Acta Phys. -Chim. Sin. ›› 2001, Vol. 17 ›› Issue (08): 696-701.doi: 10.3866/PKU.WHXB20010806
• ARTICLE •
Xue Jun;Zhu Jian-Hua;Shen Bin;Ma Li-Li
Decomposition of Nnitrosodimethylamine (NDMA) and Nnitrosopyrrolidine (NPYR) on zeolite Y and ZSM5 was investigated by means of temperature programmed surface reaction(TPSR) combined with GCMSD and IR techniques. Degradation of Nnitrosamine strongly depended on the activity of zeolite and was accelerated by acid sites. Products of Nnitrosamines degradation were changed by zeolite catalysis, cyano derivative appeared as the main product on NaZSM5 and NaY zeolites similar to that in pyrolysis while dimethylamine became the dominant one on HZSM5 and HY. Different reactions are thus proposed: on the latter the Bronsted acid sites probably play the role of main catalytic sites, hence Nnitrosamines degrades to amines while on the former Nnitrosamines may decompose through radical reaction process, similar to the process of pyrolysis. Protonation of zeolite NaY or NaZSM5 is proved not to be necessary for decomposition of Nnitrosamines. Zeolites are proved to be the novel materials for removing Nnitrosamines pollutants from environment.
Zeolite catalytic materials,
Decomposition of N-nitrosamines,
Gas chromatograph-mass spectroscopy,
Temperature programmed surface reaction
Xue Jun;Zhu Jian-Hua;Shen Bin;Ma Li-Li. Investigation on Catalytic Decomposition of N-nitrosamines over Zeolites[J].Acta Phys. -Chim. Sin., 2001, 17(08): 696-701.
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