A fluid system includes an inlet conduit disposed in a fluid flow path between a fluid source and a fluid destination. The fluid conduit includes a fluid mixing portion. The fluid system includes a fluid separation module disposed in the flow path downstream of the constriction between the source and the destination. The fluid separation module includes a first fluid separator, The fluid system includes a second fluid separator disposed in the flow path upstream of the first fluid separator, The fluid system includes a feedback conduit that may provide fluid communication between an outlet of the fluid separation module and the fluid mixing portion.

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.

A system for calculating maintenance predictions and making improvements to performance deficiencies to one or more components in an on-board inert gas generating system (OBIGGS) is described. The OBIGGS components include an ozone converter, heat exchanger, inlet filter, and Air Separation Module (ASM). The system comprises a prognostic health monitoring (PHM) sensor network comprising at least one respective sensor coupled to each of the components of the OBIGGS. Each at least one respective sensor is configured to output a respective data signal corresponding to a performance condition of a respective component. A control unit is operatively coupled to each component and signally coupled to each respective sensor of the PHM sensor network. The control unit includes at least one test condition algorithm configured to analyze the respective data signal to calculate the maintenance prediction for the respective component.

Methods and systems for removing moisture from a refrigerant can utilize a desiccant-based system. The methods and systems can be employed in conjunction with a liquid natural gas (LNG) refrigeration circuit in either an online mode or an offline mode. For example, a system for removing moisture from a refrigerant can include: a refrigerant source; a moisture removal unit containing desiccant; and a refrigeration circuit comprising a refrigerant compressor, a refrigerant condenser, and a heat exchanger that are fluidly connected in a loop, wherein the refrigerant source is fluidly coupled to the moisture removal unit to supply a refrigerant from the refrigerant source to the moisture removal unit, and the moisture removal unit is fluidly coupled to the refrigeration circuit to supply the refrigerant from the moisture removal unit to the refrigeration circuit.

A system and method for storing nitrogen-enriched air (NEA) comprising an air separation device (ASM) and producing NEA in the ASM. One example implementation may include bleed air being supplied to a pressure intensifier. The pressure intensifier is powered by NEA compressed by a first compressor, and the pressure of the bleed air is increased by the pressure intensifier and supplied to an ASM. In another example implementation, a turbine may be drivingly connected to a second compressor and the bleed air supplied to the second compressor. The NEA compressed by the first compressor is supplied to and drives the turbine, which drives the second compressor, and the air compressed by the second compressor is supplied to the ASM. In another example implementation, a turbine may drive an electric generator, which in turn may power an electric motor that drives the second compressor.

The process of the present invention provides high recovery and low capital cost giving it an economic advantage over previously known purification processes. The present process has particular applicability to the purification of synthesis gases comprising at least hydrogen (H.sub.2), carbon monoxide (CO), methane (CH.sub.4), CO.sub.2, and H.sub.2O to obtain a gas stream including at least H.sub.2, CO, and CH.sub.4, that is substantially free of H.sub.2O and CO.sub.2. The process also has applicability to the purification of natural gases inclusive of at least CH.sub.4, N.sub.2, CO.sub.2, and H.sub.2O to produce a gas stream including at least CH.sub.4 and N.sub.2, but which is substantially free of H.sub.2O and CO.sub.2.

A generator of inert gas from an airflow, in an inerting system for at least one aircraft fuel tank is disclosed. The generator includes a system with an air inlet and means for distributing the airflow to a plurality of air separation modules arranged in parallel on the air system to deplete oxygen in the air and generate a nitrogen-enriched inert gas at the outlet. The generator also includes a programed control unit for the distribution means to selectively supply air to a single, a portion or all of the air separation modules, depending on the flight phase of the aircraft.

An adsorbent having a composition comprising at least 90% chabazite where the chabazite is a single phase chabazite having an Si/Al ratio of 1.2 to 1.8, the chabazite includes a mixture of at least two types of cations, and each of the at least two types of cations are in a molar ratio relative to Al of at least 0.05.

The present invention provides a composition for a CO.sub.2 gas separation membrane containing: at least one compound selected from the group consisting of an alkali metal carbonate, an alkali metal bicarbonate, and an alkali metal hydroxide; a crosslinked polymer in which a polymer having a carboxyl group has been crosslinked; and a non-crosslinked polymer obtained by polymerization of one or more monomers selected from the group consisting of vinyl acetate, acrylic acid, methacrylic acid, and a derivative thereof.

Membranes, methods of making the membranes, and methods of using the membranes are described herein. The membrane can comprise a support layer; and a selective polymer layer disposed (e.g., coated) on the support layer. The selective polymer layer can comprise a polymer matrix (e.g., a hydrophilic polymer, an amine-containing polymer, or a combination thereof), and a guanidine-based mobile carrier dispersed within the polymer matrix. Optionally, the selective polymer later can further include an amine-based mobile carrier, a CO.sub.2-philic ether, a graphene oxide, carbon nanotubes, or a combination thereof, dispersed within the polymer matrix. The membranes can be used to separate carbon dioxide from other gases, such as hydrogen and/or nitrogen. Also provided are methods of separating gas streams using the membranes described herein.