要： The second-generation bioethanol derived from lignocellulosic materials such as agricultural straw is a promising replacement for petroleum fuel. The hydrolysis of cellulose in lignocellulose is the key process in bioethanol production. However, the special and complicated structure makes cellulose especially resistant to hydrolysis, which significantly limits the large-scale production of bioethanol. To improve the hydrolysis efficiency, it is highly desirable to develop effective pretreatment processes which aim to break the lignin seal, disrupt the crystalline structure of cellulose, decrease the degree of polymerization of cellulose, and improve the accessibility of cellulose. In this program, the depolymerization of straw by sonoelectro-Fenton coupling process will be investigated. Therefore, this research mainly intends to include the following tasks: prepare highly active electrode for the production of hydrogen peroxide; develop highly efficient electro-Fenton system for the in-situ production of hydroxyl radical; reveal the synergistic mechanism for straw depolymerization by sonoelectro-Fenton coupling process; optimize the process parameters for straw depolymerization and develop highly efficient and environmentally friendly sonoelectro-Fenton process for straw depolymerization. The success of this pro

英文关键词： lignocellulose；pretreatment；ultrasound；electro-Fenton；electrocatalyst