低温NH3-SCR反应机理及动力学研究进展

对低温选择性催化还原（SCR）脱硝技术的反应机理及动力学已有较多研究。本文从反应路径和反应机制两方面评述了低温SCR的反应机理，重点从氧在低温SCR中的作用、NO在催化剂上的吸附、NH3的活化、反应模型等方面进行了深入阐述。并结合反应机理探讨了低温SCR的反应动力学，最后对低温SCR脱硝技术的深入研究提出了建议。

Recent Advances in Mechanisms and Kinetics of Low-Temperature Selective Catalytic Reduction of NOX with NH3

The mechanisms and kinetics of low-temperature selective catalytic reduction (SCR) have attracted many researchers’ attention. The mechanisms of low-temperature SCR is reviewed by the reaction pathways and reaction models, focusing on the role of oxygen in the low-temperature SCR, the adsorption of NO over the catalyst, the nature of the active NH₃ species and the governing reaction models (Langmuir-Hinshelwood or Eley-Rideal). Moreover, combining with the mechanisms of low-temperature SCR, the kinetics of low-temperature SCR are critically discussed. Points of convergence and disagreement are underlined. The perspectives in low-temperature SCR are promoted. Contents
1 Introduction
2 Mechanisms of low-temperature selective catalytic reduction of NO_X with NH₃
2.1 Reaction pathways of low-temperature NH₃- SCR
2.2 Reaction mechanisms of low-temperature NH₃- SCR
3 Kinetics of low-temperature NH3- SCR
4 Conclusion and perspectives