Abstract: A gas condensing device may be configured to condense regeneration gas and separate target gas from condensate. The gas condensing device may include: a housing; a condenser mounted in an upper portion of the housing and configured to condense the regeneration gas; and a reflux apparatus mounted in the housing below the condenser and configured to temporarily store the condensate and discharge evaporation gas evaporated from the condensate back to the condenser.

Abstract: A lean absorbent liquid supplier, disposed inside at an upper portion in the absorption tower housing, supplies a lean absorbent liquid into the housing. An absorption tower rectifier, disposed under the lean absorbent liquid supplier in the absorption tower housing, rectifies flow of the lean absorbent liquid supplied downwardly in the absorption tower housing, and dissolves an object gas in the lean absorbent liquid to generate a rich absorbent liquid. An absorbent liquid chamber, disposed below the absorption tower rectifier in the absorption tower housing temporarily stores the rich absorbent liquid therein. An absorption separator is disposed between the absorption tower rectifier and the absorbent liquid chamber in the absorption tower housing. The object gas is supplied to the absorbent liquid chamber.

Abstract: A gas condensing device may be configured to condense regeneration gas and separate target gas from condensate. The gas condensing device may include: a housing; a condenser mounted in an upper portion of the housing and configured to condense the regeneration gas; and a reflux apparatus mounted in the housing below the condenser and configured to temporarily store the condensate and discharge evaporation gas evaporated from the condensate back to the condenser.

Abstract: A gas capture plant is provided. The gas capture plant includes an absorption tower for dissolving an object gas that requires regeneration in a lean absorbent liquid to produce rich absorbent liquid. A regeneration tower heats the rich absorbent liquid produced in the absorption tower to produce the lean absorbent liquid from which the regeneration gas is separated and the produced lean absorbent liquid is supplied back to the absorption tower. A gas condensing device condenses the regeneration gas received from the regeneration tower to separate condensate and target gas, thereafter, supplying the separated condensate to the regeneration tower, and exhausting the separated target gas.

Abstract: Disclosed are an absorbent for acidic gas separation that include: an amount of about 1 wt % to 17.5 wt % of alkali-carbonate based on the total weight of the absorbent; an amount of about 1 wt % to 5.5 wt % of a heterocyclic amine compound based on the total weight of the absorbent; 1 wt % to 8 wt % of an alkyl substituent of the heterocyclic amine compound based on the total weight of the absorbent; and a residual amount of an aqueous solution; and a method for acidic gas separation that include: contacting the absorbent for acidic gas separation and a gas including an acidic gas.

Abstract: Disclosed is an active carbon that includes micropores having a diameter of about 0.5 nm to about 0.8 nm in a content of about 70 vol % to about 90 vol % based on the total volume of the total pores, and has a nitrogen-containing functional group introduced on the surface thereof. Moreover, disclosed is a method for preparing active carbon. The method may include steps of: forming a reaction mixture including a carbon precursor, an alkali salt, and an organic compound including a nitrogen-containing functional group; and heating the reaction mixture to a temperature of about 800° C. to about 1000° C. in the presence of nitrogen gas.

Abstract: A regeneration tower may include: a rich absorbent liquid supplier that supplies rich absorbent liquid into a first housing; a rectifier positioned below the rich absorbent liquid supplier and rectifying flow of the rich absorbent liquid supplied downwardly in the first housing; a reboiler positioned below the rectifier and separating regeneration gas from the rich absorbent liquid by boiling the rich absorbent liquid; a separator that supplies the rich absorbent liquid from the rectifier to the rich absorbent liquid tank, bypassing the regeneration gas generated in the reboiler into the first housing through a path different from a supply path of the rich absorbent liquid to the reboiler; and a lean absorbent liquid tank receiving lean absorbent liquid from which the regeneration gas is separated in the reboiler, where the reboiler receives the rich absorbent liquid only through the rich absorbent liquid tank.

Abstract: A system for absorbing and separating acid gases may include an absorbing tower in which a gas containing an acid gas is supplied, a recycling tower that is disposed close to the absorbing tower, an absorbent that absorbs an acid gas in the absorbing tower and discharges the acid gas back to the recycling tower while circulating through the absorbing tower and the recycling tower, and a condenser that is connected to the recycling tower and condenses an acid gas produced in the recycling tower, wherein a centrifugal separator that separates the absorbent, using a centrifugal force, is disposed at a lower portion in the absorbing tower.

Abstract: An absorbent for desulfurization of combustion gas is provided. The absorbent includes about 1 to about 16 wt % of potassium carbonate (K2CO3); about 0.1 to about 10 wt % of a promoting agent including hindered cyclic amine, hindered cyclic amine bicarbonate, or a combination thereof; and a balance amount of water. In addition, a method of treating the combustion gas using the absorbent is provided.

Abstract: The present invention provides a photocatalytic reactor and a method for treating gaseous pollutants using the same, which can decompose and remove gaseous pollutants such as volatile organic compounds (VOCs), odors, etc. as well as liquid pollutants using an environmentally friendly photocatalytic reaction. To this end, the present invention provides a photocatalytic reactor including: a solution tank to which a fluid containing gaseous pollutants to be treated is supplied through an inlet; a solution injector installed at the top of the inlet and injecting a gaseous pollutant solution into the fluid to be treated such that the gaseous pollutants of the fluid are dissolved; and a liquid photocatalytic treatment device receiving the gaseous pollutant solution, in which the gaseous pollutants of the fluid are dissolved and liquefied, from the solution tank and decomposing the liquefied gaseous pollutants of the fluid.

Abstract: The present invention provides a method of reducing greenhouse gases by capturing and storing carbon dioxide in the form of a biomass, which may be converted into a high value material such as, for example, an oil having more than 37% of omega-3, biodiesel, phospholipid, glycerin, glucose, and a protein feed.

Abstract: Disclosed herein is a light-responsive photocatalyst composition, which is a composite oxide semiconductor containing tungsten, and which can efficiently absorb visible light emitted from the sun and light emitted from interior lamps, such as fluorescent lamps, etc., and a method of preparing the light-responsive photocatalyst composition. The visible light-responsive photocatalyst composition can decompose volatile organic compounds or harmful organic matter causing sick house syndrome, even indoors, because it can be activated by visible light outdoors and can respond to light emitted from interior lamps, such as fluorescent lamps, etc.

Abstract: Disclosed is a closed type photo-bio reacting apparatus for microalgae. The apparatus includes a reactor body, a hollow fiber membrane contact unit, a fluid circulating pump, a light source, and an angle adjusting lift. The reactor body cultures the microalgae. The hollow fiber membrane contact unit is disposed in the reactor body and supplies carbon dioxide to culture solution circulating in the reactor body. The fluid circulating pump circulates the culture solution in the reactor body. The light source irradiates light into the reactor body. The angle adjusting lift adjusts an inclination angle of the reactor body according to an irradiation angle of the light source.

Abstract: The present invention provides a photocatalytic reactor and a method for treating gaseous pollutants using the same, which can decompose and remove gaseous pollutants such as volatile organic compounds (VOCs), odors, etc. as well as liquid pollutants using an environmentally friendly photocatalytic reaction. To this end, the present invention provides a photocatalytic reactor including: a solution tank to which a fluid containing gaseous pollutants to be treated is supplied through an inlet; a solution injector installed at the top of the inlet and injecting a gaseous pollutant solution into the fluid to be treated such that the gaseous pollutants of the fluid are dissolved; and a liquid photocatalytic treatment device receiving the gaseous pollutant solution, in which the gaseous pollutants of the fluid are dissolved and liquefied, from the solution tank and decomposing the liquefied gaseous pollutants of the fluid.

Abstract: Disclosed is a high-speed photobioreactor for culturing microalgae using a hollow fiber membrane. More particularly a high-speed photobioreactor for culturing microalgae using a hollow fiber membrane capable of facilitating growth of microalgae and maximizing carbon dioxide fixation by increasing the rate of carbon dioxide saturation in a culture medium. Specifically, a high-speed photobioreactor for culturing microalgae using a hollow fiber membrane includes a reactor main body for culturing microalgae; a hollow fiber membrane module for supplying carbon dioxide into a culture medium in the reactor main body; a culture medium circulation pump for circulating the culture medium; and a defoamer for removing foams produced in the culture medium.

Abstract: Disclosed herein is a light-responsive photocatalyst composition, which is a composite oxide semiconductor containing tungsten, and which can efficiently absorb visible light emitted from the sun and light emitted from interior lamps, such as fluorescent lamps, etc., and a method of preparing the light-responsive photocatalyst composition. The visible light-responsive photocatalyst composition can decompose volatile organic compounds or harmful organic matter causing sick house syndrome, even indoors, because it can be activated by visible light outdoors and can respond to light emitted from interior lamps, such as fluorescent lamps, etc.

Abstract: The present invention relates to a method and system for photocatalytically decomposing organic pollutants using the electromotive force of a solar cell. The present invention provides a method and system for decomposing organic pollutants, which can greatly increase the rate of decomposition of organic pollutants at low cost by combining a photocatalytic organic pollutant decomposition device, capable of decomposing organic pollutants using light energy, with a solar cell, capable of applying an external voltage to the photocatalytic organic pollutant decomposition device using light energy.