Mechanistic Studies of TiO2-based Mn/Ni Catalysts for the Low Temperature SCR of NOx with NH3

TiO2 基 Mn/Ni 催化剂用于 NH3 低温 SCR 脱硝的机理研究

• 批准号: 0237172
• 负责人: Panagiotis Smirniotis
• 金额: --
• 依托单位: University of Cincinnati Main Campus
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-02-15 至 2008-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0237172&HistoricalAwards=false
• 关键词: Mechanistic; Studies; TiO2; based; Mn

Medium temperature DeNOx processes have been widely utilized throughout the world since the selective catalytic reduction (SCR) of NO by ammonia is widely recognized as a key chemical transformation for environmental protection. Hoewever, water and sulfur dioxide poisoning are important challenges for SCR catalysts that will be used to process alternative fuels and chemical feedstocks. Prior work by the principal investigator has demonstrated that Mn/TiO2 is active at temperatures as low as 80 oC and is resistant to water. Addition of Ni to this catalyst appears promising in order to enhance sulfur dioxide tolerance. The research will provide a fundamental understanding of Mn-Ni/TiO2 systems based on key mechanistic and spectroscopic investigations. Transient kinetic methods will be utilized in order to provide new insights into the reactions pathways and to establish the basis for high selectivity. The principal investigator will also use advanced instrumentation capabilities such as in situ FTIR spectroscopy with labeled compounds to determine adsorbed species and reactive intermediates. Other surface analysis techniques are skillfully incorporated into the proposed work. The combination of approaches is characteristic of excellent, modern catalysis research.The broader impacts of this research include education of students in advanced catalysis and characterization techniques and involvement in relevant technological applications. Students will be involved in poster and paper presentations and in preparation of numerous publications. The principal investigator is committed to recruiting under-represented minorities for the research program, including working with a new ethnic engineering office at the University of Cincinnati.

氨对NO的选择性催化还原（SCR）被广泛认为是环境保护的关键化学转化，因此中温脱硝工艺在世界范围内得到了广泛的应用。然而，水和二氧化硫中毒是将用于处理替代燃料和化学原料的SCR催化剂面临的重要挑战。首席研究员之前的工作已经证明，Mn/TiO2在低至80℃的温度下具有活性，并且具有耐水性。在该催化剂中加入镍，以提高对二氧化硫的耐受性。该研究将提供基于关键机理和光谱研究的Mn-Ni/TiO2体系的基本理解。瞬态动力学方法将被用于对反应途径提供新的见解，并为高选择性建立基础。首席研究员还将使用先进的仪器功能，如标记化合物的原位FTIR光谱，以确定吸附物质和反应性中间体。其他表面分析技术被巧妙地纳入提议的工作。这些方法的结合是优秀的现代催化研究的特点。这项研究的广泛影响包括教育学生掌握先进的催化和表征技术，并参与相关的技术应用。学生将参与海报和论文展示，并准备许多出版物。首席研究员致力于为研究项目招募代表性不足的少数族裔，包括与辛辛那提大学（University of Cincinnati）新成立的少数族裔工程办公室合作。