功能化多级孔沸石Beta纳米催化剂的设计合成及其碳烟颗粒催化氧化性能研究

项目名称： 功能化多级孔沸石Beta纳米催化剂的设计合成及其碳烟颗粒催化氧化性能研究

项目编号： No.51502330

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 一般工业技术

项目作者： 周晓霞

作者单位： 中国科学院上海硅酸盐研究所

项目金额： 21万元

中文摘要： 面对越来越严重的环境污染问题和严格的机动车尾气排放法规，设计高效的催化剂用于柴油车尾气中碳烟颗粒的净化已成为材料和环境科学研究领域的热点课题。针对传统碳烟颗粒氧化催化剂普遍存在贵金属含量高、低温催化活性低、高温热稳定性差、抗硫和抗老化性能差等问题，本项目提出以具有大比表面积、可调孔尺寸、丰富酸含量以及高水热稳定性的多级孔沸石Beta作为催化剂载体的设计思路。拟将多价态的金属氧化物通过合适的配比均匀负载于多级孔沸石Beta中，制备功能化多级孔非贵金属纳米催化剂。在实验室模拟柴油车尾气的条件下，对合成的材料进行催化性能测试，系统评价其催化活性、热稳定性、抗水抗硫性以及抗老化性能；同时开展对催化剂中活性组分之间以及活性组分与载体之间的协同催化机制以及催化剂抗硫中毒机理等探讨。本项目的开展将为碳烟氧化催化剂的设计与催化机制等理论研究提供科学支撑，同时对拓展多级孔沸石基纳米材料的应用也具有重要意义。

中文关键词： 多级孔沸石Beta；纳米颗粒；碳烟氧化；金属氧化物；协同催化

英文摘要： With the serious environmental pollution problem and stringent auto emissions standards, the design of highly efficient catalysts for soot oxidation has became a research hotspot in the materials and environmental science fields. In the soot oxidation, the traditional catalysts have some drawbacks, i.e., high noble metal content, low catalytic activity and thermal stability, bad sulfur resistance and anti-ageing performance. To solve these problems, a novel hierarchically porous zeolite Beta has been proposed, as catalyst carrier, which has larger surface area, controlled pore size, rich acidic sites and high thermal/hydrothermal stability. A series of varied-valences metal oxides were then highly dispersed into the as-synthesized hierarchically porous zeolite Beta. The catalytic activity to soot oxidation of the obtained samples has been tested on a simulation diesel emission condition, and the catalytic activity, thermal stability, water/sulfur resistance and anti-ageing performance have also been systematically evaluated. More importantly, the synergetic effect between active species and catalyst carrier, and the water/sulfur resistance mechanisms of the prepared samples have been investigated. This research will not only offer the scientific support for the design of catalyst on soot oxidation, but also expand the applied fields of hierarchically porous zeolite-based materials.

英文关键词： hierarchically porous zeolite Beta ;nannoparticles;soot oxidation;metal oxides;synergetic effect