Abstract: Efficient catalyst is the key for the removal of NO_x in selective catalytic reduction (SCR), the denitrification performance of catalysts depends mainly on the physicochemical properties of the catalysts. The difference in texture characteristics of catalysts has important influence on the activity and toxicity resistance at low temperature. In this paper, the research progress of catalytic denitrification by modified catalyst texture in recent years is reviewed, and the optimization of catalyst micro-morphology to improve the denitrification performance by expanding the specific surface area of catalyst support and improving the surface dispersity of active materials, is introduced. At the same time, the common methods for modifying the catalyst texture and the research on special structure catalysts in recent years are summarized. It shows that the special structure and morphology of the catalysts could significantly improve the acidity and active site properties of the catalyst, and hence the denitrification and antipoisoning properties. Following that, the future research directions of textural modification of catalysts are forecasted as to find more suitable physical and chemical methods for texture modification of the catalysts, to further use simulation technology in catalyst research, and continue to develop special structure catalysts to be used in engineering practice.

Key words: selective catalytic reduction, catalyst, nanostructure, flue gas denitrification, textural modification, special structure

摘要： 采用选择催化还原技术（SCR）有效脱除NO_x的关键在于高效催化剂，而催化剂脱硝性能主要取决于催化剂的物理化学性质，催化剂织构特性的差异对于催化剂低温活性及抗中毒性能具有重要的影响。本文综述了近年来通过改性催化剂织构强化催化剂脱硝性能的研究进展，重点阐述了通过拓展催化剂载体比表面积及提高活性物质的表面分散性等织构改性来优化催化剂微观形态，由此提高催化剂低温脱硝性能；同时介绍了改性催化剂织构的常用方法；并总结了近年来国内外学者对特殊结构催化剂的研究，众多文献表明催化剂的特殊结构和形态可以显著改善催化剂的酸性和活性位性质，提高催化剂的脱硝性能和抗中毒性能。在此基础上展望了未来催化剂织构改性的研究方向；寻求更合适的物理化学方法应用到催化剂织构改性、进一步采用仿真模拟技术用于催化剂研究以及继续开发研究特殊结构催化剂并应用到工程实践中。

关键词: 选择催化还原, 催化剂, 纳米结构, 烟气脱硝, 织构改性, 特殊结构