Anybody knows what type of zeolite is use in oxygen concentrators and what is their saturation rate?

Answer 1

Synthetic zeolite is used for the production of oxygen. It consists of a rigid framework of silica and aluminium with an extra cation of calcium or sodium to make up the missing positive charge in the structure.

The concentrator needs 300 watts AC power. Adsorption efficiency is enhanced by a modest increase in operating pressure and takes place at a pressure of 20 PSI (140KPa). After about 20 sec the supply of compressed air is automatically diverted to the second canister where the process is repeated enabling uninterrupted output of O2. While the pressure in the second canister is at 20 PSI, the pressure in the first canister is reduced to zero. This allows discharging most of the adsorbed N from the zeolite to the atmosphere. The zeolite is then regenerated and ready for the next cycle. As the second column approaches saturation, the process is reversed. By alternating the pressure in the two canisters a constant supply of O2 is produced while the zeolite is continually being regenerated. Individual units have an output of up to 5 L•min–1 with an O2 concentration of up to 95%. Higher flows result in a loss of concentration, and most machines are flow-limited to prevent this from occurring. The gas emerging from the columns normally is composed of 95% O2 and 5% argon. This gas passes into a small reservoir chamber, and then through a flow control system to the patient.

The life of the zeolite crystal can be expected to be at least 20,000 hr, which in most situations would give about ten years of use. Routine maintenance consists merely of changing the filters at regular intervals as directed by the manufacturer. This can be achieved easily, using skills available locally. If recommendations are followed, the unit requires no other attention and will continue to function for many years.

Answer 2

Zeolite Oxygen Concentrator