Description
Molecular sieve is a kind of aluminosilicate crystal. Because the pore size of zeolite molecular sieve is uniform, only when the molecular dynamics diameter is smaller than that of zeolite molecular sieve can it easily enter the cavity and be adsorbed. Therefore, zeolite molecular sieve is like a sieve for gas and liquid molecules. According to the size of the molecule to determine whether to be adsorbed. Because the zeolite molecular sieve has strong polarity in the crystalline cavity, it can interact with the molecules containing polar groups on the surface of the zeolite molecular sieve, or by inducing the polarization of the polarizable molecules to produce strong adsorption. This kind of polar or easily polarized molecule is easily adsorbed by polar zeolite molecular sieve, which reflects another adsorption selectivity of zeolite molecular sieve.
There are two main methods of molecular sieve regeneration: heating and high temperature regeneration and vacuum regeneration. Since the adsorption does not cause chemical changes, as long as you try to drive off the molecules that are concentrated on the surface, the zeolite molecular sieve has adsorption capacity again. This process is the reverse process of adsorption, called activation, or desorption or regeneration. Molecular sieve activation refers to the process in which adsorbates such as moisture adsorbed by the molecular sieve are driven out of the molecular sieve through high-temperature heating or vacuuming, so that the molecular sieve can restore the adsorption capacity.
