The present invention provides a new acidic gas adsorbent suitable for adsorption of acidic gas. An acidic gas adsorbent of the present invention includes a porous sheet including a polymer. The polymer has an amino group. The porous sheet has a three-dimensional network skeleton composed of the polymer. A structure of the present invention includes the acidic gas adsorbent and an air flow path. An acidic gas adsorption device of the present invention includes an adsorption part having a gas inlet and a gas outlet. The adsorption part contains the acidic gas adsorbent.

A method for removing a target impurity substance from a main process flow by a regenerate material and associated systems are provided. In some embodiments, the method includes (1), directing an input flow from the main process flow to a parallel structure of components; (2) introducing the regenerate material, by the parallel structure, to the input flow to generate an impurity laden regenerate flow; (3) cooling the impurity laden regenerate flow to generate a cooled regenerate flow; (4) cleaning up the cooled regenerate flow to generate a clean regenerate flow.

In an example, a method of butadiene sequestration includes receiving an input stream that includes butadiene. The method includes directing the input stream to a first sulfur dioxide charged zeolite bed for butadiene sequestration via a first chemical reaction of butadiene and sulfur dioxide to form sulfolene.

The present invention relates to a system for capturing carbon dioxide from an air stream. The system includes a carbon dioxide capturing unit that includes a humidity/temperature adjusting unit with an evaporative cooling unit and a CO.sub.2 adsorbing unit. The CO.sub.2 adsorbing unit includes a sorbent column made of polyamine-Cu (II) complex resin. The humidity/temperature adjusting unit receives air stream from ambient atmosphere and process the air stream to obtain a humidity-adjusted air stream. The CO.sub.2 adsorbing unit receives the humidity-adjusted air stream to pass through the sorbent column. The sorbent column selectively adsorbs the CO.sub.2 from the humidity-adjusted air stream. The sorbent column is regenerated using an alkaline stream to separate the adsorbed CO.sub.2 from the sorbent column.

Direct air capture of a gas followed by liquid phase desorption includes contacting a sorbent material with a gas and chemically reacting gas molecules with the sorbent material. The chemical reaction is reversed in a liquid phase environment so as to release gas molecules and regenerate the sorbent while the sorbent material remains in the liquid phase environment. Finally, the desorbed gas molecules are captured for sequestration.

A system and method for passive collection of atmospheric carbon dioxide is disclosed. The system includes a harvest chamber having a first opening and a sorbent regeneration system. The system also includes a capture body coupled to and movable by a support structure. The capture body includes a sorbent material and is movable by the support structure to be in a collection configuration wherein at least a portion of the capture body is in contact with a natural airflow outside the harvest chamber such that atmospheric carbon dioxide is captured by the sorbent material, and a release configuration wherein at least a portion of the capture body holding captured carbon dioxide is operated upon by the regeneration system inside the harvest chamber such that captured carbon dioxide is released to form an enriched gas.

An integrated adsorption cooling and vacuum dehumidification system (IAdCVD) is provided, including a vacuum section, an evaporator, an adsorption chamber, a condenser, a desorption chamber, and a MCV and an expansion valve. The vacuum section comprises a selective (say hydrophilic) membrane. The evaporator is connected to a low-pressure side to establish a water vapor pressure difference across the selective membrane. The adsorption chamber communicates with the evaporator. The desorption chamber communicates with the condenser. The condenser is configured to convert the water vapor migrated from the desorption chamber into a condensed water. The condensed water in the condenser is directed to the evaporator by passing through the MCV and the expansion valve in sequence, and the condensed water directed to the evaporator enters the evaporator via a first port different from a second port for connecting the evaporator to a chilled water supply.

A system includes a gas treatment system having an adsorption module, wherein the adsorption module includes one or more sorbent cartridges having a sorbent material. The gas treatment system further includes a linear positioning assembly configured to move the adsorption module along a linear path of travel between a first position in a first flow path and a second position in a second flow path. The gas treatment system is configured to adsorb an undesirable gas from a first fluid flow in the first flow path into the sorbent material when the adsorption module is disposed in the first position. The gas treatment system is configured to desorb the undesirable gas from the sorbent material when the adsorption module is disposed in the second position.

A system and method for passive collection of atmospheric carbon dioxide is disclosed. The system includes a harvest chamber having a first opening and a sorbent regeneration system. The system also includes a capture body coupled to and movable by a support structure. The capture body includes a sorbent material and is movable by the support structure to be in a collection configuration wherein at least a portion of the capture body is in contact with a natural airflow outside the harvest chamber such that atmospheric carbon dioxide is captured by the sorbent material, and a release configuration wherein at least a portion of the capture body holding captured carbon dioxide is operated upon by the regeneration system inside the harvest chamber such that captured carbon dioxide is released to form an enriched gas.

A system and method for the efficient collection of CO.sub.2 is disclosed. The system includes a subsystem having a condenser and a vaporizer, and a plurality of vessels each having a sorbent and configured to transition between gas collection, gas recovery, and heat recovery phases. The gas collection phase includes the sorbent absorbing CO.sub.2. The gas recovery phase has N stages, the vessels releasing a product gas and receiving vapor causing captured CO.sub.2 to desorb. The first (N1) gas recovery stages include the vessel coupled to the subsystem at a downstream pressure and a vessel in the heat recovery phase at an upstream pressure. The Nth gas recovery stage includes the vessel coupled to the condenser at the downstream pressure and the vaporizer at the upstream pressure. The heat recovery phase has (N1) stages, each including the vessel being coupled to a vessel in the gas recovery phase.