A METHOD AND ARRANGEMENT FOR CAPTURING CARBON DIOXIDE FROM A GAS STREAM USING AN ADSORPTION SYSTEM COMPRISING A HEAT STORAGE AND RECOVERY UNIT

摘要

It is described a method and arrangement for capturing CO2 from ambient air or flue gases, wherein a pre-cooled stream of said air/gases is conducted through a bed (34) of CO2 adsorbent material in a first direction capturing CO2 from the streamed air/gas in the CO2 adsorbent bed, a stream of warm heating gas is conducted from a heat storage unit (66) to said CO2 adsorbent bed (34) in a second direction opposite said first direction transferring stored heat from said heat recovery unit to said CO2 adsorbent bed, while simultaneously transferring coldness from the adsorbent bed to the heat storage, and following this, said heating gas is conducted through the CO2 adsorbent bed in a closed loop desorbing CO2 from the CO2 adsorbent bed, the desorbed CO2 is extracted for use or storage, next a stream of cooling gas is conducted through the heat storage unit and the CO2 adsorbent bed in the first direction transferring low temperature heat to the CO2 adsorbent bed and high temperature heat from the CO2 adsorption bed to the heat storage unit.