METHOD FOR CAPTURE OF CARBON DIOXIDE FROM AMBIENT AIR AND CORRESPONDING ADSORBER STRUCTURES WITH A PLURALITY OF PARALLEL SURFACES

摘要

A DAC method as well as a unit containing an adsorber structure (6) comprising an array of adsorber elements (5) with a support layer (3) and on both sides thereof at least one sorbent layer (1, 2), wherein the adsorber elements are parallel to each other and spaced apart forming parallel fluid passages (7) for flow-through of ambient atmospheric air and/or steam, the method comprising the following sequential and repeating steps: (a) adsorption by flow-through; (b) isolating said sorbent; (c) injecting a stream of saturated steam through said parallel fluid passages (7) and inducing an increase of the temperature; (d) extracting desorbed carbon dioxide from the unit and separating it from steam; (e) bringing the sorbent material to ambient temperature conditions wherein in step (a) the speed of the air through the adsorber structure (6) is in the range of 2-8 m/s, and wherein at least in step (d) the speed of the steam is in the range of at least 0.2 m/s.