【摘要】 采用气相色谱－质谱（ＧＣ－ＭＳＤ）、程序升温表面反应（ＴＰＳＲ）和红外光谱（ＩＲ）技术研究吡咯烷亚硝胺（ＮＰＹＲ）和二甲基亚硝胺（ＮＤＭＡ）等亚硝胺在ＮａＹ、ＨＹ、ＮａＺＳＭ－５、ＨＺＳＭ－５等沸石上的催化分解，并剖析其产物分布，发现亚硝胺在Ｎａ＋型沸石上的裂解产物近似于热裂解，而在Ｈ＋型沸石上则发生了质子参与的催化裂解反应．更多还原

【Abstract】 Decomposition of N-nitrosodimethylamine (NDMA) and N-nitrosopyrrolidine (NPYR) on zeolite Y and ZSM-5 was investigated by means of temperature programmed surface reaction(TPSR) combined with GC-MSD and IR techniques. Degradation of N-nitrosamine strongly depended on the activity of zeolite and was accelerated by acid sites. Products of N-nitrosamines degradation were changed by zeolite catalysis, cyano derivative appeared as the main product on NaZSM-5 and NaY zeolites similar to that in pyrolysis while dimethylamine became the dominant one on HZSM-5 and HY. Different reactions are thus proposed: on the latter the Bronsted acid sites probably play the role of main catalytic sites, hence N-nitrosamines degrades to amines while on the former N-nitrosamines may decompose through radical reaction process, similar to the process of pyrolysis. Protonation of zeolite NaY or NaZSM-5 is proved not to be necessary for decomposition of N-nitrosamines. Zeolites are proved to be the novel materials for removing N-nitrosamines pollutants from en-vironment.更多还原