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.

An anaesthetic halocarbon capture system is provided. The system includes a pressure-intolerant sleeve containing filter material for capturing one or more types of anaesthetic halocarbon prior to supercritical fluid extraction, and a pressure-tolerant housing into which the sleeve can be inserted so as to permit exposure of the sleeve contents to pressures required for supercritical fluid extraction.

A high-efficient particulate air filter assembly including a high efficient particulate air filter for filtering the intake air as it enters an air purifying system is provided. The air filter assembly can further include a housing configured for use in an air purification system; a first prefilter positioned in the housing upstream from the particulate air filter; and an electrostatically charged substrate positioned in the housing downstream from the particulate air filter. The air filter assembly can further include a second prefilter having a paper layer; a carbon layer; a zeolite layer; a mesh layer; and a foam layer.

An oxygen scavenger composition including a mixed granule that includes a water retention agent, a swelling agent, a metal salt, water, and iron, as well as a method for producing the oxygen scavenger composition, the method including: collectively mixing a water retention agent, a swelling agent, a metal salt, water, and iron for granulation.

Disclosed is an adsorbent containing a metal oxide for adsorption of hydrogen sulfide in biogas, and a biogas purification system using the same.

The present disclosure relates to methods for producing metal sulfide disposed on particle substrates. In at least one embodiment, a method for producing an alkali earth hydroxide particle having a metal sulfide disposed thereon includes introducing an alkali earth oxide particle with a metal sulfate to form a first composition. The method includes introducing an alkali sulfide or an alkali earth sulfide with the first composition to form a second composition. The present disclosure further relates to compositions of matter having metal sulfide disposed on a particle substrate. In at least one embodiment, a composition of matter includes an alkali earth hydroxide particle. The composition of matter includes a metal sulfide disposed on the alkali earth hydroxide particle.

An air filtration system which pulls air into and through the air filtration system filter where the air is exposed to a UV lamp that provides UV light, the UV lamp surrounded by an internally polished aluminum shield or other device made of a material that reflects or enhances kill ability of micro-organisms when exposed to UV light.

The present disclosure relates to hydrocarbon emission control systems. More specifically, the present disclosure relates to substrates coated with hydrocarbon adsorptive coating compositions and evaporative emission control systems for controlling evaporative emissions of hydrocarbons from motor vehicle engines and fuel systems. The hydrocarbon adsorptive coating compositions include particulate carbon having a BET surface area of at least about 1300 m.sup.2/g, and at least one of (i) a butane affinity of greater than 60% at 5% butane; (ii) a butane affinity of greater than 35% at 0.5% butane; (iii) a micropore volume greater than about 0.2 ml/g and a mesopore volume greater than about 0.5 ml/g.

The present disclosure relates to systems and electroswing adsorption cells with patterned electrodes. The patterned electrode includes a plurality of electrolyte regions, a plurality of gas regions and a conductive scaffold. The conductive scaffold extends into the plurality of electrolyte regions and includes an electroactive species. Methods for the manufacture of the electrode, the electroswing adsorption cell and gas separation systems including the electroswing adsorption cell are also described.

Embodiments discloses herein relate to methods of processing coal. A method to process coal includes subjecting raw coal to a liquefaction process effective to form a liquid pitch resin and subjecting the liquid pitch resin to a filtration process. The method further includes subjecting the liquid pitch resin to a low crystallinity spinning process to form a raw fiber. The raw fiber is then further subjected to a stabilization process configured to oxygen cross-link the fiber to form a stabilized fiber and then subjecting the stabilized fiber to a carbonization process to form a low thermal conductivity carbon fiber.