柴油车尾气中的氮氧化物日益危及人类健康和生态环境。Cu-SSZ-13分子筛脱硝催化剂因宽的温度窗口、优异的水热稳定性等性能而受到广泛关注。为了适应更为严格的氮氧化物排放标准，进一步提高Cu-SSZ-13分子筛催化剂的NH₃-SCR反应性能，深入研究Cu-SSZ-13分子筛催化剂物理化学性能及其对NH₃-SCR脱硝反应机理影响十分必要。介绍了近年来Cu-SSZ-13分子筛催化剂及其NH₃-SCR脱硝机理的研究进展。详细论述了Cu-SSZ-13分子筛催化剂在NH₃-SCR反应过程中的活性铜物种及其变化，并对不同Cu-SSZ-13分子筛催化剂的制备方法进行了比较。提出Cu-SSZ-13分子筛催化剂NH₃-SCR脱硝技术研究中SO₂气氛和理论与实验的结合需要进一步研究。

Nitrogen oxides (NO_x) in the exhaust gas from diesel vehicles are increasingly threatening human health and ecological environment.Due to its wide temperature window,excellent hydrothermal stability and other performances,Cu-SSZ-13 molecular sieve catalyst for removal of NO_x is attracting more attentions.In order to meet the legislative emission requirements for NO_x-containing exhaust gases and improve the NH₃ selective catalytic reduction (NH₃-SCR) reactive performances of Cu-SSZ-13 molecular sieve catalyst,it is necessary to study deeply the physicochemical properties of Cu-SSZ-13 catalyst and their influences on the reaction mechanism of NH₃-SCR.This paper summarizes the recent research progress in Cu-SSZ-13 catalyst and its NH₃-SCR reaction mechanism.This paper also describes in detail the changes of Cu active species of Cu-SSZ-13 catalyst in the reaction and compares the different preparation methods of Cu-SSZ-13 catalyst.The problems and suggestions in the study of Cu-SSZ-13 catalyst for removal of NO_x with NH₃-SCR technology are put forward.

赵小鸽(1993-),女,硕士生