CONTROL SCHEME FOR HYBRID PSA/TSA SYSTEMS

摘要

AN IMPROVED CONTROL SCHEME IS SET FORTH FOR AN ADSORPTION PROCESS THAT REMOVES WATER AND CARBON DIOXIDE (CO2) FROM A FEED GAS (12) USING A HYBRID OF BOTH TEMPERATURE SWING (I.E.TSA) AND PRESSURE SWING (PSA) TO REGENERATE THE ADSORBENT. THE CONTROL SCHEME COMPRISES ADJUSTING THE QUANTITY OF HEAT TO BE PROVIDED BY THE REGENERATION GAS A FUNCTION OF TEMPERATURE DATA TAKEN WITHIN A STRATEGIC PORTION OF THE WATER SELECTIVE ADSORBENT ZONE. THE STRATEGIC PORTION CORRESPONDS TO THE LOCATION FOR THE DESIRED TRANSITION FROM REGENERATION BY TEMPERATURE SWING, TO REGENERATION BY PRESSURE SWING. IN A PREFERRED EMBODIMENT OF THE PRESENT INVENTION, SAID QUANTITY OF REGENERATION HEAT IS ALSO ADJUSTED AS A FUNCTION OF THE WATER CONTENT OF THE FEED GAS (12).