PRESSURE SWING ADSORPTION METHOD AND SYSTEM FOR REMOVAL OF CO2 FROM AIR

Abstract: a method for refining carbon dioxide from an input mixed gas stream comprising carbon dioxide, the method comprising; introducing a compressed first portion of the input mixed gas stream into a first adsorption vessel containing carbon dioxide sorbent material to provide a first compressed gas mixture within the first adsorption vessel; venting, from the first adsorption vessel, a carbon dioxide depleted fraction of the first compressed gas mixture; venting, from the first adsorption vessel, an intermediate fraction of the first compressed gas mixture; venting, from the first adsorption vessel, a carbon dioxide enriched fraction of the first compressed gas mixture, wherein the intermediate fraction of the first compressed gas mixture has a concentration of carbon dioxide higher than that of the input gas mixture but lower than that of the enriched fraction of the first compressed gas mixture; collecting the carbon dioxide enriched fraction of the first compressed gas mixture; introducing the intermediate fraction of the first compressed gas mixture and a compressed second portion of the input mixed gas stream into a second adsorption vessel containing carbon dioxide sorbent material to provide a second compressed gas mixture within the second adsorption vessel; venting, from the second adsorption vessel, a carbon dioxide depleted fraction of the second compressed gas mixture; venting, from the second adsorption vessel, a carbon dioxide enriched fraction of the second compressed gas mixture; and collecting the carbon dioxide enriched fraction of the second compressed gas mixture.

Inventor(s): Peter HANDFORD-STYRING, George Richard Michael DOWSON

CPC Classification: B01D53/053 (with storage or buffer vessel)

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