Pressure Swing Adsorption (PSA) is a process to separate gases from a mixture. PSA takes advantage of the fact that a variety of gas mixes will adhere to (or “adsorb” onto) a solid substrate at different rates or amounts under pressure. https://guninaengineers.wordpress.com/2025/06/03/how-psa-technology-works-in-nitrogen-and-oxygen-generation/