A cartridge mounting an air treatment material is a housing defining a housing in a perimeter. The air treatment material is received within the housing, and spaced from the inner wall of the housing by a plurality of resilient sheets. There is an inlet direction into the housing for air flowing across the air treatment material and an outlet opening on an opposed side of the housing. There are top and bottom surfaces and side surfaces forming a perimeter about the air treatment material. The resilient sheets extend substantially continuously across the side surfaces and the top and bottom surfaces at least at the inlet end to increase airflow across the air treatment material. An enclosed inhabited space is also disclosed and claimed.

A system and method for providing dried inert gas to a protected space is disclosed.

A method of generating oxygen depleted air on an aircraft, and an aircraft fuel tank inerting system. The method including the steps of passing a first proportion of air through an air pressure reduction device to produce a supply of reduced pressure air, passing a second proportion along one side of a membrane of an air separation module, exposing the other side of the membrane of the air separation module to the reduced pressure air, so that oxygen is extracted from the second proportion of air across the membrane and the air separation module exhausts oxygen depleted air for inerting an aircraft fuel tank.

A filter assembly including a plurality of filter modules, wherein each filter module in the plurality of filter modules includes a frame, a filtration element coupled within the frame, and at least one mating feature. The at least one mating feature of each filter module is configured for selective engagement with the at least one mating feature of another filter module such that the plurality of filter modules are coupled together in a serial arrangement.

A device is disclosed for separating nitrogen and oxygen. The device includes an inlet in fluid communication with a source of a gas comprising oxygen and nitrogen, a membrane having a greater permeability to oxygen than to nitrogen. One side of the membrane is in fluid communication with the inlet, and the other side of the membrane is in fluid communication with an outlet for nitrogen-enriched gas. An outlet for oxygen-enriched gas is also in fluid communication with the first side of the membrane. A porous metal foam is disposed between the inlet and the membrane.

Disclosed herein are base metal catalyst devices for removing ozone, volatile organic compounds, and other pollutants from an air flow stream. A catalyst device includes a housing, a solid substrate disposed within the housing, and a catalyst layer disposed on the substrate. The catalyst layer includes a first base metal catalyst at a first mass percent, a second base metal catalyst at a second mass percent, and a support material impregnated with at least one of the first base metal catalyst or the second base metal catalyst. The preferred catalyst composition is a combination of manganese oxide and copper oxide.

An equipment cleaning apparatus for an extraplanetary environment includes a cleaner vessel positioned at an exterior of an extraplanetary habitat, and an exterior hatch located outside of the extraplanetary habitat and allowing access to an interior of the cleaner vessel. The cleaning apparatus is operable in one or more cleaning cycles to clean equipment located in the cleaner vessel. A method of cleaning equipment in an extraplanetary environment includes providing a cleaner vessel at an extraplanetary habitat, placing one or more articles of equipment into an interior of the cleaner vessel through an exterior hatch located outside of the extraplanetary habitat, closing the exterior hatch, and operating one or more cleaning cycles on the equipment in the cleaner vessel.

A system is disclosed for providing inerting gas to a protected space. The system includes an electrochemical cell including a cathode, an anode separated by a separator that includes an ion transfer medium, and an electrical connection to a power source or power sink. A cathode fluid flow path is in operative fluid communication with a catalyst at the cathode between a cathode fluid flow path inlet and a cathode fluid flow path outlet, and an anode fluid flow path is in operative fluid communication with a catalyst at the anode, and includes an anode fluid flow path outlet. A cathode supply fluid flow path is disposed between the protected space and the cathode fluid flow path inlet, and an inerting gas flow path is in operative fluid communication with the cathode flow path outlet and the protected space.

The present invention is a sorbent-based atmosphere revitalization (SBAR) system using treatment beds each having a bed housing, primary and secondary moisture adsorbent layers, and a primary carbon dioxide adsorbent layer. Each bed includes a redirecting plenum between moisture adsorbent layers, inlet and outlet ports connected to inlet and outlet valves, respectively, and bypass ports connected to the redirecting plenums. The SBAR system also includes at least one bypass valve connected to the bypass ports. An inlet channel connects inlet valves to an atmosphere source. An outlet channel connects the bypass valve and outlet valves to the atmosphere source. A vacuum channel connects inlet valves, the bypass valve and outlet valves to a vacuum source. In use, one bed treats air from the atmosphere source while another bed undergoes regeneration. During regeneration, the inlet, bypass, and outlet valves sequentially open to the vacuum source, removing accumulated moisture and carbon dioxide.

An air separation unit for an OBOGS includes a housing having an inlet for receiving a wet inlet air and an outlet for outputting a dry product gas. The housing includes an outer side wall and annular walls defining a series of concentric annular chambers. A first annular chamber is coupled to the inlet and includes a desiccant material to receive the wet inlet air and output a dried air. An unfilled second annular chamber is coupled to the first annular chamber. A third annular chamber is coupled to the second annular chamber at a first end and the outlet at a second end. The third annular chamber receives air separation material to selectively remove unwanted constituents from the dried air and output the dry product gas. A tap may be coupled to the second annular chamber so that dried air may be removed from the housing.