Abstract: An air treatment system is described, for a closable room of a vehicle, comprising: an air conditioning device provided with a fan and connectable to the room; an inlet opening for outside air, connected to the air conditioning device; a filtration device for filtering the outside air entering from the inlet opening; a recirculation port; a valve assembly provided with a shutter member, interposed between the inlet opening, the recirculation port and the air conditioning device and movable between a plurality of operating positions, in which it varies the shares of air coming from the inlet opening and the recirculation port; and a control unit to adjust the operating position of the shutter member so as to control the shares of air being drawn from the inlet opening and from the recirculation port and to maintain a predetermined value of overpressure in the room with respect to the outside.

Abstract: A combined mass airflow sensor and hydrocarbon trap is provided for absorbing evaporative hydrocarbon emissions from an air intake duct of an internal combustion engine. The combined mass airflow sensor and hydrocarbon trap comprises a duct that supports a hydrocarbon absorbing sheet in an unfolded configuration within a housing. The duct communicates an airstream from an air filter to the air intake duct during operation of the internal combustion engine. An opening in the housing receives a mass airflow sensor into the duct, such that the mass airflow sensor is disposed within the airstream. Guide vanes extending across the duct reduce air turbulence within the airstream passing by the mass airflow sensor. Ports disposed along the duct allow the evaporative hydrocarbon emissions to be drawn into the interior and arrested by the hydrocarbon absorbing sheet when the internal combustion engine is not operating.

Abstract: A refrigerator has an air sanitation device. The air sanitation device includes: a housing; an air channel located in the housing and having an air inlet and an air outlet; a fan located in the air channel, to force air to enter the air channel from the air inlet, and then be discharged out of the air channel from the air outlet; and an air detection device and/or an air purification device located between the air inlet and an inlet of the fan.

Abstract: An improved method and apparatus for removing acid gases and other impurities from raw biogas streams, such as biogas from landfills or biogas from controlled anaerobic digestion, is disclosed. The method provides efficient generation of high-purity renewable natural gas from raw biogas. The biogas is treated in a multi-stage membrane system integrated with compression equipment. The membrane separation stages are integrated with high-pressure and low-pressure compressors with the low-pressure compressor operating in a defined pressure range. The combined system provides for efficient contaminant removal from raw biogas to generate high-purity methane products with reduced membrane area and compression energy consumption.

Abstract: A honeycomb filter body comprises: a clean filter pressure drop of (P1) and a clean filtration efficiency of (FE1); a porous ceramic honeycomb body comprising a first end, a second end, and a plurality of walls having wall surfaces defining a plurality of inner channels, the porous ceramic honeycomb body comprising a base clean filter pressure drop (P0) and a base clean filtration efficiency (FE0); and a porous inorganic layer disposed on one or more of the wall surfaces of the porous ceramic honeycomb body.

Abstract: Fabrics, such as employed in air filters, facemasks, garments, or PPE, are coated with pathogen-binding agents, such as chemicals that bind to protein-encapsulated airborne pathogens. Some of these pathogen-binding agents include multifunctional chemicals that bind to the fabrics and to exposed proteins and/or glycans on the pathogens. Some of these pathogen-binding agents include multifunctional silanes. Some of these pathogen-binding agents include multifunctional phosphanes or phosphonates.

Abstract: The invention relates to a method and system for improving PSA/VPSA plant energy efficiency during times of reduced production demand and capital efficiency through optimizing feed, vacuum, and centrifugal product compressors to achieve lower energy consumption and lower unit gas product production cost. More specifically, the present invention relates to a new energy efficient PSA/VPSA turn down process and system which employs high speed direct drive centrifugal product compressor to achieve desired production. Significant lower energy consumption can be achieved by employing lower flow, and lower adsorption top pressure in the lower production range.

Abstract: A system for carbon dioxide (CO2) capture at a wellhead using a mixed matrix membranes (MMM). The MMM includes a polymer matrix and covalent triazine framework (CTF) fillers. The captured CO2 stream may be reutilized through sequestration and utilization approaches. The bulk stream may be split into multiple streams for various applications. Some CO2 may be converted chemically into fuels, reaction intermediates, and productivity enhancement tools such as methanol, syngas, CO2-foam, used in fracking fluids, and stimulant acids. The rest may be stored through direct injection into porous formations or reactive rocks such as basalt.

Abstract: In a compression process in a dynamic compressor having at least one first and one second compression stages, a first gas having a first molecular weight of less than 10 g/mol is compressed, at least one second fluid having a second molecular weight greater than 50 g/mol is mixed with the first gas to form a third gas to be compressed having a molecular weight greater than 10 g/mol, the third gas is sent to the first compression stage, the third gas is cooled in a first heat exchanger downstream of the first compression stage, where it is partially condensed, the partially condensed third gas is sent to a first phase separator to form a fourth gas having a lower molecular weight than the third gas and a first condensed liquid having a higher molecular weight than the third gas, the fourth gas is sent from the first phase separator to the second compression stage, the fourth gas compressed in the second compression stage is sent to cool in a second heat exchanger where it partially condenses, and the partially

Abstract: Provided are a gas treatment method and a gas treatment device capable of efficiently removing a bromofluoroethylene. A gas containing a bromofluoroethylene is brought into contact with an adsorbent (7) having pores with an average pore diameter of 0.4 nm or more and 4 nm or less in a temperature environment of not less than 0° C. and less than 120° C. to allow the adsorbent (7) to adsorb the bromofluoroethylene, and thus the bromofluoroethylene is separated from the gas.

Abstract: The present invention relates to a kit for concentrating low-concentration air pollutants, and to a concentration kit for concentrating low-concentration air pollutants, and then desorbing same so as to detect the components and concentrations of the pollutants. The present invention comprises: a sensor positioned on a channel in which gas moves, so as to detect pollutants in the gas; and a concentration part, which comprises an adsorbent for adsorbing and desorbing the pollutants in the gas moving to the sensor, so as to transfer concentrated pollutants to the sensor.

Abstract: A system and method for the collection of carbon dioxide is disclosed. The system includes a liquid sorbent that is a carbon dioxide sorbent, and a plurality of conduits. Each conduit has a hollow interior enclosed by a conduit wall. The conduit wall includes a membrane material that is both hydrophobic, trapping the liquid sorbent inside the hollow interior, and porous, allowing gaseous carbon dioxide to transfer from outside the conduit, through the conduit wall, and into the liquid sorbent. The system also includes a first manifold and a second manifold in fluid communication with the first manifold through the plurality of conduits and a riser. The liquid sorbent flows in a circuit, from the first manifold to the second manifold through the plurality of conduits, and from the second manifold to the first manifold through the riser.

Abstract: A gas exchange system, said system comprising: a plurality of cartridges, each having a casing, said casing having a cartridge inlet adjacent to a first end and a cartridge outlet adjacent to an opposed second end; each casing having a bore in which is placed a gas permeable, liquid impermeable, hollow membrane; each hollow membrane having a membrane inlet arranged to receive a gas from an inlet chamber and a membrane outlet for venting said gas; each cartridge inlet in communication with a concentration zone, and arranged to receive a solvent from said concentration zone, so as to exit said solvent through said cartridge outlet; wherein said bore is arranged to flow said solvent adjacent to said hollow membrane so as to permit the exchange of gas through said gas permeable, liquid impermeable membrane.

Abstract: A dehumidifying air handling unit for an HVACR system includes a housing, a desiccant wheel, and a cooling heat exchanger. A main airflow path extending through the housing from an air inlet to and air discharged outlet of the housing. The desiccant wheel includes a first end and a second end that are each disposed in the main airflow path and a metal organic framework desiccant that is moved between the first end and the second end. A desiccant wheel includes a metal organic framework desiccant disposed on a surface of the desiccant wheel. Rotation of the desiccant wheel moves a position of the surface between a first end and a second end of the desiccant wheel. The metal organic framework desiccant has an majority absorption-desorption operating band of 25% relative humidity or less.

Abstract: In variants, an air treatment module can include a sorption module defining a sorption cavity, an air intake channel, an air exhaust channel, and a target substance exhaust channel. The air treatment module can include a sorbent encapsulated within a sorbent structure (e.g., microencapsulated carbon sorbent) which can sorb carbon dioxide from air passing through the sorption cavity. The air treatment module can desorb carbon dioxide from the air and store the carbon dioxide in long term storage.

Abstract: The invention relates to a method for the desulfurization of methane-containing gases by bamboo-based activated carbon. The method according to the invention is particularly suitable for the desulfurization of methane-containing gases such as biogas, landfill gas, mine gas, flue gas, marsh gas or natural gas with a view to further use of the gas or the sulfur extracted.

Abstract: The present disclosure relates to multi-layer composite articles including at least two nonwoven web layers. Each or the layers may be a spunbonded web, and each may include biodegradable materials. The multi-layered composites of the present disclosure are particularly well suited for air filtration, as they can combine a high dust holding capacity with sufficient strength, dimensional stability, and a relatively low pressure drop.

Abstract: Method and apparatus for condensing a majority of the solvent in a process gas stream at low temperatures, e.g., below the freezing point of water, ca. ?5° C. The gas stream exiting the condenser step may be further processed in one or more emission control devices, such as a single or multi-step series of concentrator devices, such as zeolite concentrator devices. One or more emission control operations can be carried out downstream of the single or multi-step concentrators. The aforementioned condensing process enables the one or more concentrators to operate in a favorable temperature range for removal of 99% or more of VOC, thereby meeting or exceeding strict environmental regulations.

Abstract: An oxygen concentrator includes one or more adsorbent sieve beds operable to remove nitrogen from air to produce concentrated oxygen gas at respective outlets thereof, a product tank fluidly coupled to the respective outlets of the sieve bed(s), a compressor operable to pressurize ambient air, one or more sieve bed flow paths from the compressor to respective inlets of the sieve bed(s), a bypass flow path from the compressor to the product tank that bypasses the sieve bed(s), and a valve unit operable to selectively allow flow of pressurized ambient air from the compressor along the one or more sieve bed flow paths and along the bypass flow path in response to a control signal. The valve unit may be controlled in response to a command issued by a ventilator based on a calculated or estimated total flow of gas and entrained air or % FiO2 of a patient.

Abstract: A nuclear power plant includes a nuclear reactor and a reactor coolant circuit containing a reactor coolant. The nuclear power plant further includes a degasification system (2) for the reactor coolant. The degasification system (2) is an ultrasonic degasification system comprising a sonotrode cluster (11) with at least one sonotrode (10) arranged in a line of the reactor coolant circuit or in a line which is fluidically connected to the reactor coolant circuit.