项目名称: Pd-(Ce,Zr)Ox-Al2O3催化剂在不同服役环境下的失活机制及优化设计
项目编号: No.51202116
项目类型: 青年科学基金项目
立项/批准年度: 2013
项目学科: 无机非金属材料学科
项目作者: 冉锐
作者单位: 清华大学
项目金额: 25万元
中文摘要: 汽车尾气排放已成为城市大气污染的主要来源。随着排放法规的日益严格,对催化剂的性能和寿命都提出了更高的要求。系统分析催化剂在不同服役环境下的失活过程及机理,可以为指导更高性能催化剂的设计提供参考依据。本项目旨在充分了解汽车尾气净化用催化剂的真实服役环境的基础上,以典型三效催化剂Pd-(Ce,Zr)Ox-Al2O3为研究对象(其中(Ce,Zr)Ox表示CeO2-ZrO2复合氧化物),系统研究其在不同服役环境下的失活机制及催化剂中各组分间在不同条件下的相互作用规律,从而进一步找到提高催化剂性能、延长催化剂寿命的途径或方法。
中文关键词: 三效催化剂;催化机理;相互作用;稳定性;
英文摘要: The vehicle exhaust pollution has been considered as a major source of the urban air pollution. The more and more strict emission regulations demand the developing of high-performance catalysts with both better activity and longer durability. The systematic analysis on the deactivation mechanisms of three-way catalysts at their service environment can provide reference for high-performance catalysts design. The present project will focus on the deactivation mechanisms of the typical Pd-(Ce,Zr)Ox-Al2O3 three-way catalysts at different service environment, as well as the interactions between the components in the catalysts under the selected conditions. On the basis of the above research, the techniques to improve the activity and lifetime of the catalysts will be developed.
英文关键词: Three-way catalysts;catalytic mechanism;interaction;stability;