Rotary bed for direct capture of CO2 from air

A method of sorbing CO2, comprising:

• rotating a wheel framework structure that supports a sorbent bed, the sorbent bed comprising a support material comprising one or more monoliths and a sorbent having selectivity for sorption of CO2 supported on the support material,
• the support material comprising a first surface, a second surface, and a plurality of channels providing a flow path between a first surface of the support material and a second surface of the support material, at least a portion of the sorbent being supported on one or more surfaces within the plurality of channels;
• exposing a first gas flow comprising 15 vol % to 25 vol % O2 and 100 vppm to 650 vppm CO2 to a first portion of the sorbent bed outside of the desorption zone volume, the first gas flow having a temperature of 0° C. to 40° C.;
• exposing a plurality of gas flows to a second portion of the sorbent bed within the desorption zone volume, the desorption zone volume defined by at least one cover plate and one or more cover plate seals, the one or more cover plate seals providing a) a seal between the at least one cover plate and the first surface of the support material, b) a seal between the at least one cover plate and the second surface of the support material, or c) a combination thereof, the exposing a plurality of gas flows to the second portion of the sorbent bed comprising sequentially exposing the second portion of the sorbent bed to:
• a purge gas flow to form a purge exhaust, and
• a steam flow having a temperature of 80° C. to 180° C. to form a CO2-containing output flow,
• wherein the rotating of the wheel framework structure changes the portions of the sorbent bed that correspond to the first portion of the sorbent bed outside of the desorption zone volume and the second portion of the sorbent bed within the desorption zone volume.