Displacement purge adsorption process for separating CO2 from another gas

Abstract

The present invention concerns a process for the separation of a gas mixture containing CO2 and at least one inert gaseous species, comprising (a) feeding the gas mixture into an adsorption column via a first inlet located at a first side of the column, wherein the adsorption column contains a solid CO2 sorbent loaded with H2O molecules and thereby desorbing H2O molecules and adsorbing CO2 molecules, to obtain a sorbent loaded with CO2 and an inert product stream; and then (b) feeding a stripping gas comprising H2O into the adsorption column via a second inlet located at a second side which is opposite to the first inlet, thereby stripping the sorbent and desorbing CO2 molecules and adsorbing H2O molecules, to obtain a sorbent loaded with H2O and the CO2 product stream, wherein the adsorption column is re-used in step (a) after being stripped in step (b). The invention also concerns an apparatus for performing the process according to the invention.

Dependencies are inferred from the claim text.