Adsorption segment for direct air capture unit

An adsorption segment, comprising:

• a filter plate comprising a filter layer, the filter layer comprising:
• a first mesh having a first thickness, the first mesh defining a plurality of first flow passages through the first thickness, the plurality of first flow passages configured to allow passing through an air flow;
• a second mesh having a second thickness, the second mesh defining a plurality of second flow passages through the second thickness, the plurality of second flow passages configured to allow passing through the air flow, the second mesh bonded with the first mesh to define a plurality of pockets, each pocket separated from the remaining pockets;
• a sorbent positioned in each pocket and configured to adsorb carbon dioxide from the air flow;
• and
• a frame, the filter plate being folded in the frame, wherein the frame comprises:
• a first closed side,
• a second closed side opposite to the first closed side in a width direction,
• a first open side,
• a second open side opposite to the first open side in a length direction,
• wherein the filter plate is installed in the length direction, the plurality of pockets are partially filled with the sorbent which defines a cavity (902) within each of the plurality of pockets,
• wherein the frame includes a plurality of first rods disposed at the first open side between the first closed side and the second closed side,
• a plurality of second rods disposed at the second open side between the first closed side and the second closed side, wherein the filter plate is a single continues plate and is folded alternatively over the plurality of first rods and the plurality of second rods forming an undulating profile.