Adsorption and desorption apparatus

An adsorption apparatus for capturing carbon dioxide from an atmospheric air based gaseous feed stream, comprising:

• a housing enclosing at least one adsorption element for adsorbing carbon dioxide, the at least one adsorption element comprising at least one substrate having an adsorptive composite coating that comprises at least 50 wt % metal organic frameworks (MOFs) and at least one hydrophobic binder, the housing having an inlet through which the gaseous feed stream can flow to the at least one adsorption element and an outlet through which gas can flow out from the housing;
• and
• a desorption arrangement in contact with and/or surrounding the at least one adsorption element, the desorption arrangement being selectively operable between (i) a deactivated state, and (ii) an activated state in which the arrangement is configured to apply heat, a reduced pressure, or a combination thereof to the adsorptive composite coating to desorb at least a portion of the carbon dioxide from the adsorptive composite coating,
• wherein the at least one hydrophobic binder comprises at least one siloxane compound.