METHOD AND DEVICE FOR ADSORPTION/DESORPTION OF CARBON DIOXIDE FROM GAS STREAMS WITH HEAT RECOVERY UNIT

摘要

A method for separating gaseous carbon dioxide and water from a gas mixture by cyclic adsorption/desorption using a sorbent material adsorbing said carbon dioxide, using a unit (1) containing an adsorber structure (6), wherein it comprises the following repeating steps: (a)contacting said gas mixture with said sorbent material in an adsorption step; (b) at least one of evacuating said unit (1) and heating said sorbent material in a desorption step and extracting the gaseous carbon dioxide and water vapour and separating gaseous carbon dioxide from water vapour downstream of the unit (1); (c) cooling the adsorber structure (6) with said sorbent material and re-pressurisation of the unit; wherein (i) in step (c) the heat released is recovered and stored in a first heat storage device; (ii) during step (b) at least one of the sensible and latent heat of gaseous carbon dioxide and water vapour as product gases is recovered and stored in second heat storage device; and (iii) wherein during step (b) the heat required for heating said sorbent material in said unit (1) is supplied from heat recovered in at least one of step actions (i) and (ii) of previous sequence(s) of said unit (1).