Abstract: Disclosed is an apparatus for decomposing low-concentration volatile organic compounds, which includes: an adsorption unit configured to adsorb a volatile organic compound; a heated air supply unit configured to supply a heated air to the adsorption unit; an oxidation decomposing catalyst unit configured to decompose a volatile organic compound detached from the adsorption unit; and an ozone supply unit configured to supply an ozone to the oxidation decomposing catalyst unit. The apparatus may maximize an exchange cycle semi-permanently by adsorbing low-concentration VOC under a high-flow condition and then detaching VOC within a short time and also by recycling an adsorption filter. In addition, the apparatus may effectively decompose VOC substances detached by a low flow into carbon dioxide and water under a condition with most excellent oxidation decomposition efficiency by using an oxidation decomposing catalyst filter.

Abstract: Provided are a reusable polymeric material for removing siloxane compounds in biogas, a method for removing siloxane using the same, and an apparatus therefor, and more particularly, a polyacrylate-based polymer absorbent for removing siloxane compounds in biogas and a method for removing siloxane compounds in biogas. The method for removing siloxane compounds in biogas includes (a) providing the biogas, and b) absorbing the siloxane compounds in a polymer absorbent by passing the biogas through the polymer absorbent according to any one of claims 1 to 5.

Abstract: Disclosed is a catalyst filter, which includes a catalyst support and a nano metallic catalyst sprayed to a surface of the catalyst support. The catalyst filter uses catalyst slurry prepared by using a particulate catalyst, in which a small amount of nano metallic catalyst exhibiting a catalyst performance is sprayed to a surface of the catalyst support, different from an existing patent technique in which catalyst particles are formed and prepared as a support to consume a large amount of catalyst. Therefore, the specific surface area of the catalyst filter is not smaller than the specific surface area of the nano catalyst particles, and thus the catalyst filter may effectively remove and decompose ultra-low concentration gas-state contaminants in an indoor air.

Abstract: Provided are a reusable polymeric material for removing siloxane compounds in biogas, a method for removing siloxane using the same, and an apparatus therefor, and more particularly, a polyacrylate-based polymer absorbent for removing siloxane compounds in biogas and a method for removing siloxane compounds in biogas. The method for removing siloxane compounds in biogas includes (a) providing the biogas, and b) absorbing the siloxane compounds in a polymer absorbent by passing the biogas through the polymer absorbent according to any one of claims 1 to 5.

Abstract: Disclosed is an apparatus for decomposing low-concentration volatile organic compounds, which includes: an adsorption unit configured to adsorb a volatile organic compound; a heated air supply unit configured to supply a heated air to the adsorption unit; an oxidation decomposing catalyst unit configured to decompose a volatile organic compound detached from the adsorption unit; and an ozone supply unit configured to supply an ozone to the oxidation decomposing catalyst unit. The apparatus may maximize an exchange cycle semi-permanently by adsorbing low-concentration VOC under a high-flow condition and then detaching VOC within a short time and also by recycling an adsorption filter. In addition, the apparatus may effectively decompose VOC substances detached by a low flow into carbon dioxide and water under a condition with most excellent oxidation decomposition efficiency by using an oxidation decomposing catalyst filter.

Abstract: Disclosed is a catalyst filter, which includes a catalyst support and a nano metallic catalyst sprayed to a surface of the catalyst support. The catalyst filter uses catalyst slurry prepared by using a particulate catalyst, in which a small amount of nano metallic catalyst exhibiting a catalyst performance is sprayed to a surface of the catalyst support, different from an existing patent technique in which catalyst particles are formed and prepared as a support to consume a large amount of catalyst. Therefore, the specific surface area of the catalyst filter is not smaller than the specific surface area of the nano catalyst particles, and thus the catalyst filter may effectively remove and decompose ultra-low concentration gas-state contaminants in an indoor air.

Abstract: Provided is a method for preparing a vanadia-titania catalyst, comprising: vaporizing a titanium precursor; conveying the vaporized titanium precursor to a reaction unit together with an oxygen supplying source; reacting the vaporized titanium precursor conveyed to the reaction unit with the oxygen supplying source to produce titania particles; condensing the titania particles, collecting and recovering them; mixing the recovered titania particles with a vanadium precursor solution; drying the mixture of the titania particles with the vanadium precursor solution; and calcining the dried mixture under oxygen atmosphere or air. Provided also is a vanadia-titania catalyst obtained by the method. The vanadia-titania catalyst has a large specific surface area, uniform and fine nano-scaled size, and high dispersibility, thereby providing excellent nitrogen oxide removal efficiency, particularly in a low temperature range of 200° C.-250° C.

Abstract: Disclosed is an apparatus and method for decomposing an ultra-low concentration of volatile organic compounds, which may effectively remove ultra-low concentration of volatile organic compounds by a batch process for separating ultra-low concentration of volatile organic compounds present in an indoor air or the like and oxidizing the corresponding volatile organic compounds at a low temperature.

Abstract: Disclosed are an apparatus and a method for manufacturing composite nanoparticles. The apparatus comprises: a first precursor supply unit vaporizing a first precursor and supplying it to a reaction unit; a second precursor supply unit vaporizing a second precursor and supplying it to the reaction unit; the reaction unit producing composite nanoparticles by reacting the vaporized first precursor with the vaporized second precursor; an oxygen supply line supplying an oxygen source to the reaction unit; and a collection unit collecting the composite nanoparticles produced by the reaction unit. Since gas phase synthesis occurs in different stages using the U-shaped reaction chamber, aggregation is prevented and composite nanoparticles of uniform size and high specific surface area can be produced easily.

Abstract: Provided are an apparatus and method for preparing a silica-titania catalyst. The apparatus for preparing a silica-titania catalyst, comprising: precursor supplying units; an oxygen supplying line; a reaction unit; and a recovering unit, wherein the precursor supplying units vaporize a silica precursor and titania precursor and supply them to the reaction unit, wherein the oxygen supplying line supplies an oxygen source to the reaction unit, wherein the reaction unit converts vaporizates of the silica precursor and titania precursor supplied from the precursor supplying units to produce a silica-titania catalyst, wherein the recovering unit cools, condenses and collects the silica-titania catalyst produced at the reaction unit, wherein the recovering unit comprises a cooler for cooling the silica-titania catalyst introduced from the reaction unit, and the cooler comprises a turbulence-forming section on a flow path of the silica-titania catalyst.

Abstract: Provided is a method for preparing a vanadia-titania catalyst, comprising: vaporizing a titanium precursor; conveying the vaporized titanium precursor to a reaction unit together with an oxygen supplying source; reacting the vaporized titanium precursor conveyed to the reaction unit with the oxygen supplying source to produce titania particles; condensing the titania particles, collecting and recovering them; mixing the recovered titania particles with a vanadium precursor solution; drying the mixture of the titania particles with the vanadium precursor solution; and calcining the dried mixture under oxygen atmosphere or air. Provided also is a vanadia-titania catalyst obtained by the method. In the vanadia-titania catalyst, titania particles (carriers) are prepared by chemical vapor condensation, and then vanadia is supported on the titania particles (carriers) through impregnation and calcining.

Abstract: Provided are a titania carrier for supporting a catalyst for removing nitrogen oxides, a manganese oxide-titania catalyst comprising the same, an apparatus and a method for preparing the same, and a method for removing nitrogen oxides. More particularly, provided are a titania carrier having a specific surface area of 100 m2/g-150 m2/g, an average pore volume of 0.1 cm3/g-0.2 cm3/g, and an average particle size of 5 nm-20 nm, and an apparatus and method for preparing the same. Provided also are a manganese oxide-titania catalyst comprising the titania carrier and manganese oxide supported thereon, a method for preparing the same, and a method for removing nitrogen oxides using the catalyst. The catalyst has high activity and dispersibility, and thus provides excellent denitrogenation efficiency even in a low temperature range of about 200° C.

Abstract: Disclosed are an apparatus and a method for manufacturing composite nanoparticles. The apparatus comprises: a first precursor supply unit vaporizing a first precursor and supplying it to a reaction unit; a second precursor supply unit vaporizing a second precursor and supplying it to the reaction unit; the reaction unit producing composite nanoparticles by reacting the vaporized first precursor with the vaporized second precursor; an oxygen supply line supplying an oxygen source to the reaction unit; and a collection unit collecting the composite nanoparticles produced by the reaction unit. Since gas phase synthesis occurs in different stages using the U-shaped reaction chamber, aggregation is prevented and composite nanoparticles of uniform size and high specific surface area can be produced easily.

Abstract: The present disclosure relates to a fire grate type incineration apparatus, which includes movable fire grates and fixed fire grates alternatively arranged in a step pattern and incinerates waste while moving the waste to a discharge hole by the operation of the movable fire grates, wherein a channel is formed in the fixed fire grates so that a coolant cools the fixed fire grates while flowing along the channel, wherein the air introduced into the movable fire grates cools the movable fire grates and then is preheated and supplied into the incineration apparatus through an exhaust hole formed in the movable fire grates.

Abstract: Disclosed are an apparatus and method for preparing a manganese oxide-titania catalyst. The apparatus for preparing a manganese oxide-titania catalyst includes: a vaporizer vaporizing a manganese precursor and a titanium precursor; a carrier gas supply line supplying a carrier gas, which carries precursor vapors vaporized by the vaporizer to a reactor, to the vaporizer; an oxygen supply line supplying an oxygen source to the reactor; the reactor reacting the precursor vapors with the oxygen source to synthesize a manganese oxide-titania catalyst; and a collector condensing and collecting the manganese oxide-titania catalyst synthesized in the reactor.

Abstract: Disclosed are an apparatus and method for preparing a manganese oxide-titania catalyst. The apparatus for preparing a manganese oxide-titania catalyst includes: a vaporizer vaporizing a manganese precursor and a titanium precursor; a carrier gas supply line supplying a carrier gas, which carries precursor vapors vaporized by the vaporizer to a reactor, to the vaporizer; an oxygen supply line supplying an oxygen source to the reactor; the reactor reacting the precursor vapors with the oxygen source to synthesize a manganese oxide-titania catalyst; and a collector condensing and collecting the manganese oxide-titania catalyst synthesized in the reactor.

Abstract: Disclosed is a method for removing volatile organic compounds included in the air, comprising: generating ozone; and treating the ozone with a catalyst to generate reactive species, wherein the volatile organic compounds are decomposed by the reactive species.