Porous materials (such as organic polyamine cage compounds) and methods of stabilising porous materials which are otherwise prone to pore-collapse are described. Such stabilisation is accomplished through the use of molecular ties to create bridges between reactive groups of a (potentially) porous material to thereby strengthen and stabilise the porous structure. The chemistry involved in, and the results of, the stabilisation of porous materials to provide a new sorption composition comprising the very materials which are generally prone to pore-collapse are also described.

A method and system relate to an odor absorbing paint and a preparation method thereof. Some embodiments of the disclosure provide a method for making an odor absorbing paint by binding activated carbon particles to tourmaline particles with acrylic emulsion as an adhesive. In other embodiments, the tourmaline particle component in the odor absorbing paint can release negative ions for a long time. These released negative ions can form neutral coordination compounds with indoor toxic and harmful gas particles. In further embodiments, the coconut shell activated carbon particle component can adsorb the neutral coordination compounds, so that the toxic and harmful gas particles will remain in tubular micropores inside the activated carbon, and will not be desorbed to leave.

A host material may be used for the separation of elements or compounds, wherein the host material is an organic molecular solid with suitable cavities for accommodating a guest material to be separated, and with interconnections between the cavities to allow the guest material to diffuse through the host material, and wherein said interconnections are closed for a proportion of the time or have a static pore limiting diameter which is smaller than the static dimension of the guest material. Applications include separations of rare gases, chiral molecules, and alkanes. One class of suitable host materials may be made by imine condensation.

An absorbent compound and method of making the same, where the absorbent compound includes an amine oxide that comprises about 30% to about 55% of the absorbent compound and a polymer that comprises about 30% and about 55% of the absorbent compound.

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.

A process of removing a volatile organic compound (VOC) from a gaseous environment, involving contacting a gaseous feedstream containing one or more VOC's, such as an odoriferous compound, an irritant, a contaminant or pollutant, for example, formaldehyde, with a sorbent under conditions sufficient to reduce the concentration of the VOC's in the gaseous feedstream. The sorbent is comprised of a functionalized graphene prepared by amination of graphene oxide. The sorbent is regenerated by adsorbate desorption under mild conditions of air flow. The process can be run through multiple adsorption-desorption cycles in a single fixed bed or swing bed configuration, and is applicable to purifying indoor air and ventilation air as well as reducing pollutants in industrial waste gas streams.

The present invention relates to the field of air cleaning, and specifically discloses an air freshener composition. The air freshener composition comprises component A and component B, wherein a weight ratio of the component A to the component B is 1:0.5-3; the component A comprises, in parts by weight, 10-30 parts by weight of an active agent; 6-15 parts by weight of a carrier; 1-4 parts by weight of a pH regulator; and 0.01-0.2 part by weight of an antioxidant; the component B is a plant extract solution, wherein the plant extract solution comprises at least, in parts by weight: 5-30 parts by weight of an extract of a mixture of Populus nigra var. italica, grapefruit peels and eucalyptus leaves; 0.1-5 parts by weight of Sophora flavescens extract; 1-3 parts by weight of Aloe vera extract; 1-10 parts by weight of fresh orange peel extract; 0.5-3 parts by weight of Nandina domestica extract; 0.5-10 parts by weight of Eucalyptus robusta Smith extract; 1-8 parts by weight of Robinia pseudoacacia L. extract; 1-5 parts by weight of Chrysanthemum morifolium extract; and 0.1-2 parts by weight of artemisinin.

Some embodiments of the disclosure correspond to, for example, a method for controlling a scrubber containing an adsorbent. The scrubber may be configured to cycle between scrubbing at least one pollutant/gas from a stream of gases with the pollutant/gas being adsorbed onto the adsorbent, and regenerating at least some of the adsorbent and thereby purging at least some of the one pollutant and/or first gas from the adsorbent via a regeneration gas flow. The method may include flowing a stream of gases through the scrubber, the scrubber including the adsorbent and adsorbing at least some of the one pollutant/gas from the stream of gases onto the adsorbent during an adsorption phase over a first time period. The method may also include purging at least a portion of the one pollutant/gas from the adsorbent during a regeneration phase over a second time period with a regeneration gas flow, and cycling therebetween.

Materials which react with (scavenge) sulfur compounds, such as hydrogen sulfide and mercaptans, are useful for limiting sulfur-induced corrosion. Surface-modified particles incorporating a hexahydrotriazine moiety are disclosed and used as sulfur scavengers. These surface-modified particles are used a filter media in fixed filter systems and as additives to fluids including sulfur compounds. The hexahydrotriazine moiety can react with sulfur compounds in such a manner as to bind sulfur atoms to the surface-modified particles, thus allowing removal of the sulfur atoms from fluids such as crude oil, natural gas, hydrocarbon combustion exhaust gases, sulfur polluted air and water. The surface-modified particles may, in general, be sized to allow separation of the particles from the process fluid by sedimentation, size-exclusion filtration or the like.

According to various embodiments, a direct air capture system includes: a wind turbine that includes at least one blade that includes one or more openings, wherein, in operation, first air flows across the at least one blade, causing the wind turbine to generate electrical energy, and causing the one or more openings to receive second air; a conduit that fluidly couples the one or more openings to a carbon dioxide (CO.sub.2) adsorption chamber that includes one or more amine-based CO.sub.2 adsorbers, wherein, in operation, the CO.sub.2 absorption chamber receives the second air via the one or more openings; and a carbon desorption apparatus that desorbs CO.sub.2 from the one or more amine-based CO.sub.2 adsorbers.