There are many types of molecular sieves and can be classified according to different standards:

According to catalytic properties:

Acid catalyst: Catalytic reaction is carried out using the acidity of the surface of molecular sieve.

Dual-function catalyst: After the molecular sieve is supported by platinum, palladium and other metals, it has both metal catalytic functions and acid catalytic functions.

Shape selection catalyst: The pore size and pore structure of the molecular sieve have a significant impact on catalytic activity and selectivity, and can carry out catalytic reactions based on the geometric size of reactants, products or intermediates.

By chemical composition:

Type A molecular sieve: such as 3A (potassium A), 4A (sodium A), 5A (calcium A), etc., which are mainly used for drying gases and liquids.

X-type molecular sieve: such as 10X, 13X, etc., with a large pore size, suitable for adsorption and separation of larger molecules.

Y-type molecular sieve: macroporous zeolite, widely used in catalytic cracking, hydrocracking and other processes in petrochemical industry.

ZSM series molecular sieve: such as ZSM-5, ZSM-11, etc., with unique pore structure and catalytic properties.

According to the size of the channel:

Microporous molecular sieve: The pore size is less than 2 nanometers, such as A, X, Y, etc.

Mesoporous molecular sieve: The pore size is between 2 and 50 nanometers.

Large pore molecular sieve: pore size is greater than 50 nanometers.