What is the difference between molecular sieve and zeolite?
With different characteristics, zeolite has a glass-like luster and can re-absorb water or other liquids. Molecular sieves have the advantages of high adsorption capacity and strong thermal stability that other adsorbents do not have.
How many molecular sieves are contained in an oxygen concentrator?
There are two main types of zeolite molecular sieves for oxygen concentrator in market, sodium type and lithium type molecular sieve.
Which zeolite is best for oxygen concentrator?
For mobile oxygen concentrators, zeolite 13X is used to adsorb nitrogen under pressure of 20 psi/~1.4 bar at ambient temperature. Oher zeolites used in nitrogen adsorption are zeolite 4A, 5A, LiAgX, LiLSX, and 10X.
What is zeolite molecular sieves?
Molecular sieves (zeolites) are artificially prepared alkali metal aluminosilicates. For gas–solid chromatography, the most common types are calcium aluminosilicate (type 5A) with an effective pore diameter of 0.5 nm and sodium aluminosilicate (type 13X) with an effective pore diameter of 1 nm.
Why zeolites are used as molecular sieves?
Molecular sieve adsorbents are crystalline aluminosilicates, known as zeolites. Their unique structure allows the water of crystallization to be removed, leaving a porous crystalline structure. These pores, or cages, have a high affinity to re-adsorb water or other polar molecules.
How do I choose A molecular sieve?
Selecting molecular sieves Molecular sieves are available in different shape and sizes. But the spherical beads have advantage over other shapes as they offer lower pressure drop, are attrition resistant as they do not have any sharp edges, and have good strength, i.e. crush force required per unit area is higher.
What is molecular sieve in oxygen concentrator?
The oxygen concentrator’s molecular sieve is used to absorb all the gases. The principle of Rapid Pressure Swing Adsorption is used here where the nitrogen in the atmosphere gets absorbed by the Zeolite present in the molecular sieve.
What is oxygen zeolite?
Zeolite performs the chemistry of separating oxygen from nitrogen in the air. Being highly porous, zeolite beads have a surface area of about 500 square meters per gram. At high pressures in the column, nitrogen is in a tight embrace, chemically speaking, with the zeolite.
Do molecular sieves expire?
Once activated, the sieves can be stored in a glass container with a double wrapped parafilm. This will keep them activated for up to six months.
What is the advantage of zeolite process?
Advantages of zeolite process: (i) it removes the hardness almost completely and water of about l0 ppm hardness is produced. (ii) The equipment used is compact, occupying a small space. (iii) No impurities are precipitated, so there is no danger of sludge formation in the treated-water at a later stage.