介孔分子筛催化剂形貌及尺度效应研究

项目名称： 介孔分子筛催化剂形貌及尺度效应研究

项目编号： No.21476108

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 有机化学

项目作者： 孔岩

作者单位： 南京工业大学

项目金额： 100万元

中文摘要： 载体形貌和尺度是决定负载型催化剂性能的关键，但目前国内外相关报道尚缺乏系统研究，原因在于一般载体难以通过常规合成方法实现对其形貌和尺度的可控合成。作为具有良好应用前景的催化剂载体，介孔分子筛的柔性外表面使得控制其微观形貌、尺度及孔道结构进而改善催化性能成为可能。芳烃选择氧化是石油化工的重要反应，H2O2作为氧化剂直接氧化是绿色、高效无污染路线，而钛作为活性组分在这类反应中表现出优异的催化性能。本项目拟在课题组成功合成纯二氧化硅纳米球、线、棒介孔材料并实现其微观尺度精细调控基础上，合成出钛原子修饰且形貌、尺度和结构可控的介孔分子筛催化剂；研究所合成材料在芳烃如苯、苯酚、苯乙烯选择氧化反应中的催化性能，通过关联反应物在不同形貌、尺寸、结构介孔分子筛中的限域效应、吸附脱附、扩散过程，探求形貌和尺度效应与催化性能之间关系的一般规律，提出理论模型并实现科学定量描述，为介孔分子筛工业催化应用建立基础。

中文关键词： 介孔分子筛；催化剂；芳烃氧化；形貌效应；尺度效应

英文摘要： The morphology and scale of supported catalysts play very important roles in their catalytic activity. However, there are fewer reports about the systematic research in this field, possibly due to the difficult synthesis of common support with controllable morphology and scale through conventional methods. As promising catalyst supports, the flexible surface of mesoporous molecule sieves makes it possible for the fine control of their morphology, scale and pore structure thereby improving the catalytic activity. The selective oxidation of aromatics are important reactions in petrochemical industry. The direct oxidation with H2O2 is recognized as an efficient, green and pollution-free route in which catalysts containing titanium as active ingredient were proved with excellent catalytic performance. Based on our previous wok in which pure mesoporous silica with different morphology such as nanosphere, nanowire and nanorod and controllable size have been successfully synthesized, this project is planned to synthesize titanium modified mesoporous silica with specific morphology, scale and structure and use them in the selective catalytic oxidation of aromatics such as benzene, phenol and styrene. By associating the confinement effect, adsorption-desorption properties and diffusion process of reactants in the catalysts, we will propose the theoretical model and explore the quantitative regularity between the morphology as well as the scale effect and catalytic properties. This project will establish the foundation for future industrial catalytic applications of mesoporous molecule sieves.

英文关键词： mesoporous molecule sieves;catalyst;aromatics oxidation;morphology effect;scale effect