A spacer for a body of a refrigerant tank—such as a modulator—in an automotive HVAC device is provided. In embodiments, the spacer is flexible to enable it to be inserted into the modulator, and expanded out against the walls of the modulator when released therein. The spacer inhibits a desiccant bag from contacting the inner wall of the modulator, namely the location where a hole (e.g., for an inlet or outlet) is provided. The spacer can be a cage that surrounds a lower portion of the desiccant bag. And end of the desiccant bag can wrap around a flange of the cage, and be attached to the flange by mechanical fastening (e.g., through a slot), or by welding, or other means.

A portable gas separator assembly utilizing carbon molecular sieve absorbents or elements to separate a compressed air stream to extract nitrogen and oxygen molecules. Components of the assembly include at least two charging towers so that one tower can be charged with compressed gas while the other of the at least two towers is purged.

An evaporated fuel processing device is installed to a vehicle having an internal combustion engine and a fuel tank and is configured to process evaporated fuel generated through evaporation of fuel in the fuel tank. A control device of the evaporated fuel processing device is configured to adjust an opening degree of a sealing valve based on a pressure of vapor-phase gas sensed with a pressure sensor and a concentration of evaporated fuel in the vapor-phase gas sensed with a concentration sensor and thereby adjust a supply amount of the evaporated fuel supplied to an air intake pipe at a time of executing a purge operation, in which the vapor-phase gas is purged from the fuel tank to the air intake pipe of the internal combustion engine.

Embodiments of the invention include a filtration element. In an embodiment, the invention includes a filtration element for an airplane cabin that includes a first media portion upstream from a second media portion. The first media portion can include activated carbon. The second media portion can include a catalyst material. Other embodiments are also included herein.

A fuel tank system for a vehicle includes a fuel tank, a fuel supply passage, a canister, an evaporated fuel gas supply passage, a communication passage, a backflow prevention device, first and second pressure measurement devices, and a control device. The fuel tank stores fuel supplied by the fuel supply passage. The canister adsorbs evaporated fuel gas generated in the fuel tank and supplied through the evaporated fuel gas supply passage. The backflow prevention device is provided in a pipe line of the fuel supply passage, and prevents a backflow of the fuel from the fuel tank. The first and second pressure measurement devices respectively measure pressures in the fuel supply passage and the evaporated fuel gas supply passage. The control device diagnoses the communication passage as being blocked when a difference between pressure values measured by the first and second pressure measurement devices exceeds a predetermined value.

Lightweight, portable oxygen concentrators that operate using an ultra rapid, sub one second, adsorption cycle based on advanced molecular sieve materials are disclosed. The amount of sieve material utilized is a fraction of that used in conventional portable devices. This dramatically reduces the volume, weight, and cost of the device. Innovations in valve configuration, moisture control, case and battery design, and replaceable sieve module are described. Patients with breathing disorders and others requiring medical oxygen are provided with a long lasting, low cost alternative to existing portable oxygen supply devices.

An air pollution remediation system is provided. The systemic apparatus includes a tubular column having a plurality of spaced apart vents along its outer surface. Each vent has adjustable louvers for controlling the airflow therethrough. An airflow conduit extends along the longitudinal length of the column with porous layers and a mass of absorbent disposed between the airflow conduit and the plurality of vents. A fan fluidly coupled to the airflow conduit urges ambient air into the airflow conduit and through the porous layers and the mass of absorbent and out of the vents in a selectively controlled manner by way of the adjustable louvers. A prefilter may be disposed upstream of the fan. A network of the systemic apparatus can be arranged to provide, in a selective enabled manner through the adjustable louvers, a contiguous looping canopy of purified air over large open spaces.

A system and method of pre-purification of a feed gas stream is provided that is particularly suitable for pre-purification of a feed air stream in cryogenic air separation unit. The disclosed pre-purification systems and methods are configured to remove substantially all of the hydrogen, carbon monoxide, water, and carbon dioxide impurities from a feed air stream and is particularly suitable for use in a high purity or ultra-high purity nitrogen plant. The pre-purification systems and methods preferably employ two or more separate layers of hopcalite catalyst with the successive layers of the hopcalite separated by a zeolite adsorbent layer that removes water and carbon dioxide produced in the hopcalite layers. Alternatively, the pre-purification systems and methods employ a hopcalite catalyst layer and a noble metal catalyst layer separated by a zeolite adsorbent layer that removes water and carbon dioxide produced in the hopcalite layer.

Separation unit (1) for separating at least one gaseous component from a gas mixture, or arrangement of such separation units, wherein it comprises at least one circumferential wall element(s) (5), said circumferential wall element(s) defining an upstream opening (31) and an opposed downstream opening (32) of at least one cavity (3) containing at least one gas adsorption structure (4) for adsorbing said gaseous component under ambient pressure and/or temperature conditions, or an array of at least two such cavities (3), wherein the separation unit (1) comprises a pair of opposing sliding doors (12) for sealing the openings of a cavity (3) and preferably allowing for evacuating a cavity (3), and wherein the pair of opposing sliding doors (12) can be shifted in a direction essentially parallel to the plane of the respective sliding door (12) and to allow for flow through of gas mixture through the gas adsorption structure (4).

In some examples, an air treatment system includes a filter, an ozone sensor, and a separator configured to separate air into a nitrogen-enriched gas and an oxygen-enriched gas. The filter is configured to remove ozone from an air stream and supply filtered air to the separator. The ozone sensor is configured to sense an ozone level of the filtered air issuing from the filter prior to encountering the separator. The air treatment system may include processing circuitry configured to monitor the ozone level sensed. The air treatment system may be part of an inerting system configured to supply the nitrogen-enriched gas to an ullage space of a fuel tank.