A gas exchange device for filtering a gas is provided. The gas exchange device includes a gas-intake channel having a gas-intake-channel inlet and a gas-intake-channel outlet, a gas-exhaust channel disposed aside the gas-intake channel and including a gas-exhaust-channel inlet and a gas-exhaust-channel outlet, a purification unit disposed in the gas-intake channel for filtering the gas passing through the gas-intake channel, a gas-intake guider and a gas-exhaust guider for guiding the gas, a driving controller disposed in the gas-intake channel near the gas-intake guider for controlling enablement and disablement of the purification unit, the gas-intake guider and the gas-exhaust guider, and a gas detection main body for detecting the gas and generating detection data.

The present invention relates to an exhaust gas purification system comprising two catalytic sub-systems, wherein the first catalytic sub-system is for conversion of NOx, HC, CO and optionally particulate matter, and the second sub-system is for conversion of CO. The second sub-system locates at the downstream of the first catalytic sub-system. An air injection is positioned between the first catalytic sub-system and second catalytic sub-system.

A chemical protective shelter system for encapsulating an uncontaminated person or persons is presented. The chemical protective shelter system has a cover assembly extending a length between a top end and a bottom end and having interior surface and an exterior surface and an opening which can be opened and closed repeatedly while still sealing. The chemical protective shelter system includes a layer of a chemical adsorbent material capable of filtering chemical agents while allowing oxygen and carbon dioxide to pass through the material. The chemical protective shelter is specially adapted to house a plurality of people and facilitate a tent like function. The system also includes a port for auxiliary filtered air. The system may also include a powered air purifying respirator which positively pressures the interior space of the system.

There is disclosed a system and process for purifying air. The system includes a housing and a plurality of inner and outer chambers. A solution of water and a biological reagent is configured to flow around the inner and outer walls of the inner and outer chambers while air is passed adjacent to this fluid flow. This causes an interaction between the air and the fluid solution to cleanse the air. The air is then discharged from the chamber. There is also disclosed a container having a rolling base allowing the container to be more transportable.

An air mover for forcing air through the system, a pre-treating stage with a particulate filter for removing larger contaminants from the air and an antimicrobial (e.g., copper and silver) filter for killing or damaging microorganisms, a UV chamber including an ultraviolet lamp that emits radiation and a catalytic (e.g., TiO.sub.2-coated) device and a reflective (e.g., mirror-finish anodized aluminum) lining for amplifying the UV radiation for killing microorganisms, a post-UV stage including a VOC-reducing (e.g., activated-charcoal) filter for removing odors and VOCs from the air, and optionally a supply of a surface disinfectant (e.g., ClO.sub.2). In example embodiments, the UV lamps and VOC filters are selected and configured for controlling microbial pathogens, and in other example embodiments they are selected and configured for removing ethylene from the air.

There is disclosed a system and process for purifying air. The system includes a housing and a plurality of inner and outer chambers. A solution of water and a biological reagent is configured to flow around the inner and outer walls of the inner and outer chambers while air is passed adjacent to this fluid flow. This causes an interaction between the air and the fluid solution to cleanse the air. The air is then discharged from the chamber.

Methods of producing solid CO.sub.2 sequestering carbonate materials are provided. Aspects of the methods include introducing a divalent cation source into a flowing aqueous liquid (e.g., a bicarbonate rich product containing liquid) under conditions sufficient such that a non-slurry solid phase CO.sub.2 sequestering carbonate material is produced. Also provided are systems configured for carrying out the methods.

Provided is an unsaturated double bond-containing compound capable of sufficiently advancing a crosslinking reaction or a curing reaction when used for a coating material or the like and having oxygen absorption performance. The present invention also provides an oxygen absorbent containing the unsaturated double bond-containing compound and a resin composition containing the same. Provided are an unsaturated double bond-containing compound represented by general formula (I), an oxygen absorbent containing the same, and a resin composition.

An air cleaning device is disclosed. A first opening and closing member opens and closes an inlet of a housing. A second opening and closing member opens and closes an outlet of the housing. A first filter unit collects and separates foreign substances from contaminated air in the housing. A circulation tube has a first end portion disposed at the inlet to communicate with the housing and a second end portion disposed at the outlet to communicate with the housing. A third opening and closing member opens and closes the circulation tube. A first heater is installed inside the circulation tube to heat air in the circulation tube. A blower is installed inside the circulation tube to deliver air from the circulation tube into the housing.

A chemical protective shelter system for encapsulating an uncontaminated person or persons is presented. The chemical protective shelter system has a cover assembly extending a length between a top end and a bottom end and having interior surface and an exterior surface and an opening which can be opened and closed repeatedly while still sealing. The chemical protective shelter system includes a layer of a chemical adsorbent material capable of filtering chemical agents while allowing oxygen and carbon dioxide to pass through the material. The chemical protective shelter is specially adapted to house a plurality of people and facilitate a tent like function. The system also includes a port for auxiliary filtered air. The system may also include a powered air purifying respirator which positively pressures the interior space of the system.