铈掺杂钛基固溶体催化剂的制备与催化还原NOx的机理研究

项目名称： 铈掺杂钛基固溶体催化剂的制备与催化还原NOx的机理研究

项目编号： No.51306034

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 能源与动力工程

项目作者： 张亚平

作者单位： 东南大学

项目金额： 26万元

中文摘要： 针对我国丰富的稀土资源和稀土在催化方面的独特性能，希望通过研究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，为国民经济发展直接做出贡献。初步研究表明，铈在大气分子污染物消除方面主要表现为热稳定性高、抗中毒和储氧-释氧能力强、低温活性好等。同时，固溶体材料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和由于组分间的相互作用产生一些独特性质。本项目拟以钛基固溶体(Ti-Zr/Sn)为载体，采用XRD，原位FT-IR，TPR 和TPD 等技术，结NO 催化消除的活性评价等，系统考察催化剂表面NO 分子的单吸附及共吸附（与NH3，O2,SO2 等）性质，探索铈掺杂催化剂的制备规律、表面活性组分的存在状态和催化活性的关系，阐明铈掺杂对固溶体催化还原NO 的改性方法和促进机理，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。

中文关键词： CeO2；ZrO2；SnO2；反应机理；毒化

英文摘要： In view of the rich rare earth resources in China and the unique properties of rare earth in the aspect of catalytic reaction, we wish to push the development of environmental protection technology and contribute to the national economic growth through the in-depth research on catalytic properties of the rare earth catalysts in the field of environment science. The preliminary research showes that Ceria displays strong thermal stability, poisoning resistance, oxygen storage/release abilities and high low-temperature catalytic performance in the removal of atmospheric contaminants. Meanwhile, the solid solution materials exhibit larger specific surface area and high thermal stability as well as wider range of composition adjustment and some other unique features due to the interaction of components. In this research, Ti-based solid solutions (Ti-Sn and Ti-Zr) are used as the carriers of the catalysts.Series of in situ characterization techniques ,like XRD, FT-IR, TPR and TPD, will be employed in combination with the catalytic performance measurement for selective catalytic reduction of NO to investigate systematically the single absorption or co-absorption of NO molecular (with NH3， SO2, O2,et al.)on the surface of Ce-doped qudra-component catalysts and find out the preparation rules of Ce-doped catalysts and th

英文关键词： CeO2；ZrO2；SnO2；reaction mechanism；poisoning