Pressure Swing Adsorption

Pressure Swing Adsorption (PSA) is a gas purification technology that uses selective adsorption and desorption processes to separate gas species. The PSA system contains adsorbent materials such as zeolites, activated carbon, or molecular sieves that preferentially adsorb target gas contaminants at elevated pressures. The process operates in cycles where the feed gas enters at high pressure, contaminants adsorb to the media, and the purified product gas exits. Then during regeneration, the system pressure is reduced allowing the adsorbed contaminants to desorb from the media and be purged from the system. This cyclic pressure swing regenerates the adsorbent bed while producing a constant purified product flow. PSA systems are customizable with multiple adsorbent beds and steps to remove various contaminants like CO2, H2S, siloxanes, and N2 from biogas or syngas streams. They can also purify H2 by adsorbing impurities like CH4, CO2, and CO to produce high purity hydrogen. PSA technology provides a flexible, low maintenance solution for gas upgrading and purification without any water usage or waste products. The compact, modular PSA units have low installation costs and provide reliable, continuous operation in a wide range of applications.