NOx分解还原催化研究进展

介绍和评价了ＮＯ_ｘ分解还原的３类催化剂：贵金属催化剂、氧化物催化剂、金属离子置换的分子筛。在ＮＯ_ｘ的碳氢化合物选择性催化还原反应（ＨＣ－ＳＣＲ反应）中，同样有３类催化剂，即金属氧化物、贵金属和分子筛。由于Ｃｕ－ＺＳＭ－５是目前最有希望投入实际使用的一种，故本文重点介绍了它对ＮＯ_ｘ的ＨＣ－ＳＣＲ反应的催化机理，以及温度、Ｏ_２含量、Ｃｕ~（２＋）的置换度、不同种类ＨＣ及ＨＣ含量等各种因素对Ｃｕ－ＺＳＭ－５的影响，并对其工作台试验进行了评价，指出了其存在的问题及当前的研究热点。

Development of Study on NOx Decomposition-Reduction Catalysts

The decomposition-reduction catalysts of NO_x are reviewed in this paper, which include 3 types: the noble metal catalyst, the oxide catalyst and the molecular seive replaced by metal ions. There are also catalysts of 3 types: the molecular seive; the metal oxide and the noble metal in the hydrocarbon selectivity catalyst reduction (HC-SCR) reaction of NO_x Cu-ZSM-5 is probably used, so it is introduced in detail in this paper including the catalyst mechanism, and the effects of temperature, O_2 concentration, replacement degree of Cu~(2 ), different kinds and contents of hydrocarbon on Cu-ZSM-5. Besides, the experiments related to the catalyst reduction reaction are discussed, and the problems and hot point of research are pointed out.