What are the properties of zeolite molecular sieve？

Properties of zeolite molecular sieves:

1.Adsorption performance

The adsorption of zeolite molecular sieve is a physical change process. The reason for adsorption is mainly molecular gravitational force on the surface of the solid produced a "surface force", when the fluid flows through, some molecules in the fluid due to irregular movement and collision to the surface of the adsorbent, molecular aggregation on the surface, so that the number of such molecules in the fluid is reduced to achieve the purpose of separation and removal.

As the adsorption does not occur chemical changes, as long as you try to concentrate the molecules on the surface of the molecular drive away, zeolite molecular sieve and have the ability to adsorb, this process is the inverse process of adsorption, called resolution or regeneration.

Due to the uniform pore size of zeolite molecular sieve, only when the molecular dynamics of the diameter is smaller than the zeolite molecular sieve pore size can easily enter the interior of the crystal cavities and adsorption, so the zeolite molecular sieve for gas and liquid molecules is like a sieve, according to the size of the molecules to decide whether to be adsorbed.

Due to the zeolite molecular sieve cavities there is also a strong polarity, can contain polar groups with molecules on the surface of the zeolite molecular sieve with a strong role, or by inducing the molecules that can be polarised to polarise and thus produce a strong adsorption.

This polar or easily polarised molecules are easily adsorbed by polar zeolite molecular sieves reflects another adsorption selectivity of zeolite molecular sieves. 

2.Catalytic performance

Zeolite molecular sieves have a unique regular crystal structure, each of which has a certain size and shape of the pore structure, and has a large specific surface area.

Most zeolite molecular sieves have strong acid centres on their surfaces, while the crystal pores are polarized by a strong Coulomb field. These properties make it an excellent performing catalyst.

Multiphase catalytic reactions are carried out over solid catalysts and the catalytic activity is related to the size of the crystalline pores of the catalyst. When zeolite molecular sieves are used as catalysts or catalyst carriers, the catalytic reaction is controlled by the size of the zeolite molecular sieve crystal pores. The size and shape of the crystal pores and pore channels can play a selective role in the catalytic reaction. Under general reaction conditions zeolite molecular sieves play a dominant role in the direction of the reaction, presenting a selective catalytic performance, this performance makes zeolite molecular sieves as a new catalytic material has a strong vitality.