Crystallizer devices and related systems and methods for direct air capture of co2

A method of direct air capture of carbon dioxide, the method comprising:

• providing one or more polymeric strands in contact with an alkaline capture solution, each of the polymeric strands comprised of a plurality of polymeric fibers that combine to form an outer surface of the polymeric strand, the outer surface of the strand forming a crystallizing surface;
• positioning at least a portion of the strands into an alkaline capture solution, the alkaline capture solution travelling by way of capillary force from the outer surface of the strand inwardly and from a first end of the strand in a direction towards a second end of the strand through intra-strand pores, water within the alkaline solution evaporating from the alkaline solution as the alkaline solution travels from the first end towards the second end;
• as the alkaline solution travels towards the second end, contacting the one or more polymeric strands with ambient air, KOH within the alkaline solution reacting with CO2 in the ambient air at the crystallizing surface to form K2CO3 precipitate at the crystallizing surface;
• flooding the strands with a flooding fluid to wash the K2CO3 precipitate from the crystallizing surface;
• collecting the washed K2CO3 precipitate;
• and
• introducing the washed K2CO3 precipitate into an electrochemical cell to produce carbon dioxide and KOH.

A crystallizer device comprising:

• a solution platform housing an alkaline capture solution;
• and
• a plurality of polymeric strands in contact with the alkaline capture solution, each of the polymeric strands having:
• a plurality of polymeric fibers that combine to form an outer surface of the polymeric strand, the outer surface of the strand forming a crystallizing surface, the alkaline capture solution travelling by way of capillary action from the outer surface of the strand inwardly and from a first end of the strand in a direction towards a second end of the strand through intra-strand pores, water within the alkaline solution evaporating from the alkaline solution as the alkaline solution travels from the first end towards the second end.