【摘要】 以含有次级孔的沸石的晶内扩散为研究对象,对来源于同一NaY母体的一组改性Y型沸石,进行了孔结构分析和正戊烷的扩散系数的测定。得到了具不同次级孔量的Y型沸石晶内扩散性能变化的规律。并采用随机游动方法对实际的Y型沸石晶内扩散进行模拟,得到了与实验测定一致的结果,从而可以对有次级孔的Y型沸石的晶内扩散做定量的估计。更多还原

【Abstract】 The present study relates to the intracrystalline diffusion in zeolite with secondary pores. Porous structure analyses and measurement of diffusivities of n-pentane are carried out on samples originated from the same type of NaY zeolite. The change of intracrystalline diffusivity of the zeolites with different secondary pores is investigated, and random walk simulation method is applied to the samples of same type. The results agree with the experimental data. Thus the intracrystalline diffusivities of zeolites with secondary pores can be estimated quantitatively.更多还原