芳基醚氧键选择加氢断裂Ni基催化剂的研究

项目名称： 芳基醚氧键选择加氢断裂Ni基催化剂的研究

项目编号： No.21473188

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 数理科学和化学

项目作者： 路芳

作者单位： 中国科学院大连化学物理研究所

项目金额： 80万元

中文摘要： 木质素芳基醚氧键催化加氢裂解，是木质素转化中的关键科学问题。本项目通过构建电子缺失可调的Ni基催化剂，通过对醚氧键中电子密度较高的氧原子识别和吸附，实现对木质素及其模型化合物中芳基醚氧键的选择裂解，制备含芳环结构的目标产物。通过对助剂成分、载体酸性的调变，使催化剂具有电子缺失的金属活性中心，采用超高分辨分析电镜显微学技术和光电子能谱等表征和检测手段，探索催化剂结构和芳基加氢与醚键加氢裂解之间的规律，通过原位红外、核磁等检测手段对反应机理进行研究。本项目不仅在电子缺失可控的Ni催化剂的制备方面具有创新性，而且在局部活化木质素所含芳基醚氧键，实现木质素的选择加氢断裂也具有创新性。本项目通过探索木质素催化反应中芳基醚氧键活化的本质，为木质素高值化利用的共性规律提供理论和科学依据，且对以生物质为原料的可再生能源的开发利用至关重要，对缓解石油紧缺带来的能源结构问题有重要社会意义和学术研究价值。

中文关键词： 催化加氢；生物质转化；纳米材料；构效关系；反应机理

英文摘要： Selective hydrogenolysis of aryl ethers in lignin is the key for the valorization of lignin. In this project, we want to develop a new electron-deficient nickel based supported catalyst. This catalyst could absorb the electron rich oxygen, and selective hydrogenolysis aryl ethers for the conversion of lignin to aromatics. Adjusting the promoter and the acidity of the support could change the electron density of the active metal center.The solvent provide the in-situ hydrogen. High resolution TEM and photoelectron spectroscopy technique will help to characterize and detect the morphology of the active metal and the electron state of the metal center. That information could help to explore the corelation between the structure of the catalyst and the rule of the hydrogenolysis of aryl ethers in lignin. In-situ IR and NMR can detect the reaction mediate, and explore the regulation of the activation of aryl ether bond. This project will provide the theoretical and scientific foundations for the high value valorization of lignin, it is also very important for biomass conversion, and it has important social significance and academic value for alleviating the shortage of the structure for energy sources.

英文关键词： catalysis hydrogenation;biomass conversion;nanomaterials;structure and catalytic performence;reaction mechanism