Pressure Swing Adsorption (PSA) is a technology used to separate gases from a mixture based on their different adsorption properties. In this process, a gas mixture is passed through a bed of adsorbent material, which captures specific gases while allowing others to pass through. By changing the pressure in the system, the adsorbed gases can be released and collected, allowing for the purification of the desired gas. PSA is commonly used in various industries, including the production of oxygen and nitrogen from air. The method is efficient and cost-effective, making it a popular choice for applications such as hydrogen production and natural gas processing.