钛锡负载型催化剂的创制及其对NO消除性能和机理研究

NOx emission has been regulated in the national 12th Five-Year Plan for the first time, and reduction of NOx will be very urgent in the years ahead. The catalytic reduction of NO has been attracted widely attention in the field of environmental catalysis. How to improve the low-temperature activity and high-tempertaure stability is an urgent problem to be resolved for the promotion of the NO catalytic reduction. According to the former works, supported TiO2-SnO2 catalysts showed great advantages of high thermal stability, reversible poisoning, good catalytic activity at the low temperature for the abatement of atmospheric pollutant. In this project, supported TiO2-SnO2 catalysts are synthesised, characterized and tested on NO removal reaction. Special attention is paid to the preparation of catalysts, elucidating the relationship between the structure of surface active species, surface oxygen vacancy, and the activity of catalysts in NO removal reaction. Combined with the in situ FT-IR characterization、quasi in situ XPS technology and theoretical calculations, discussing the catalytic reaction mechanism. The project is supposed to provide theoretical and experimental evidence for design and development of economical and practical catalysts for NO removal.

“十二五”计划首次将氮氧化物列入约束性指标，氮氧化物已成为我国今后一段时间内的减排重点。催化消除NO一直是环境催化领域的研究热点，对于如何提高催化剂的低温活性和高温热稳定性是推广催化消除NO技术的重要因素。初步研究表明，钛锡复合氧化物负载型催化剂在大气污染物消除方面主要表现为热稳定性高、抗中毒和较高的催化活性等优点。本项目拟以钛锡复合氧化物负载型催化剂的表征及其对NO消除性能为研究对象，系统考察此类催化剂的制备规律、表面活性组分的结构、表面氧空位的调控及其在NO消除(以移动污染源的NO消除为应用背景)反应中的催化活性的关系，结合原位红外、准原位XPS表征和理论计算，探讨催化反应机理，为设计开发经济实用的NO消除催化剂提供相关的基础参考和实验依据。

氮氧化物已成为我国今后一段时间内的减排重点。催化消除NO一直是环境催化领域的研究热点，对于如何提高催化剂的低温活性和高温热稳定性是推广催化消除NO技术的重要因素。本课题针对我国丰富的钛和稀土资源及其在催化方面的独特性能，希望通过研究钛基和稀土催化剂在环境领域中的催化作用，推进环境保护技术的进步，为国民经济发展做出贡献。初步研究表明，钛基和铈基催化剂在大气分子污染物消除方面主要表现为热稳定性高、抗中毒和低温活性好等。同时，含铈基的负载型催化剂，不仅有较大的比表面积和高温稳定性，而且有较宽的组成调变范围。本项目以铈基和钛基负载型催化剂的表征及其对NO、CO的消除及光催化性能为研究对象，系统考察此催化剂的制备规律、表面活性组分的结构及其在“NO+CO”、“CO+O2”反应中和有机物降解催化活性的关系，为设计开发经济实用的多功能催化剂提供基础参考，并针对我国特色工业研发出经济、适用、高效的催化剂产品。项目资助发表SCI论文19篇，待发表论文4篇。培养博士生2名，已取得博士学位。硕士生3名，已取得硕士学位。项目投入经费是21万，支出18.9463万元，各项支出基本与预算相符。剩余经费2.0537万元，剩余经费计划用于本项目研究后续支出。