High purity carbon sorbent monoliths that are particularly effective for the adsorption and subsequent desorption of trace-contaminants, such as ammonia, are produced by 3D-printing polymer monoliths, carbonizing them, and subsequently activating them to produce an effective amount of at least one type of oxygen species on exposed carbon surfaces. The high purity carbon sorbent monoliths are vacuum-regenerable on a time scale of a few minutes.

A modular valve cartridge for a regenerative air dryer including a housing having a dry air passage and a desiccant canister having a desiccant bed. The modular valve cartridge includes a cylindrial body having an air passage extending axially there through between a first opening and second opening, a first end of the cylindrical body, including the first opening, to releasably couple to the housing to place the cartridge air passage in communication with the dry air passage via the first opening, and a second end of the cylindrical body, including the second opening, to releasably couple to the desiccant canister to place the cartridge air passage in communication with the desiccant bed via the second opening. A check valve is disposed within the cartridge air passage, the check valve biased to be in a normally closed position to close the cartridge air passage and to open the cartridge air passage in response to receiving a pressurized air via the second opening.

This disclosure relates to a method that includes (1) contacting a solvent with a porous cyclodextrin-based metal organic framework (CD-MOF) adsorbed with CO.sub.2 to release CO.sub.2, and (2) collecting the released CO.sub.2. The CD-MOF includes at least a metal cation and a plurality of cyclodextrin components.

Submersible media filters and submersible columns for use in removing radioactive isotopes and other contaminants from a fluid stream, such as a fluid stream from the primary coolant loop of a nuclear reactor system or a fluid stream from a spent-fuel pool. Generally, these submersible media filters and submersible columns are adapted to be submersed in the fluid stream, and additionally the filters are adapted to be vitrified after use, resulting in a stabilized, non-leaching final waste product with a substantially reduced volume compared to the original filter. In several embodiments, the submersible media filters and submersible columns include isotope-specific media (ISM).

Embodiments discloses herein relate to methods of processing coal. A method to process coal includes subjecting raw coal to a liquefaction process effective to form a liquid pitch resin and subjecting the liquid pitch resin to a filtration process. The method further includes subjecting the liquid pitch resin to a low crystallinity spinning process to form a raw fiber. The raw fiber is then further subjected to a stabilization process configured to oxygen cross-link the fiber to form a stabilized fiber and then subjecting the stabilized fiber to a carbonization process to form a low thermal conductivity carbon fiber.

The present invention relates to a system and method for lowering the toxic pollutants from emissions containing molecular filter media compositions and methods of production. The filter media provides air purification by absorbing the effluents from the emission and then repurposing the contaminants through chemical interaction on the surface of the filter media and the regenerant. The adsorbent composition of the filter media maintains its integrity at high process temperature.

A carbon dioxide capture and release method of forming a MOF matrix material including at least one metal-organic-framework crystal that includes at least one metal ion or metal ion cluster coordinated to polydentate organic ligands. The method includes forming a positive moisture swing CO.sub.2 host by application of at least a portion of the MOF matrix material to at least a portion of a good, and exposing the good to a feed gas. The method also includes altering the absorption and desorption of CO.sub.2 in the CO.sub.2 host through a swing absorption/desorption process of moisture content, where an equilibrium pressure of CO.sub.2 over the CO.sub.2 host is based at least in part on the moisture content. The metal-organic-framework crystal can be UIO-66 including Zr.sub.6O.sub.4(OH).sub.4(CO.sub.2).sub.12 clusters linked by terephthalate acid ligands, and/or Zr.sub.6O.sub.4(OH).sub.4(CO.sub.2).sub.12 clusters linked by amino-terephthalic acid ligands, and/or Zr.sub.6O.sub.4(OH).sub.4(CO.sub.2).sub.12 clusters linked by nitro-terephthalic acid ligands.

A device for passive collection of atmospheric carbon dioxide is disclosed. The device includes a release chamber having an opening and a sorbent regeneration system. The device also includes a capture structure coupled to the release chamber, having at least one collapsible support and a plurality of tiles spaced along the collapsible support. Each tile has a sorbent material. The capture structure is movable between a collection configuration and a release configuration. The collection configuration includes the capture structure extending upward from the release chamber to expose the capture structure to an airflow and allow the sorbent material to capture atmospheric carbon dioxide. The release configuration includes the collapsible support being collapsed and the plurality of tiles being sufficiently enclosed inside the release chamber that the sorbent regeneration system may operate on the plurality of tiles to release captured carbon dioxide from the sorbent material and form an enriched gas.

A method for treating a synthesis gas from a gasification step. The synthesis gas is cooled to condense heavy organic impurities and water. At the end of the cooling step, light organic impurities and inorganic impurities are adsorped by at least one adsorption bed. The water and heavy tars are separated by decantation from the step of cooling the synthesis gas. At least one adsorption bed is regenerated by temperature-modulated or pressure-modulated desorption.

A carbon dioxide separation and recovery system includes an adsorption tower, a regeneration tower, and a drying tower. The adsorption tower causes a target gas to contact an adsorbent to adsorb carbon dioxide contained in the target gas to the adsorbent. The regeneration tower causes a normal-pressure wet gas which is a gas mixture of the carbon dioxide and steam to contact the adsorbent having adsorbed the carbon dioxide to desorb the carbon dioxide from the adsorbent. The drying tower dries the adsorbent. In addition, the carbon dioxide separation and recovery system includes a compressor that compresses the carbon dioxide, and an ejector that expands the carbon dioxide discharged from the compressor while suctioning negative-pressure steam, to generate the wet gas.