摘要:
A membrane-based air separation module includes an inlet configured to receive supply air, a first hollow fiber membrane configured to substantially remove water from the supply air to form an anhydrous air stream, and a permeate port configured to exhaust the water removed by the first hollow fiber membrane from the air separation module. The air separation module also includes a second hollow fiber membrane positioned downstream of the first hollow fiber membrane configured to receive the anhydrous air stream and substantially remove oxygen from the anhydrous air stream, an oxygen-enriched air outlet configured to exhaust the oxygen removed by the second hollow fiber membrane from the air separation module, and a nitrogen-enriched air outlet configured to supply a stream of nitrogen-enriched air to a fuel tank of an aircraft.
摘要:
A membrane permeation system and process accommodates varying acid gas inlet concentrations over time while utilizing only the initially installed equipment and still maintaining the non-permeate gas specification. The system and process provide flexibility to operate efficiently over a wide range of inlet CO2 concentrations by adjustments to primary permeate, secondary permeate, and recycle gas operations. The glassy polymer membrane devices used in the system and process are selected so removal duty efficiency increases as acid gas concentration increase. Designing the system and process to handle about a 15% increase in acid gas concentrations over initial conditions effectively treats acid gas concentrations well above that 15% increase, thereby eliminating the need for additional equipment or for additional downstream amines and physical solvents.
摘要:
A module for separating nitrogen from air via hollow-fibre membranes, includes a deflector (8) that communicates with the inlet hole (3) for the pressurized air and is arranged for deflecting the flow of compressed air into the module along paths of flow (9) having a direction that is not directly incident on the first end of the bundle of fibres (1).
摘要:
This disclosure relates generally to vehicles with reduced emissions. More particularly, this disclosure relates to systems, methods, and apparatuses related to vehicles with reduced carbon dioxide emissions. The carbon dioxide emissions may be stored in a carbon dioxide clathrate.
摘要:
A hollow fiber module of a device for separating fluids has hollow fibers with walls that have partially permeable structures. The hollow fibers are positioned parallel to each other. At least one areal fluid-permeable spacer medium with a structure that is self-supporting an areal state of the at least one spacer medium is provided and arranged between the hollow fibers such that the at least one spacer medium surrounds at least partially circumferentially a first one of two neighboring hollow fibers at least on a side of the first hollow fiber that is facing the second one of the two neighboring hollow fibers.
摘要:
A device is disclosed for separating nitrogen and oxygen. The device includes an inlet in fluid communication with a source of a gas comprising oxygen and nitrogen, a membrane having a greater permeability to oxygen than to nitrogen. One side of the membrane is in fluid communication with the inlet, and the other side of the membrane is in fluid communication with an outlet for nitrogen-enriched gas. An outlet for oxygen-enriched gas is also in fluid communication with the first side of the membrane. A porous metal foam is disposed between the inlet and the membrane.
摘要:
This invention relates to aromatic block copolyimide polymers comprising both hydroxyl functional groups and carboxylic acid functional groups, their membranes and methods for making and using these polymers and membranes. The aromatic block copolyimide polymer described in the present invention comprises both hydroxyl functional groups and carboxylic acid functional groups. The gas transport properties particularly the selectivities of the aromatic block copolyimide comprising both hydroxyl functional groups and carboxylic acid functional groups were significantly improved compared to those of the aromatic random copolyimide comprising both hydroxyl functional groups and carboxylic acid functional groups.
摘要:
The present invention relates to a nitrogen adsorbent having nitrogen selective adsorptivity by including an organic-inorganic hybrid nanoporous material having a coordinatively unsaturated metal site with density of 0.2 mmol/g to 10 mmol/g in a skeleton, surface or pore; and use thereof, such as a device separating nitrogen from a gas mixture containing nitrogen and methane, a pressure swing adsorption separation device and a temperature swing adsorption separation device for separating nitrogen provided, a method for separating nitrogen and methane from a gas mixture containing nitrogen and methane, a device for separating nitrogen, oxygen or argon, a method for separating nitrogen, oxygen or argon from a gas mixture containing nitrogen, oxygen or argon, and a method for preparing nitrogen or high purity inert gas all separated from a gas mixture containing nitrogen and inert gas.
摘要:
A gas separation module includes at least one inlet port, a plurality of outlet ports, and a plurality of hollow fiber membranes. Individual fibers have a feed end and a product end with a retentate interior side and a permeate exterior side. The module includes a feed tubesheet within the shell segregating the at least one inlet port and the permeate side of the fibers. The feed tubesheet includes a matrix and at least one segment joint. The segment joint separates segments of the feed tubesheet from one another. A formation method includes positioning a hollow fiber membrane material in association with at least one tubesheet segment joint and applying a matrix. The method includes forming a feed tubesheet from cured matrix and the segment joint and forming a plurality of hollow fiber membranes from the fiber material. The segment joint separates segments of the feed tubesheet from one another.
摘要:
An air drying system for OBOGS is provided. The system comprises a bypass valve having an opened state and a closed state. The bypass valve is in fluid communication with an air inlet providing pressurized air. A dryer unit is configured to produce dried air when the bypass valve is in the closed state. An OBOGS unit produces oxygen enriched air while a purge valve has an opened state and a closed state. When the bypass valve is its closed state, the purge valve is in its opened state thereby directing a portion of the dried air to the oxygen generating system unit and a portion of the dried air to the dryer unit. When the bypass valve is its open state the pressurized air passes directly to the OBOGS unit.