Oxygen Generator

An oxygen generator is a series of machine that separates oxygen from compressed air using special selective adsorptive technology called pressure swing adsorption (PSA). The compressed air used in the oxygen generation process has a similar composition to ambient environmental air with 21% oxygen and 78% nitrogen 1% other gases.

Pressure Swing Adsorption (PSA)

Pressure Swing Adsorption (PSA) is a widely used separation and purification process in the field of chemical engineering. It is typically employed to separate specific gases from a mixture, such as separating nitrogen from air or hydrogen from a gas mixture. Here’s how PSA works:

Adsorption: PSA operates on the principle of adsorption. It uses a solid adsorbent material, usually in the form of a bed of pellets or beads, which has a strong affinity for certain gases. In the case of separating nitrogen from air, for example, the adsorbent material might preferentially adsorb oxygen.

Adsorption Stage: A mixture of gases is passed through the bed of adsorbent material at an elevated pressure. Because the adsorbent has a stronger affinity for one of the gases in the mixture (e.g., oxygen in the case of air separation), it will adsorb more of that gas than the others. This causes the desired gas to accumulate in the adsorbent material while the less preferred gases pass through.

Desorption (Regeneration) Stage: After the adsorbent bed becomes saturated with the target gas, the pressure is reduced. This reduction in pressure causes the adsorbent material to release the adsorbed gas (e.g., oxygen) and become ready for another cycle. The released gas is collected as the desired product.

Repeat: The cycle of adsorption and desorption is repeated continuously. While one bed is adsorbing gas, another is being regenerated. This cyclic operation allows for a continuous supply of the desired gas.

Pressure Swing Adsorption is particularly useful for gas separation because it doesn’t require the use of a liquid solvent (as in some other separation methods like absorption) and can achieve high purity levels for the separated gas. It’s commonly used in applications such as nitrogen generation, hydrogen purification, and carbon dioxide removal from natural gas, among others.

Diamond Optimum Reliability