Adsorption, drying and screening functions of molecular sieves

1. Adsorption function:
Molecular sieves are mainly driven by molecular gravity to produce a "surface force" on a fixed surface. When the fluid flows through, some molecules in the fluid will make irregular movements and collide with the surface of the adsorbent. Molecules are concentrated on the surface, and during the overall collision motion, the number of molecules is reduced, thereby achieving separation.
Because molecular sieves have strong polarity and Coulomb fields inside their crystal pores, they show strong adsorption capacity for polar molecules (such as water) and unsaturated molecules.
2. Drying function:
The crystal cavities of molecular sieves also have strong polarity, which can interact strongly with molecules containing polar groups on the surface of zeolite molecular sieves, or induce polarization of polarizable molecules to produce strong adsorption. Because molecular sieves have strong adsorption capacity for water and carbon dioxide, during molecular sieve desulfurization, molecular sieves have strong adsorption capacity for polar small molecules such as water.
3. Screening function:
Its pore size distribution is very uniform and neat. Only substances with a molecular diameter smaller than the hole diameter will enter the crystal holes of the molecular sieve. Thus, various types of molecular sieves are separated.
The types of molecular sieves are divided into types 3a, 4a, 5a, etc. When used in different industry fields and to achieve different effects, the correct selection should be based on the performance of different products.