Adsorption function: The adsorption of substances by molecular sieve comes from physical adsorption (van der Waals force), and their crystal pores have strong polarity and Coulomb field, exhibiting strong adsorption ability for polar molecules (such as water) and unsaturated molecules.

Sieving function of Molecular Sieve

The pore size distribution of molecular sieves is very uniform, and only substances with a molecular diameter smaller than the pore diameter can enter the crystal pores of the molecular sieve.

By distinguishing molecules of different substances base on their adsorption priority and size, they are vividly refer to as “molecular sieves”.

Characteristics of Molecular Sieves

Molecular sieves have extremely strong moisture absorption ability and used for gas purification treatment. When storing, direct exposure to air should avoid. Molecular sieves that have stored for a long time and have already absorbed moisture should regenerate before use. Molecular sieves should avoid oil and liquid water. When using, try to avoid contact with oil and liquid water as much as possible. The gases used for drying in industrial production include air, hydrogen, oxygen, nitrogen, argon, etc

Due to the strong affinity of molecular sieves for water, they are used for deep dehydration in the laboratory with extremely high drying efficiency (if the moisture content of the material to be dried is high, other desiccants should be used for dehydration first). The moisture content of dried gases and liquids is generally less than 10ppm. Molecular sieves used for drying are generally regenerated by heating at a temperature between 180 and 350 degrees Celsius.