2，6—二甲基吡啶在Y型分子筛的Bronsted和Lewis酸中心上的吸附动力学

STUDIES ON THE ADSORPTION KINETICS OF 2,6-LUTIDINE ON BRONSTED AND LEWIS ACID SITES OF Y ZEOLITE

２，６—二甲基吡啶在Ｙ型分子筛的Ｂｒｏｎｓｔｅｄ和Ｌｅｗｉｓ酸中心上的吸附动力学董玉林，杨孔章（山东大学胶体与界面化学研究所，济南２５０１００）关键词Ｙ型分子筛，酸中心，Ｌｅｗｉｓ酸中心，２，６—二甲基吡啶，吸附动力学沸石分子筛是一类固体酸催化剂，在...

he adsorption kinetics of 2.6-lutidine on Brdnsted and Lewis acid sites of Y zeolite was studied by an infrared-weight method. The results show that there are two kinds of Bronsted acid sites on Y zeolite surface, one is stronger than the another, they obey langmuir rate equation for the adsorption of 2,6-lutidine,at 295 K their rate constants of adsorption are 1.93×10-5mmol g-1 s-l Pa-1 and 1.49×10-5 mmol g-1 s-l Pa-1 respectively.In the case of Lewis acid sites, it is shown that the adsorption of 2,6-lutldine is nonlocalized and the rate equation is da/dt=kθ.