The adsorption principle of molecular sieve mainly includes physical adsorption and chemical adsorption:

Physical adsorption: The surface of molecular sieve has a certain charge, and it interacts with gas or liquid molecules through van der Waals force to adsorb molecules on the surface. This adsorption is reversible, and the adsorbent can be desorbed from the surface of molecular sieve.

Chemical adsorption: The surface of molecular sieve has a certain chemical activity, which can react chemically with specific molecules to form chemical bonds. This adsorption has high selectivity and adsorption capacity, but is generally irreversible.

Factors affecting the adsorption performance of molecular sieves

Aperture size: The pore size of molecular sieve determines the type and size of molecules it can adsorb. Therefore, when selecting molecular sieves, it is necessary to select a suitable pore size according to the size and chemical properties of the target adsorbed substance.

Surface properties: The charge, chemical activity and other properties of the molecular sieve surface will also affect its adsorption performance. For example, the surface of molecular sieve is highly polar and has a strong adsorption force on polar molecules and polarizable molecules.

Operating conditions: Operating conditions such as temperature, pressure, and humidity will also affect the adsorption performance of molecular sieves. Generally speaking, lowering the temperature, increasing the pressure and increasing the humidity are beneficial to improving the adsorption performance of molecular sieves.