【摘要】 使用程序升温表面反应技术 ,首次研究了沸石对于分子直径远大于其孔径的烟草特有亚硝胺代表物N′ 亚硝基去甲烟碱的 (NNN)催化裂解作用 .NNN依然能被沸石吸附和催化裂解 ;沸石孔径和表面酸位都是影响催化分解NNN的重要因素 .计算表明 :NNN很可能以N—NO官能团嵌入沸石孔道的形式进行吸附 .介孔分子筛被首次用于催化裂解NNN ,其催化活性远远高于微孔沸石更多还原

【Abstract】 The catalytic degradation of N′-nitrosonornicotine (NNN), the representative of tobacco special N′-nitrosamines (TSNA), of which the molecular volume is much larger than the pore size of zeolites, was for the first time studied on zeolites catalysts by the use of temperature programmed surface reaction technique. NNN could be adsorbed and catalytically decomposed by zeolites. The pore structure and surface acidity of the zeolite were proven to be the important factors affecting the decomposition of NNN. Moreover, simulation reveals that NNN might adsorb on zeolite through a manner of inserting in the channel of zeolites with N-NO group. With large pore size and high surface area, mesoporous molecular sieves were firstly applied to catalytically decompose NNN and they exhibited a catalytic function much better than that of zeolites.更多还原