An air purification device includes a reactor having a hollow shape and extending in one direction, a discharge plasma generator comprising a first electrode disposed on an outer wall of the reactor and a second electrode disposed inside the reactor, where the discharge plasma generator is configured to generate a discharge plasma in a discharge region, a plurality of dielectric particles disposed on a packed-bed of the reactor, a liquid supplier which supplies a liquid into the reactor, and a liquid recoverer which recovers the liquid discharged from the reactor.

The present invention provides an apparatus for desubliming a target compound from a first gas mixture comprising the target compound, comprising: a desublimation means comprising a surface onto which desublimation of the target compound can occur, an inlet through which the first gas mixture can enter the apparatus such that it comes into contact with the surface of the desublimation means, a target compound recovery region, an outlet through which the target compound can leave the target compound recovery region and a cooling means that cools the desublimation means wherein the desublimation means comprises a continuous path that passes through the cooling means and the target compound recovery region and wherein the desublimation means is movable such that the surface continuously circulates between the cooling means and the target compound recovery region, along the path.

The present disclosure provides a filter material used for automobile air conditioning and capable of filtering out volatile organic compound (VOC) gas, including a sandwich structure (100) and an activated carbon fiber (ACF) non-woven fabric layer (200) located at one side of the sandwich structure (100), where, the ACF non-woven fabric layer (200) is composed of interleaved ACFs, and the ACF non-woven fabric layer (200) is compounded with the sandwich structure (100) via hot melt adhesive (HMA) (210).

The invention is directed to a process to convert a sulphur compound to bisulphide by direct or indirect transfer of electrons from a cathode of a bio-electrochemical cell to the sulphur compound under anaerobic conditions and in the presence of mixed culture comprising methanogens and suitably also a anaerobic or facultative anaerobic bacteria. The sulphur compound may be a thiol like methanethiol or ethanethiol or a polysulphide, like dimethyl disulphide.

An organic substance decomposition catalyst that contains a perovskite-type complex oxide denoted by a formula A.sub.xB.sub.yM.sub.zO.sub.w, where A includes Ba, B includes Zr, M represents Mn and Co, a composition ratio of Mn to Co is represented by Mn:Co=z1:z2, z=z1+z2, y+z=1.000, 0.100≤z1+z2≤0.200, 0.00<z1/(z1+z2)<0.75, and w represents a positive value satisfying electrical neutrality.

Methods for estimating the solvency potential for various chemical additives used for asphaltene deposit remediation or inhibition have been developed. These methods can be used for remediating or inhibiting asphaltene deposition in various applications including upstream production (e.g., near-wellbore, downhole, flow-lines, separators), midstream processes (e.g., pipe lines, transport, and storage), and downstream (e.g., hydrocarbon refining).

A genetically modified houseplant capable of reducing levels of volatile organic carcinogenic compounds, such as formaldehyde, benzene, and chloroform, in the indoor air in urban homes of developed countries is disclosed. The plant expresses a detoxifying transgene, mammalian cytochrome P450 2e, and has shown sufficient detoxifying activity against benzene and chloroform. Air purifying biofilters utilizing the plants and methods of their use are also disclosed.

An organic material decomposition catalyst that contains BaCO.sub.3 and a perovskite composite oxide represented by A.sub.xB.sub.yM.sub.zO.sub.w, wherein A contains Ba, B contains Zr, and M denotes Mn. A peak intensity I(BaCO.sub.3(111)) of BaCO.sub.3(111) of the BaCO.sub.3 and a peak intensity I(BaZrO.sub.3(110)) of a perovskite composite oxide A.sub.xB.sub.yM.sub.zO.sub.w(110) of the perovskite composite oxide represented by A.sub.xB.sub.yM.sub.zO.sub.w, each determined by X-ray diffractometry of the organic material decomposition catalyst, have a ratio I(BaCO.sub.3(111))/I(BaZrO.sub.3(110)) in a range of 0.022 to 0.052. In another aspect, in the perovskite composite oxide represented by A.sub.xB.sub.yM.sub.zO.sub.w, 1.01≤x≤1.06, 0.1≤z≤0.125, and y+z=1 are satisfied, w denotes a positive value that satisfies electroneutrality, and the organic material decomposition catalyst has a specific surface area in the range of 12.3 to 16.9 m.sup.2/g.

Described is related to nano-structured composite materials for removing harmful chemical air pollutants and odors from the air to prevent people from breathing in disease-causing chemicals and provide them with clean indoor air. The nano-structured composite materials comprise nano-catalysts embedded in the pores of nano-structured substrate materials selected from the group consisting of nano-porous carbon, nano-porous rare earth oxide, nano-porous zeolite, nano-porous alumina and nano-porous silica. The nano-scale synergy of nano-catalysts and nano-structured substrate materials provides effective air filtration materials for the complete trapping and elimination of the full spectrum of chemical air pollutants including both organic and inorganic compounds and odors for indoor spaces, which HEPA or activated carbon filters cannot achieve.

Monolithic composite photocatalysts for fluid purification are disclosed. The monolithic composite photocatalysts comprise a photoactive nanocrystal component and a non-photoactive porous support. Photocatalytic fluid purification systems that contact an impurity-containing fluid with the subject monolithic composite photocatalysts are also disclosed. The monolithic composite photocatalysts may be affixed to or embedded in scaffold structures to promote fluid flow through a fluid purification system and contact with the monolithic composite photocatalysts.