Sepcor Molecular Sieves for Medical Oxygen Purification

Adsorbents for Medical Oxygen Generators through Pressure Swing Adsorption



Medical Oxygen


Medical Oxygen concentrators provide oxygen for patients through the use of Pressure Swing Adsorption (PSA).  Oxygen generating Molecular Sieves are specially designed for this application. Nitrogen is adsorbed into the pores and then desorbed and vented off.  This leaves purified oxygen as the product.  PSA technology is a reliable and economical technique for small to mid-scale oxygen generation.  Molecular sieves for this application can range from 8x12 to 60x80 mesh.  Sieves designed for this application are typically of the 13X or LiX type.


An oxygen concentrator operates on fast cycling Pressure Swing which lasts about 3 seconds. During that time the pressure  increases to about 1.5 times normal atmospheric pressure and the molecular sieve becomes saturated with nitrogen.  High purity oxygen is the result at the effluent of the unit.


Older units cycle longer at a period of  20 seconds, and provide up to 5 litres per minute of 90 percent plus oxygen.  Modern units are capable of supplying up to 10 literes per minute of 90 percent oxygen.