An adsorbent separates methanol and other alcohols from gas and liquid oxygenates and hydrocarbon streams with a low silica faujasite (LSX) in a mono-, bi, or tri-cation alkali and/or alkaline-earth metal forms. The LSX has silicon to aluminum ratio from about 0.9 to about 1.15 and an ion exchange degree for each alkali or alkaline-earth metal in the range of about 10 to about 99.9% equiv. The gas streams for treatment include natural gas, individual hydrocarbons, or vaporized alkyl esters of carboxylic acids, or methyl tert-alkyl ethers and their mixtures with hydrocarbons. The liquid streams include liquefied natural gas (LNG), liquefied petroleum gas (LPG), natural gas liquid (NGL), individual hydrocarbons C.sub.3-C.sub.5, and monomers, alkyl esters of carboxylic acids including methyl acetate, methyl, ethyl, butyl acrylates and methacrylate, methyl tert-alkyl ethers including methyl tert-butyl ether (MTBE) and methyl tert-amyl ether (TAME). The adsorbent is especially suited for temperature swing or pressure swing adsorption processes.

A CO.sub.2 recovery device is provided with a CO.sub.2 absorption tower and an absorption-solution regeneration tower. The CO.sub.2 absorption tower includes: a CO.sub.2 absorption section in which CO.sub.2-containing flue gas is brought into contact with a CO.sub.2 absorption solution, namely a basic-amine-compound absorption solution, so as to remove CO.sub.2 from the CO.sub.2-containing flue gas; and a water-washing section in which decarbonated flue gas from which CO.sub.2 has been removed is brought into contact with washing water so as to remove accompanying substances accompanying the decarbonated flue gas. The absorption-solution regeneration tower regenerates the CO.sub.2 absorption solution that has absorbed CO.sub.2. This CO.sub.2 recovery device, in which a lean solution from which CO.sub.2 has been removed is reused in the CO.sub.2 absorption tower, has an aldehyde-removing agent supply unit that supplies a sulfite-compound aldehyde removing agent to a circulating washing-water line that circulates the washing water to the water-washing section.

A system for decomposing contaminants, including volatile compounds (VOCs), with a visible-spectrum photocatalytic composition.

Provided are a solvent separation method, a solvent separation apparatus, and a solvent separation system that make it possible to easily collect a solvent removed from an exhaust atmosphere and that sake it possible to easily carry out maintenance of exhaust gas pathways. An impeller placed in a storage space of a casing is rotated to introduce a gas including a volatilized solvent from an inlet of the casing into the storage space, and the volatilized solvent is cooled and devolatilized by a collection face that has been cooled so as to have a surface temperature lower than the temperature of the gas, to thereby separate the solvent from the gas.

A device for the removal of volatile organic compounds including at least one first connector arranged at the outlet of a gas stream to be treated. At its top, has a connection extension that links with the bioreactor located in the middle part of the device (having a nutrient solution where organisms that degrade volatile organic compounds can grow). Additionally, there is a dispersion arrangement that couples with an outlet through which the gaseous stream, once treated, is expelled out to the environment. A distribution network of a nutritive solution with microorganisms that degrade volatile organic compounds. The connection extension includes a distributor cone that is arranged in an inverted way and internally emptied and also has a cylindrical extension at its top. The distributor cone allows the airflow to be displaced by an external path into the internal walls of the distributor cone, whose cylindrical extension connects with a second perforated cylinder with multiples drill holes throughout its periphery. The axial axis of the cylindrical extension coincides with the axial axis of the distributor cone. The perforations of this second perforated cylinder are arranged so that the gas output can enter the bioreactor from its bottom.

The present invention relates to an improved method for removing contaminants from a gaseous stream substantially comprising carbon dioxide. More specifically, the method comprises the step of subjecting the gaseous stream to an absorption step in which the absorbent is liquid carbon dioxide wherein the waste of carbon dioxide is minimized by utilizing a compressing means for generating a pressure difference between two streams in a reboiler.

An effective ethanol emission treatment system usable at buildings such as spirit aging warehouses which biologically removes ethanol prior to air escaping to the atmosphere is disclosed. The system can be used either with or without imparting negative pressure on the building to draw the ethanol vapors into the treatment system. The system provides efficient removal of ethanol from large volumes of air having relatively low ethanol concentrations.

In a method for separating organic solvents from solvent-containing process exhaust air, the process exhaust air is directed through a separation zone of a separating device, and the separating device is regenerated by passing a regeneration stream through a regeneration zone of the separating device. The regeneration stream passing through the separating device during regeneration is divided into a first partial stream having an impurity concentration less than a first predetermined limit, and a second partial stream having an impurity concentration equal or greater than a second predetermined limit, by means of a dividing means, wherein the second predetermined limit is equal to or greater than the first predetermined limit, to return the first partial stream generated during regeneration to the separating device and direct the second partial stream generated during regeneration to a cleaning device.

Disclosed is a novel air purification composition with antiviral and bactericidal functions, the composition at least comprising the following components in percentage by weight: 0.3%-1% of a black poplar essential oil, 0.1%-1% of a tea tree essential oil, 0.1%-0.5% of a Cupressus funebris essential oil, 0.1%-1% of an Artemisia apiacea essential oil, 0.1%-10% of a Sophora flavescens extract, 0.1%-5% of a ginger extract, 5%-30% of a Cupressus funebris hydrolate, 0.5%-1% of a hyperbranched amino polymer, 0.5%-5% of a surfactant, and the balance being water.

A method and apparatus are provided for recovering an amine solvent from an acid gas stream. The apparatus includes a water wash recovery column, a nozzle for spraying water wash and an amine nucleation agent into the water wash recovery column and an inlet port for introducing acid gas into the water wash recovery column adjacent the lower end thereof. The method includes the steps of treating the acid gas stream in the water wash recovery column with a counter-current flow of water wash in an amine nucleation agent, discharging treated acid gas from an upper end of the water wash recovery column and collecting water wash, amine nucleation agent and entrained amine solvent from the acid gas stream and a sump at a lower end of the water wash recovery column.