Abstract: An air filter including a filter support that supports porous, polymeric sorbent particles that comprise a divalent metal impregnated therein.

Abstract: An air filter including a filter support that supports porous, polymeric sorbent particles that comprise a divalent metal impregnated therein.

Abstract: An air filter including a filter support that supports polymeric sorbent particles. The polymeric sorbent is the reaction product of a divinylbenzene/maleic anhydride precursor polymeric material with a nitrogen-containing compound. The air filter may be used for capturing e.g. reactive gases.

Abstract: Various embodiments of a filter cartridge are disclosed. The filter cartridge includes a first filter media layer having first and second major surfaces, a second filter media layer having first and second major surfaces, and a plenum disposed between the first and second filter media layers. The filter cartridge further includes functional material disposed on the first major surface of each of the first and second filter media layers within a filter region of the filter cartridge, where the functional material includes active particles disposed on an adhesive layer; and a perimeter seal region that defines at least a portion of a perimeter of the filter cartridge, where at least the first and second filter media layers are connected together in the perimeter seal region. The functional material is not disposed in at least a portion of the perimeter seal region.

Abstract: An air filter including a filter support that supports polymeric sorbent particles. The polymeric sorbent is the reaction product of a divinylbenzene/maleic anhydride precursor polymeric material with a nitrogen-containing compound. The air filter may be used for capturing e.g. reactive gases.

Abstract: An air filter including a filter support that supports metal-containing sorbent particles, the sorbent particles comprising a precursor that is a porous siliceous material that has been treated with a surface treatment agent, and a divalent metal incorporated into the siliceous precursor material.

Abstract: An air filter including a filter support that supports porous, polymeric sorbent particles that comprise a divalent metal impregnated therein.

Abstract: A filtration device including a fluid-impermeable housing having a gas inlet and outlet, and containing within the housing first filter media particles of an extended surface area substrate and containing at least one metal impregnant, and second filter media particles of an extended surface area zirconium hydroxide substrate and zinc (hydr)oxide. The device may be used in atmospheres containing various harmful gases, and may provide particularly useful improvements in NOx breakthrough times compared to a device containing only the first filter media particles or only the second filter media particles.

Abstract: A filtration device including a fluid-impermeable housing having a gas inlet and outlet, and containing within the housing first filter media particles of an extended surface area substrate and containing at least one metal impregnant, and second filter media particles of an extended surface area zirconium hydroxide substrate. The device may be used in atmospheres containing various harmful gases, and may provide particularly useful improvements in NOx breakthrough times compared to a device containing only the first filter media particles or only the second filter media particles.

Abstract: A filtration device including a fluid-impermeable housing having a gas inlet and outlet, and containing within the housing first filter media particles of an extended surface area substrate and containing at least one metal impregnant, and second filter media particles of an extended surface area zirconium hydroxide substrate and containing zinc (hydr)oxide. The first or second filter media particles also contain an amine-functional material. The device may be used in atmospheres containing various harmful gases, and may provide particularly useful improvements in breakthrough times for nitrogen dioxide, hydrogen sulfide, ammonia and formaldehyde compared to a device containing only the first filter media particles or only the second filter media particles.

Abstract: A method for identifying and quantitatively analyzing an unknown organic compound in a gaseous medium. More specifically, the method provides a gas sensor array (120a, 120b, 120c, 120d) coupled to a diluting channeling gas inlet (105) with a honeycomb configuration. Each sensor (120a, 120b, 120c, 120d) in the array receives the test gas after successive dilutions. Detected gas are identified by correlating the responses of each sensor with its associated dilution.

Abstract: A filtration device including a fluid-impermeable housing having a gas inlet and outlet, and containing within the housing first filter media particles of an extended surface area substrate and containing at least one metal impregnant, and second filter media particles of an extended surface area zirconium hydroxide substrate and containing zinc (hydr)oxide. The first or second filter media particles also contain an amine-functional material. The device may be used in atmospheres containing various harmful gases, and may provide particularly useful improvements in breakthrough times for nitrogen dioxide, hydrogen sulfide, ammonia and formaldehyde compared to a device containing only the first filter media particles or only the second filter media particles.

Abstract: A filtration device including a fluid-impermeable housing having a gas inlet and outlet, and containing within the housing first filter media particles of an extended surface area substrate and containing at least one metal impregnant, and second filter media particles of an extended surface area zirconium hydroxide substrate and zinc (hydr)oxide. The device may be used in atmospheres containing various harmful gases, and may provide particularly useful improvements in NOx breakthrough times compared to a device containing only the first filter media particles or only the second filter media particles.

Abstract: A filtration device including a fluid-impermeable housing having a gas inlet and outlet, and containing within the housing first filter media particles of an extended surface area substrate and containing at least one metal impregnant, and second filter media particles of an extended surface area zirconium hydroxide substrate. The device may be used in atmospheres containing various harmful gases, and may provide particularly useful improvements in NOx breakthrough times compared to a device containing only the first filter media particles or only the second filter media particles.

Abstract: A method for identifying and quantitatively analyzing an unknown organic compound in a gaseous medium. More specifically, the method provides a gas sensor array (120a, 120b, 120c, 120d) coupled to a diluting channeling gas inlet (105) with a honeycomb configuration. Each sensor (120a, 120b, 120c, 120d) in the array receives the test gas after successive dilutions. Detected gas are identified by correlating the responses of each sensor with its associated dilution.