Carbon dioxide capture systems, devices, and methods

A direct-air-capture (DAC) system, comprising:

• a carbon dioxide capture device comprising:
• a blade configured to undergo a rotary motion around a rotation axis, the blade comprising a support base, an inlet, an outlet, and an air-permeable layer, wherein:
• the support base and the air-permeable layer collectively forming a gap through which a capture solution flows, driven by the rotary motion of the blade, between the inlet and the outlet,
• the support base comprises a plurality of surface features configured to distribute the capture solution across the support base while the capture solution flows through the gap,
• the air-permeable layer is configured to allow air to enter the gap and contact the capture solution, and
• the capture solution is configured to extract carbon dioxide in the air by converting the carbon dioxide to an aqueous salt while the capture solution flows through the gap,
• a capture solution storage device configured to store the capture solution,
• an inlet assembly in fluid communication with the blade via the inlet of the blade and configured to feed the capture solution from the capture solution storage device to the blade through the inlet of the blade,
• an outlet assembly in fluid communication with the blade via the outlet of the blade and configured to guide the capture solution leaving the blade via the outlet of the blade to return to the capture solution storage device, and
• a rotation assembly configured to cause the rotary motion of the blade, and
• an electrodialysis bipolar membrane (EDBM) device configured to regenerate the capture solution that includes the aqueous salt.

A blade comprising a support base, an inlet, an outlet, and an air-permeable layer, wherein:

• the blade is configured to undergo a rotary motion around a rotation axis,
• the support base and the air-permeable layer collectively form a gap through which a capture solution flows, driven by the rotary motion of the blade, between the inlet and the outlet,
• the support base comprises a plurality of surface features configured to facilitate the capture solution to distribute on the support base while the capture solution flows through the gap,
• the air-permeable layer is configured to allow air to enter the gap and contact the capture solution, and
• the capture solution is configured to extract carbon dioxide in the air while the capture solution flows through the gap.

A blade, comprising:

• a support base, an inlet, an outlet, and an air-permeable layer, wherein:
• the blade is configured to undergo a rotary motion around a rotation axis,
• the inlet and the outlet are positioned on opposite ends of a diagonal of the support base,
• the support base has a first edge and a second edge that are on opposite sides of the diagonal of the support base and at an angle with each other,
• the support base and the air-permeable layer collectively form a gap through which a capture solution flows, driven by the rotary motion of the blade, between the inlet and the outlet,
• the support base comprises a plurality of surface features configured to facilitate the capture solution to distribute on the support base while the capture solution flows through the gap, the plurality of surface features comprising a first group that includes at least one first ridge or wall substantially parallel to the first edge, a second group that includes at least one second ridge or wall substantially parallel to the second edge, a third group that includes at least one third ridge or wall substantially perpendicular to the diagonal of the support base, a fourth group that includes at least one fourth ridge or wall at an oblique angle with the first edge or the second edge, and a fifth group that includes at least one fifth ridge or wall of a substantially semi-circle shape, or a portion thereof,
• the air-permeable layer is configured to allow air to enter the gap and contact the capture solution, and
• the capture solution is configured to extract carbon dioxide in the air while the capture solution flows through the gap.