Abstract: The invention relates to a chip extraction system for the continuous disposal of chips, comprising a chip extracting tube (9), which opens out into a vacuum chamber (2) with a base on which chips (12) that are sucked in collect, a chip discharging tube (17), which has an inlet (16) arranged on the base and an outlet (18) arranged outside the vacuum chamber (2), wherein an inner cross-sectional area of the chip discharging tube (17) increases between the inlet (16) and the outlet (18), and at least one chip forcing device (14, 19), which is arranged at the inlet (16) and forces the chips (12) that have collected on the base into the inlet (16).

Abstract: A wearable electronic device may alert a wearer as to a presence of either a range of allergens or to specific pollen to which the individual is allergic. As such, the device may warn the user of bioparticles likely to affect them allergenically. The device may include an airflow path. A deterministic lateral displacement (DLD) array may be positioned within the airflow path to capture bioparticles of a particular size. An imaging device may capture images of captured bioparticles. The system may include a database of bioparticles in a range of sizes. The system may be configured to compare the captured bioparticles to the information in the database. A wearer may be alerted if bioparticles potentially allergenically problematic to the person have been found in the captured bioparticles.

Abstract: The present invention is a wet scrubber having a forced mixing chamber on top of an immersed packed bed, significantly increasing the scrubbing efficiency of acid gases and other pollutants by maximizing gas to liquid contact. A mixing fan located outside of the wet scrubber being connected to a mixing zone through an inlet duct to receive fluid from the mixing zone and an exhaust duct to blow fluid back into the mixing zone, thereby enhancing the mixing process inside the mixing zone.

Abstract: A method of mass transfer includes the steps of: supplying a first fluid and a second fluid into a mass transfer apparatus, wherein the mass transfer apparatus includes a vessel which has a head region, a base region and a mass transfer region, wherein the first fluid is brought into contact with the second fluid at least in the mass transfer region, wherein the mass transfer region is arranged between the head region and the base region and the mass transfer region includes a structured packing which includes a plurality of neighboring layers of fabric which includes fiber strands of a non-metallic material. The mass transfer apparatus is operated at a fluid load of at most 3 m3/m2/h. The fabric of the structured packing includes fiber strands of a non-metallic material which are formed as weft threads, wherein the weft threads have a yarn count of at least 100 g/1000 m and the weft threads include at least 20 yarns/25.4 mm.

Abstract: A method of mass transfer includes the steps of: supplying a first fluid and a second fluid into a mass transfer apparatus, wherein the mass transfer apparatus includes a vessel which has a head region, a base region and a mass transfer region, wherein the first fluid is brought into contact with the second fluid at least in the mass transfer region, wherein the mass transfer region is arranged between the head region and the base region and the mass transfer region includes a structured packing which includes a plurality of neighboring layers of fabric which includes fiber strands of a non-metallic material. The mass transfer apparatus is operated at a fluid load of at most 3 m3/m2/h.

Abstract: A range hood for a kitchen range or other similar appliance is disclosed. The range hood is adapted to be coupled to a blower to draw the contaminated effluent stream from the range into the hood. The effluent stream is drawn through a substantially horizontal perforated liquid support or impingement tray that is filled with a working liquid, and is then passed through a high-efficiency mist eliminator. The range hood offers a substantially straight airflow path from a point just inside the inlet to the outlet. The range hood also has a low profile, and offers direct access to its interior components for easy inspection and cleaning.

Abstract: Methods are disclosed for the selective absorption of gas components based on differences in their gas phase and liquid phase resistances to mass transfer. The methods advantageously utilize a gas-liquid contacting apparatus having contacting stages with co-current flow channels that can provide contacting with increased liquid phase resistance to mass transfer, for example in the spray regime such that the liquid is effectively dispersed as small droplets into the gas phase.

Abstract: Techniques for reducing a carbon emissions intensity of a fuel includes injecting a carbon dioxide fluid into a first wellbore; producing a hydrocarbon fluid from a second wellbore to a terranean surface; and producing a fuel from the produced hydrocarbon fluid, the fuel including a low-carbon fuel and assigned an emissions credit based on a source of the carbon dioxide fluid.

Abstract: A filtration system and method for the remediation of hydrazine from contaminated gas is disclosed. The system is provided in the form of a container with an net port and an outlet port containing absorbent pads or filters or wipes saturated with a solution of a dicarbonyl compound. As contaminated gas passes through the container, hydrazine present within the gas reacts with the dicarbonyl compound and becomes neutralized, thereby resulting in the exit of pure gas that no longer contains hydrazine from the container. The system can remediate hydrazine from ammonia borane to efficiently regenerate spent said ammonia borane from polyborazylene as a hydrogen storage material. The absorbent pads can also be used independently to remove hydrazine liquid spill.

Abstract: The present invention relates to an apparatus for removing air contaminants, which adsorbs dust and harmful substances contained in the air contaminants using an absorbing unit connected to an inlet pipe inserted in a tank.

Abstract: Methods and apparatuses are described for contacting an oxidizing solution such as an aqueous hydrogen peroxide composition of hydrogen peroxide and at least one additive that catalyzes the decomposition of the hydrogen peroxide into hydroxyl radicals with an atmospheric effluent containing odorous and/or noxious components. These components are absorbed by the aqueous hydrogen peroxide composition to produce an atmospheric effluent having reduced amounts of the odorous and/or noxious components. Various methods are described for adding the hydrogen peroxide and the decomposition additive.

Abstract: A CO2 recovering apparatus includes a CO2 absorber that brings flue gas containing CO2 and O2 into contact with CO2 absorbing liquid to reduce CO2 in the flue gas; and a regenerator that reduces CO2 in CO2 absorbing liquid (rich solvent) that absorbed CO2 in the CO2 absorber to regenerate the CO2 absorbing liquid, so that the regenerated CO2 absorbing liquid (lean solvent) having CO2 reduced in the regenerator is reused in the CO2 absorber. A lower liquid reservoir is located at the bottom of the CO2 absorber, and an air-bubble gathering member is arranged therein to gather air bubbles included in the absorbing liquid.

Abstract: A system for saturating a liquid with a gas includes a first screen box, a particulate material provided in the first screen box, a liquid inlet disposed in fluid communication with the first screen box, a second screen box disposed in fluid communication with the first screen box, a gas inlet disposed in fluid communication with the second screen box; and an outlet conduit disposed in fluid communication with the second screen box.

Abstract: An evaporative cooler for cooling air includes a cooling housing having an air inlet and an air outlet and an evaporation media, located within the cooling housing intermediate the air inlet and the air outlet for air flow there through and for receiving water to permit evaporation of at least some water. The evaporative cooler includes a drain pan located within the cooling housing and below the evaporation media to catch water which has not evaporated and falling from the evaporation media and a sump located within the cooling housing and below the drain pan for collecting water for use in supplying water to the evaporation media. The evaporative cooler includes a pipe connecting the drain pan to the sump for water movement from the drain pan to the sump and an air vent located within the cooling housing and connected to the pipe, the air vent being open to air within the cooling housing and above the drain pan to permit release of air from within the pipe.

Abstract: An air filtration system and method for the remediation of hydrazine from contaminated air. The system is provided in the form of a container with an inlet port and an outlet port containing absorbent pads or filters or wipes saturated with a solution of a dicarbonyl compound. As contaminated air passes through the container, hydrazine present within the air reacts with the dicarbonyl compound and becomes neutralized, thereby resulting in the exit of pure air from the container. The absorbent pads can also be used independently to remove hydrazine liquid spill.

Abstract: Improved contacting stages for carrying out vapor-liquid contacting are described. Particular aspects are directed to co-current vapor-liquid contacting devices with non-parallel contacting stages that provide an efficient usage of column space for fluid flow and contacting, in order to achieve high capacity, high efficiency, and low pressure drop. The fabrication of such contacting stages is improved using one or more structural enhancements, preferably a combination of enhancements, to achieve easy installation and significantly improved rigidity between the various parts and thereby avoid movement/separation of these parts. This reduces the possibility of fluid leakage across, and consequently vapor and/or liquid bypassing of, the contacting stage.

Abstract: A range hood for a kitchen range or other similar appliance is disclosed. The range hood is adapted to be coupled to a blower to draw the contaminated effluent stream from the range into the hood. The effluent stream is drawn through a substantially horizontal perforated liquid support or impingement tray that is filled with a working liquid, and is then passed through a high-efficiency mist eliminator. The range hood offers a substantially straight airflow path from a point just inside the inlet to the outlet. The range hood also has a low profile, and offers direct access to its interior components for easy inspection and cleaning.

Abstract: A device useful for separating gaseous pollutants, such as sulphur dioxide, from a gas by means of an absorption liquid is disclosed. The device includes a horizontal apertured plate mounted between an inlet and an outlet arranged for passage of a gas containing a gaseous pollutant therethrough. On an upper surface of the horizontal apertured plate is a flowing layer of absorption liquid. The separation of the gaseous pollutant from the gas is adjustable by varying the thickness of the flowing layer of absorption liquid by moving a throttle means to a position that provides the desired amount of resistance to the following layer of absorption liquid.

Abstract: De-entrainment devices for effectively removing entrained liquid from a vapor stream are disclosed. These de-entrainment devices are effective in distillation columns and other apparatuses comprising vapor-liquid contacting devices. Particular representative applications for these de-entrainment devices are in distillation (or fractionation) columns having co-current contacting modules, in which liquid and vapor enter into co-current flow channels of the modules. The de-entrainment devices can be used, for example, with non-parallel contacting stages or other types of high capacity trays.

Abstract: Disclosed is a gas-liquid contact system. The system includes a vessel arranged approximately perpendicular to the ground in a longitudinal direction, a static fluid mixer in the vessel having a passage tube and a spiral blade provided in the passage tube, a gas supplier supplying gas having foreign substances to the static fluid mixer from a lower end of the vessel, a gas discharger discharging the gas passed through the static fluid mixer from an upper end of the vessel, a first liquid supplier supplying liquid to the static fluid mixer, and a liquid discharger discharging the liquid supplied from the first liquid supplier outside of the vessel. In the system, the gas supplier includes a gas generator generating gas, a pipe connecting the gas generator with the vessel, a blowing device provided in the pipe, and a second liquid supplier supplying liquid to the pipe between the gas generator and the blowing device.

Abstract: In an air filtering apparatus for generating electrolytic water, infiltrating the electrolytic water into a gas-liquid contact member, and blowing air to the gas-liquid contact member by an air blowing fan, thereby filtering air, including a drain pipe for discharging the electrolytic water and a drain tank for receiving and stocking the electrolytic water discharged from the drain pipe which are mounted in a housing, the drain tank has a vertical tank body and disposed so as to be taken in and out through the front surface of the housing.

Abstract: An air filtering apparatus including a housing having an air suction port through which air is sucked and an air blow-out port through which air is blown out, an air blower for forming in the housing an air flowing passage through which the air sucked from the air suction port flows to the air blow-out port, an air filtering unit that is disposed on the air flowing passage and brings the air supplied along the air flowing passage into contact with electrolytic water containing active oxygen species to filter the air, an electrolytic water supply unit for electrolyzing prescribed water to generate the electrolytic water and supplying the electrolytic water to the air filtering unit, and a water supply unit having a water stock unit for stocking the prescribed water supplied through a water distributing pipe from an external water supply source, the water stocked in the water stock unit being supplied to the electrolytic water supply unit, wherein the air filtered by the air filtering unit is blown out from the

Abstract: A method and apparatus are provided for improving the efficiency of an aqueous froth filter. An array of saturated mesh assemblies interacts with an incoming contaminated air stream. As the air stream flows through the saturated mesh assemblies, an aqueous froth is generated immediately downstream of each mesh assembly. As the bubbles of the froth move downstream towards the next saturated mesh assembly, the velocity of the air stream causes at least some of the bubbles to burst. The bursting bubbles rupture into hundreds or thousands of micro-droplets. The micro-droplets are used together with the aqueous froth to coalesce with or otherwise bind with contaminants in the air stream. An optional feature is that massive particles greater than three microns in diameter are removed by inertial impaction, whereby those heavy particles collide with the walls of serpentine shaped vanes of a mist eliminator. The method and apparatus are capable of filtering chemical and biological warfare agents out of an air stream.

Abstract: An air filtering apparatus including a housing having an air suction port and air blow-out port, an electrolytic bath for generating electrolytic water, a gas-liquid contact member disposed in the housing, an electrolytic water supply unit for supplying the electrolytic water to the gas-liquid contact member so that the electrolytic water infiltrates into the gas-liquid contact member, an air blowing fan for bringing indoor air sucked from the air suction port into contact with the electrolytic water infiltrating in the gas-liquid contact member and blowing out the indoor air from the air blow-out port, a water receiving portion for receiving the electrolytic water passed through the gas-liquid contact member, and a foreign material removing mechanism for removing foreign materials contained in the electrolytic water. The foreign material may be a filter member disposed in front of the gas-liquid contact member, or a dam member disposed in the water receiving portion.

Abstract: An internal static mixing system such as a disperser of mesh wire or expanded metal co-knit with a multi filament material selected from inert polymers, catalytic polymers, catalytic metals or mixtures in combination with a vertical reactor having a reaction zone and the disperser disposed in said reaction zone, particularly for carrying out paraffin alkylation using acid catalyst is disclosed. The wire mesh provides the structural integrity of the system as well as the open space required in reactors for the movement of vapors and liquids though the system. The disperser may be in sheets, bundles or bales or positioned within a frame.

Abstract: A liquid film is formed on the surface of a porous body provided with a hydrophobic layer and hydrophilic layer, by moving thereon an ionic liquid having a selective absorption capacity of specific gas, and the specific gas within the gas to be processed is absorbed into the liquid film by bringing pressurized gas to be processed into contact with the liquid film. The specific gas is, for example, a carbon dioxide gas and the ionic liquid is, for example, an imidazolium salt. The specific gas absorbed into the liquid film is passed through the porous body by the use of a difference in pressure, whereby it is collected on a low pressure side. The specific gas absorbed into this collected liquid is then separated into a gas and a liquid by a separator, and the specific gas is released and collected.

Abstract: In one aspect of the invention there is provided a gas scrubbing system for removing contaminants from a flow of fluid, comprising a container having an interior volume, an inlet for receiving the flow of fluid and an outlet for dispensing the stream of fluid, a treatment liquid, a porous medium positioned in the interior volume, between the inlet and outlet, said porous medium providing a high surface area to facilitate chemical interactions between the fluid flow and the treatment liquid and means to apply the treatment liquid onto the porous medium. A contact cell aspect of the porous medium and a method aspect are also provided.

Abstract: In one aspect, ozone is quenched from a water stream, such as a drinking water or wastewater stream being treated with ozone, by contacting the stream with magnesium thiosulfate. In another aspect, a method of scrubbing ozone from a gaseous stream comprises contacting the gaseous stream with magnesium thiosulfate. In an alternative embodiment, chlorine is quenched from a water stream by contacting the stream with magnesium thiosulfate or potassium thiosulfate. In yet another aspect, a method of scrubbing chlorine from a gaseous stream comprises contacting the stream with magnesium thiosulfate or potassium thiosulfate. In another embodiment, a thiosulfate, such as magnesium thiosulfate, calcium thiosulfate, potassium thiosulfate, or sodium thiosulfate, is provided on an air filter for scrubbing ozone or chlorine from gaseous streams.

Abstract: A device is provided for extracting water from atmospheric air (8) having a free-flowing adsorbent or absorbent (3, 13), in particular a saline solution (3), having a hygroscopic salt for the adsorption or absorption of water, the adsorption or absorption being provided at least along an adsorption or absorption section (7), which realizes a high yield of (potable) water per unit volume of the structure or of the absorbent/adsorbent (3), a decrease in the assembly effort and a stabilization of the process. This is achieved according to the invention in having a free-flowing adsorbent (3, 13) or absorbent (3, 13) disposed at least along the adsorption or absorption section (7) essentially on a guide element (1, 16, 19, 22, 24) for guiding the adsorbent (3) or absorbent (3), in particular on a presettable track.

Abstract: Method for the dissolution of a gas in an input gas flow, in which a soaked solid comprising a porous substrate comprising pores each having a size less than 100 nanometres (nm) and each containing a solvent of the gas, is swept with the input gas flow comprising at least the gas.

Abstract: An air/liquid exchanger comprising an open-cell foam 102 supporting a liquid sorbent. The exchanger may be used for removing trace gaseous components from the air.

Abstract: A process for the extraction of an unwanted material from a gas comprising the steps of introducing an extraction liquid into a fluid having an unwanted liquid therein to form a physical aerosol comprising a plurality of extraction liquid droplets and the fluid, allowing the plurality of extraction liquid droplets to interact with the unwanted liquid in the gas to cause the extraction liquid droplets to be “wetted out” and captured on a porous medium, where the liquid is further contacted by the gas and simultaneously formed into a plurality of coalesceable droplets, coalescing the coalesceable droplets into larger droplets containing the unwanted liquid, and separating the larger droplets containing the unwanted liquid from the fluid.

Abstract: Microbicidal air filter for use with an air passageway, which includes an immobilization network including fibers having substantially embodied therein an amount of at least one antimicrobial agent sufficient to substantially immobilize, retain and kill microbes suspended in a volume of air moving through the air passageway. The immobilization network is substantially permeable to air. A microbicidal facemask and a microbicidal air filter used in an air circulation system using the immobilization network are disclosed.

Abstract: A mixing element, which is produced at low cost, has high mixture agitation effectiveness, and is easily made large, and a static fluid mixer using the mixing element are provided. Further, a gas-liquid treatment apparatus with high treatment ability is provided. A mixing element 1 includes: a cylindrical passage tube 2 trough which fluid flows; a plurality of spiral rightward rotation type first blades 3 formed of a perforated object, which are provided in the passage tube 2; a first inner cylindrical tube 5 shaped like a cylinder and disposed inside the blades 3; a plurality of spiral rightward rotation type blades 6 provided in the inner cylindrical tube 5; and an opening 9 formed in the axial center portion of the blades 6. A static fluid mixer is formed by using at least one mixing, element 1 mentioned above.

Abstract: Drop separator arrangement for a gas scrubber, with at least one drop separator layer which comprises a plurality of profile sets having drop separator lamellae arranged in a V-shaped manner and which is equipped with at least one scavenging device for the regular washing of the drop separator lamellae, the profile sets being capable of being arranged on carrying beams of the gas scrubber, characterized in that the drop separator lamellae have a mounting which is arranged in the flow shadow of the carrying beam.

Abstract: The present invention relates generally to a filtration article, such as a protective facemask, a method for using a filtration article, and a method for preparing a filtration article. In particular, the invention relates to a protective facemask that cost-effectively offers a broad spectrum of antimicrobial protection through the use of fibers treated with one or more oligodynamic metal and/or salt of an oligodynamic metal.

Abstract: A filter regeneration apparatus of a coal gasification system having a filter for capturing char (unburned matter) present in exhaust gas at an exhaust gas passage communicating with exhaust gas source including a coal gasification furnace, fills the filter container with inactive gas having oxygen concentration of less than 5 vol. % and heat the filter to a target temperature of 400 to 450° C. and feed ashing gas having oxygen concentration of 5 to 15 vol. %, thereby ashing char in the filter. This method and apparatus achieve ashing of char in a safe manner and shortens the time of regenerating the filter by controlling the oxygen concentration in the ashing gas and the filter temperature constantly to reach preset target values.

Abstract: The invention provides methods and apparatuses for removing additional aerosols and in some cases additional particulate matter from a gas stream, wherein a certain portion of such aerosols and particulate matter has already been removed using a primary aerosol and particulate collection device. In some embodiments, the invention comprises a method for removing additional aerosols from a gas stream that has aerosols previously removed by a primary aerosol collector, comprising passing a gas stream comprising a plurality of aerosols through a gas duct; removing a first portion of the plurality of said aerosols using a primary aerosol collector; passing the gas stream through a screen; and collecting at least a second portion of the plurality of aerosols on the screen. The invention also provides various apparatuses for use in performing the method of the invention.

Abstract: A low-resistance hydrocarbon adsorber comprising a spiral-wound laminated structure for mounting into an entrance port of an engine air intake system to prevent hydrocarbon evaporations from reaching atmosphere. Preferably, the adsorber is formed as a cartridge and comprises a flexible polymeric sheet support to which a thin flexible sheet of activated carbon sheeting is laminated on a first support side. The support is provided on a second side with features, for example, ribs or bumps, extending above the surface. When the laminate is spirally wound, the spiral convolutions are spaced apart by the features. Preferably, the convolutions are spaced apart by a distance such that there is a high probability that hydrocarbons migrating out of a shut down engine will encounter the adsorber and thus be adsorbed before reaching the atmosphere. The windings may fill all or a portion of the open area of the intake port.

Abstract: A process for effecting mass transfer between a liquid phase and a gaseous phase in a filled-type column comprising an external shell which accommodates at least one filler-containing basket wherethrough the phases are caused to flow in countercurrent relationship, advantageously comprises the step of feeding the gaseous phase to the at least one basket through a gas-permeable surface thereof which is larger than the basket cross-section, preferably in a prevailing radial flow direction.

Abstract: A system for removing at least one pollutant from an air stream exhaust, the system including a plurality of enclosures through which the air stream exhaust is directed to cool the air stream exhaust, a plurality of barriers within each respective enclosure to impede a flow of the air stream exhaust, a liquefied material, comprising bone glue, gelatin and/or skin glue, mixed with water provided within at least one of the plurality of enclosures, and wherein the air stream exhaust passes therethrough the liquefied material and at least one pollutant attaches to the liquefied material.

Abstract: Microbicidal air filter for use with an air passageway, which includes an immobilization network including a plurality of fibers having an amount of at least one antimicrobial agent incorporated and molecularly bonded into a structure thereof sufficient to substantially immobilize, retain and at least inhibit the growth of, or typically kill, microbes suspended in a volume of air moving through the air passageway. The immobilization network is substantially permeable to air. A microbicidal facemask and a microbicidal air filter used in an air circulation system using the immobilization network are disclosed.

Abstract: Particulates are removed from a gas stream by contact with a liquid. The gas stream is conveyed through an inlet channel, towards a liquid reservoir which is located below a perforated sheet. Gas flowing through holes in the sheet creates a pressure drop between the inlet channel and an outlet area above the sheet. This pressure drop draws liquid up from the reservoir, through a relatively narrow liquid transfer channel, so that the liquid covers the sheet. Gas flowing through holes in the sheet therefore encounters a layer of liquid located immediately above the sheet. Particulates in the gas are captured by the liquid in this layer. The device requires no pump for moving the liquid through the system, the liquid being transferred solely as a result of the pressure drop induced by the flow of gas.

Abstract: A process for effecting mass transfer between a liquid phase and a gaseous phase in a filled-type column having an external shell which accommodates at least one filler-containing basket wherethrough the phases are caused to flow in countercurrent relationship. The process includes the step of feeding the gaseous phase to the at least one basket through a gas-permeable surface thereof which is larger than the basket cross-section, preferably in a prevailing radial flow direction.

Abstract: A stepped, perforated tray is provided for increasing the available gas-slurry contact area in a flue gas desulfurization chamber. The tray redirects the horizontal flow upwardly through the tray for increased surface area and contact time with slurry for removing SOx or other contaminants from a fossil fuel combustion flue gas before releasing the flue gas to the atmosphere. The tray is adaptable for use in vertical tower systems as well.

Abstract: A system for delivering dry compressed gas is provided, the gas being separated from any entrained liquid lubricant and then passed through a moisture absorber column to interact with a moisture-removing fluid. The fluid is a liquid lubricant or is maintained in a separate closed circuit relative to the liquid lubricant. A moisture stripping device receives some of the gas from the absorber column, which is passed in moisture exchange relation with the fluid before the fluid enters the column. The column has a housing defining a vertical absorption zone, and partition plates each defining gas flow holes. The plates have at least one tube passing therethrough, with an open upper end above one plate, and a lower end adjacent the next lower plate. The fluid passes down the tubes and across a top surface of each plate, with the gas flow passing upwardly through the holes in the plates.

Abstract: An air filtering apparatus for purifying air. The air filtering apparatus includes an enclosure for coupling to ducting of a ventilation system. The enclosure has an interior defined by a top wall, a bottom wall, a pair of side walls, a first end wall, and a second end wall. A plurality of filters comprises a pair of wet filters and a pair of dry filters positioned in the interior. A pair of pump members supplies water from an enclosure reservoir to each of the wet filters. A supply assembly supplies water to the enclosure reservoir. A drain assembly drains the enclosure reservoir at preset intervals. A fan member forces exterior air through each of the filter members and outwardly through a duct aperture in the first end wall. A control assembly controls each of the pump members and the drain assembly to coordinate a purge sequence of the enclosure reservoir.

Abstract: A method and apparatus for wet filtering machine exhaust is disclosed.

Abstract: Modification, neutralization and/or decontamination of airborne biological and/or chemical contaminants from a breathable atmosphere by subjecting the breathable atmosphere to a filter which is formed from a plurality of polymeric multilobal fibers. These fibers include a central core with T-shaped lobes projecting therefrom, wherein each T-shaped lobe has a leg and a cap. The lobes define a longitudinally extending internal cavity between two adjacent legs that extends the entire length of the fiber. The filter is impregnated with a biological and/or chemical decontamination reagent for chemically modifying, neutralizing and/or decontaminating airborne biological and/or chemical contaminants from a breathable atmosphere. A filter projection preferably extends into an external reservoir containing a supply of biological and/or chemical decontamination reagent. This configuration increases the capacity and efficiency of the filter, and causes a lower pressure differential across the filter.

Abstract: An air filtering material for air cleaning is formed of a nonwoven fabric of hollow chemical fibers having longitudinal interior holes containing an oil. The hollow chemical fibers have randomly formed minute cracks and/or fissures formed through the walls of the fibers. The cracks and/or fissures have a width of the order of 1 ìm . The oil gradually exudes from within the longitudinal holes through the cracks and/or fissures to wet the outer surfaces of the hollow chemical fibers to enhance the filtering ability of the air filtering material by binding dust particles by the sticky oil.