An aqueous coating composition that includes a binder, pigment, and a formaldehyde scrubbing urea compound. When applied to a substrate, the coating composition absorbs formaldehyde and other air pollutants from passing air.

A carbon dioxide fixation method includes a step of preparing a calcium-containing substance containing calcium, a step of preparing a calcium extraction substance for extracting calcium ions from the calcium-containing substance by a reaction with the calcium-containing substance to produce a calcium-containing intermediate, a step of producing a gel including the calcium-containing intermediate, by mixing the calcium-containing substance and the calcium extraction substance, a step of supplying a basic substance and carbon dioxide to the gel including the calcium-containing intermediate to precipitate calcium carbonate which is slightly soluble, and a step of removing the precipitated calcium carbonate.

A media design for modular use in an air cleaning or HVAC systems to removes gas phase contaminants. The design allows for a control of gas contaminant removal using variable media length, path length, and contact time to ensure a contained MTZ length and low pressure drop. In one embodiment, the design includes a filter module at an angle to an airflow and an air filter mounted within the filter frame. The filter module may include channels therethrough that are oriented at the optimum angle in relation to the airflow to provide the required dwell time and pressure drop for a given application.

An air filtering system includes a main system and a filtering module. The main system includes a main body having an air inlet, an air flow cover having an air outlet, and a primary filtering core replaceably disposed in the main body, wherein the air flow cover is detachably coupled at the main body to form a basic air filtering mode for filtering air from the air inlet to the air outlet through the primary filtering core. The filtering module is detachably coupled between the main body and the air flow cover to form an advanced air filtering mode, wherein the filtering module includes a secondary filtering core arranged for filtering the air after passing through the primary filtering core and before existing the air outlet.

A composite material is provided comprising a porous polymeric matrix having metal-organic framework (MOF) domains dispersed within the porous polymeric matrix, each of said MOF domains in fluid communication with the external environment through the pores in the porous polymeric matrix. A process of using the composite material to chemically modify or detoxify a chemical warfare agent or a toxic industrial chemical is also provided. The chemical warfare agent or the toxic industrial chemical is brought into contact with a MOF domain within the porous polymeric matrix so that the MOFs adsorb and chemically modify the chemical warfare agent or the toxic industrial chemical. A process for producing such a composite material is also disclosed.

One variation of a method includes: conveying a mixture of air in a working fluid through a compressor to heat and pressurize the mixture to promote absorption of carbon dioxide into the working fluid; depositing the mixture in a high-pressure vessel configured to remove air from the mixture of carbon dioxide in the working fluid; conveying the mixture through a turbine to reduce pressure and promote desorption of carbon dioxide from the working fluid; depositing the mixture in a low-pressure vessel for removal of carbon dioxide; in response to a temperature of an interior environment falling below a target range, conveying the working fluid through a heating element configured to transfer heat from the working fluid into the interior environment; and, in response to the temperature exceeding the target range, conveying the working fluid through a cooling element configured to transfer heat from the working fluid into an exterior environment.

An air separation device and a refrigerating and freezing device. The air separation device comprises a support frame and an air separation membrane, wherein a supporting surface with a channel and an enriched-gas collection chamber communicated with the channel are formed in the support frame. The air separation membrane laid on the support surface of the support frame and configured to enable more of a specific gas than other gases in airflow of the space around the air separation device to enter the enriched-gas collection chamber through the air separation membrane. According to the air separation device provided by the present invention, the support frame is specially designed to adopt the structure provided with the support surface and the enriched-gas collection chamber, the channel communicated with the enriched-gas collection chamber is formed on the support surface, and the air separation membrane is disposed on the support surface.

The invention provides a system for sanitizing fluids such as water and air. In particular, the invention provides a combination of solid chlorhexidine and a polymer matrix, for which effluents are essentially free of leached chlorhexidine. The systems enable rapid disinfecting of fluids, including in line at the point of use, and can be employed for both high volume applications and disposable single-use applications.

Injecting CO2 that is diluted within water, into a coal seam, which allows for the sequestering and control of downhole CO2 within connected fractures without damaging the subterranean formation.

The present invention is directed to a method, device and system to capture carbon dioxide in air using solid amine sorbents and using a radio frequency and/or microwave generator to desorb the carbon dioxide by directly exciting the amine-carbon bond thereby significantly reducing the energy cost of releasing the carbon dioxide.