分子筛效应——分子筛具有大小均一、排列整齐的许多微孔，...

分子筛效应——分子筛具有大小均一、排列整齐的许多微孔，分子有效直径小于孔径的气体分子可进入孔内，被吸附在内表面上，分子直径大于孔径的则不能进入，即相当于用筛子（固定网眼大小）把气体分子选一遍，分子筛亦由此得名。水的分子直径（3.2Å，2.76Å）比通常所用分子筛的孔径小。Effects of molecular sieve, molecular sieve size uniform, neat rows of many microporous molecular effective diameter less than the gas molecules can enter the hole of the aperture, be adsorbed on the surface, molecular diameter aperture cannot enter, which is equivalent to the gas molecules with sieve (fixed mesh size) to choose again, molecular sieve and hence the name. The molecular diameter of water (3.2a, 2.76a) is smaller than that of molecular sieves commonly used.