The present invention provides a porous coordination polymer, wherein the porous coordination polymer is formed of unit lattices; each of the unit lattices has a shape of a cube having eight vertexes and twelve sides; each of the vertexes of the unit lattices consists of a Zn.sub.4O cluster; each of the sides of the unit lattices consists of a .sup.−OOC—C≡C—COO.sup.− group. At least a part of the unit lattices contains at least one hydrogen molecule only, or the inside of at least a part of the unit lattices is empty. The present invention provides a novel porous coordination polymer, especially, a porous coordination polymer suitable for separating hydrogen molecules from a gaseous mixture of the hydrogen molecules and impurity molecules (e.g., nitrogen molecules, oxygen molecules, or carbon dioxide molecules).

A system and method to supply nitrogen gas is provided. Ambient air is compressed and stored in a storage receiver and then nitrogen is separated from the compressed air in a nitrogen membrane separation unit. The separated nitrogen is stored in a nitrogen storage tank under pressure and released through a pressure control valve. The system is confined to a small footprint and is useful as a nitrogen source where conventional compressed nitrogen tanks are a safety or space issue. Systems to prepare nitrogen infused beverages are also provided.

An air composition adjusting device includes: an oxygen separator that separates oxygen from external air to be supplied to a target space; a gas supply path including a high concentration gas supply path for oxygen through which the oxygen separator communicates with the target space; and a controller that performs an oxygen concentration raising operation of supplying a high oxygen concentration gas, which has a higher oxygen concentration than external air before being treated by the oxygen separator, to the target space through the high concentration gas supply path for oxygen.

A method and apparatus for removing water from compressed air is disclosed. The method includes the steps of passing a stream of compressed air through a pressure swing adsorption (PSA) dryer. The dryer includes at least one vessel containing a desiccant material bound into pieces, for example tubes, using a polymer binder. The PSA dryer also has a control system for controlling the flow of the compressed air and switching between drying and purging modes. In particular the vessel and desiccant material contained therein are sized to produce a dew point suppression of less than 50° C.

An ambient humidity control article for controlling the ambient humidity within 45%-55%. The article includes a substrate having a predetermined water absorbability, and a humidity control layer coated on the substrate. The amount of the composition coated on per cubic centimeter of the substrate is 0.54-0.74 grams. The composition includes at least one organic acid salt, at least one polyol and water. The count of carbon in the polyols is not greater than 5. The weight percentage of the organic acid salt and the polyols in the composition is 30.6%-58.8% and 9.3%-26.7%, respectively. The water absorption amount of the substrate is not less than 0.5 grams per cubic centimeter. The article can control the ambient humidity without the need to pre-adjust the objective space. The article has a large capacity of moisture absorption and desorption, and can quickly achieve the desired humidity.

Entrained metal hydride particle are removed from a flow of hydrogen from a Mg-based hydride storage unit using not only a particle filter but improvements for reducing or eliminating drastic changes in flow. In addition to or alternative to removal of entrained metal hydride particles, methane produced by reaction of hydrogen with steel in a metal hydride system preferably operated above 350° C. is removed downstream of the Mg-based hydride storage unit using an adsorption cartridge, preferably containing activated carbon.

A scent device comprises a container defining a volume and configured to hold a fill material, which may include one or more chemical compounds, natural formulations, or both configured to absorb odor and/or moisture, and/or emit a scent. The scent device includes a vented cap reversibly coupled to the container via a connection mechanism, and a breathable insert sandwiched between the container and the cap. The breathable insert may comprise a non-woven fabric supported along its perimeter by a structural mount. Methods of manufacturing the scent device involve cutting a mount from a support material, attaching a breathable material to the mount to form a breathable insert, depositing a scent-controlling material within a container, and sandwiching the breathable insert between the container and a cap upon coupling the cap with the container.

An apparatus comprising an inert gas generator having an outlet and an inlet, and a secure enclosure having an outlet and an inlet. The outlet of the secure enclosure is connected to the inlet of the inert gas generator and the secure enclosure supplies inert gas enriched air having a first oxygen content percentage from the outlet of the secure enclosure to the inlet of the inert gas generator. The inert gas generator is configured to operate on the inert gas enriched air having a first oxygen content percentage to form inert gas enriched air having a second oxygen content percentage, wherein the second oxygen content percentage is substantially lower than the first oxygen content percentage. The inert gas generator may be a membrane inert gas generator. The inert gas generator may be a pressure swing adsorption inert gas generator. The inert gas may be nitrogen.

A volatile liquid vapor recovery system is used to recover vapors produced in the loading of shipping vehicles with volatile liquid product from a storage tank. The recovery system uses a primary vessel with an adsorption bed for adsorbing the volatile liquid vapors and venting clean air including oxygen to the atmosphere. The recovery system regenerates the adsorption bed by recovering the volatile liquid vapors from the adsorption bed and directly delivering said vapors to the storage tank. The system may be adapted to remove oxygen from the primary vessel prior to regeneration, such as by purging and venting the primary vessel with a purge gas or by providing a secondary vessel to receive oxygen and vapors from the primary vessel prior to regeneration of the first adsorption bed. Adsorbed volatile liquid vapor from the secondary vessel can be recycled to the primary vessel for conservation.

An Electrochemical Nitrogen Generator System and Method. The system and method provide the ability to create a nitrogen-rich environment in containers of a variety of sizes. The system and method are able to extract the oxygen from the air within the container without reducing the internal pressure substantially below atmospheric. A version of the method is provided to reduce the oxygen content and replace it with nitrogen through a series of sequential fractional steps. In another form, the system and method will provide a “streaming” approach of bleeding off oxygen-containing contents of the container, while continuously replacing it with air until such time as the percentage of oxygen within the container is below the desired level. In yet another version, the system and method operate under pressure, thereby injecting pressurized air, either in sequential fractional steps or via continuous flow, whereby at the end of the process, the internal contents of the container are in a pressurized nitrogen environment, and the oxygen expelled from the container during the process is also under pressure.