Porous molecular sieve

Porous molecular sieveMolecular sieves have many uniformly sized pores and neatly arranged pores in their structure. Molecular sieves with different pore sizes separate molecules of different sizes and shapes. According to the different molecular ratios of SiO2 and Al2O3, molecular sieves with different pore sizes are obtained.

The molecular sieve has a very high porosity and a large internal surface area, with internal voids accounting for about 50% of the volume. The determining factor of the adsorption performance of molecular sieve adsorbents is their own structure. In addition, different silicon aluminum ratios, equilibrium cations, pore and pore structures, as well as the formation and activation of molecular sieves, all affect the adsorption performance of molecular sieve adsorbents. Its adsorption effect mainly manifests in two aspects: selective adsorption based on the geometric size and shape of the molecule, and selective adsorption based on the polarity, unsaturation, and polarizability of the molecule.

The adsorption and separation performance depends on the size of the pore channels and pore volume of the molecular sieve; The ion exchange performance depends on the number and position of cations in the molecular sieve, as well as the passability of its pore channels; The shape selectivity exhibited during the catalytic process is related to the pore size and orientation of the molecular sieve, while the pore size or cage structure of the intermediate and final products in the catalytic reaction are related to the molecular sieve.

Porous molecular sieveThe pore shapes and sizes of different types of molecular sieves can vary greatly. The pore size and structure of the same type of molecular sieve can also have different applications in organic waste gas treatment in industries such as spray painting, printing, electronics, pharmaceuticals, rubber, injection molding, plastics, artificial marble, and chemical engineering.

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