What are molecular sieves made of? Molecular sieves are crystalline metal aluminosilicates having a threedimensional interconnecting network of silica and alumina tetrahedra. Natural water of hydration is removed from this network by heating to produce
What are molecular sieves made of?
Molecular sieves are crystalline metal aluminosilicates having a threedimensional interconnecting network of silica and alumina tetrahedra. Natural water of hydration is removed from this network by heating to produce uniform cavities which selectively adsorb molecules of a specific size.
What is 13X zeolite?
Zeolite 13X is the most commonly used adsorbent in the air separation for oxygen production. Zeolites are aluminosilicate crystallines of alkaline or earth alkaline elements such as sodium, potassium and calcium.
How do you make zeolite 13X?
Generally, the 13X zeolite is prepared by sodium aluminosilicate gels, using a wide range of silica and alumina sources via hydrothermal synthesis route.
Is desiccant the same as silica?
Silica gel is a granular, vitreous, porous form of silicon dioxide made synthetically from sodium silicate. Used as a desiccant, it works by a process called adsorption. If the silica gel desiccant is heated to ~180°F, it will release the trapped water. This process is called regenerating the desiccant.
Why do we use molecular sieves?
Molecular sieves are used for drying gases and liquids and for separating molecules on the basis of their sizes and shapes. When two molecules are equally small and can enter the pores, separation is based on the polarity (charge separation) of the molecule, the more polar molecule being preferentially adsorbed.
How long do molecular sieves take to work?
Add molecular sieves of about 3 to 4 times of the calculated amount of the organic solvent, and leave it for about 24 hours with occasional stirring. The time varies depending on the type of solvent, but leave it a few days if it is hard to dry.
Why does zeolite adsorb nitrogen?
The selectivity for zeolite adsorbents to adsorb nitrogen compared to oxygen is due to the interaction between electrostatic field of the cationic zeolite and the quadrupole moment of the nitrogen and oxygen.