Molecular sieve 3A, also known as molecular sieve KA, with an aperture of about 3 angstroms, can be used for drying of gases and liquids as well as the dehydration of hydrocarbons. It' s also widely used for the complete drying of petrol，cracked gases, ethylene, propylene and natural gases. The working principle of molecular sieves is mainly related to the pore size of molecular sieves, which are 0.3nm/0.4nm/0.5nm respectively. They can adsorb gas molecules whose molecular diameter is smaller than the pore size. The larger the size of the pore size, the greater the adsorption capacity. The pore size is different, and the things that are filtered and separated are also different. In simple terms, 3a molecular sieve can only adsorb molecules below 0.3nm, 4a molecular sieve, the adsorbed molecules must also be less than 0.4nm, and 5a molecular sieve is the same. When used as a desiccant, a molecular sieve can absorb up to 22% of its own weight in moisture.
