A method for separating carbon dioxide from flue gas to generate a high purity CO2 stream.

The present application relates to a functional fiber for adsorbing heavy metal and a method for producing the same, and the functional fiber for adsorbing heavy metal of the present application may have a structure in which thiolated metal nanoparticles are attached to a porous fiber, thereby minimizing the pore clogging of the porous fiber to remarkably improve the adsorption capacity of heavy metal materials, may be prepared by applying the dry technology without liquid impregnation, thereby minimizing the pore clogging of the porous fiber and fundamentally blocking the process wastewater generation, and is easy to implement the roll-to-roll system, so that continuous production is possible and thus productivity may be improved.

The present invention relates to an electrolysis apparatus for collecting a nitrogen compound using ferric-ethylenediaminetetraacetic acid (Fe-EDTA), and more particularly, to an electrolysis apparatus for collecting a nitrogen compound in exhaust gas by supplying electric energy to cause a redox reaction of Fe-EDTA.

The invention relates to a method of reducing carbon dioxide and metal-containing dust and, more particularly, to a method of simultaneously reducing carbon dioxide and metal-containing dust by passing an off-gas, which contains carbon dioxide or carbon dioxide and metal-containing dust, through a reactor in which a sulfur-oxidizing microorganism is grown using carbon dioxide as a carbon source to produce sulfuric acid, and producing metal sulfates (MeSO.sub.4) by reaction of the produced sulfur acid with metal components present in the off-gas.

One of Japan's current environmental problems is the fact that approximately 70% of the world's incinerators for waste disposal are Japanese incinerators. Although problems such as PPM are now being addressed, discharge at the particulate level into the atmosphere still occurs. In addition, harmful substances including residual chlorine remain in residual ash, and there is a limit to the disposal of waste soil by burying. Furthermore, the costs for maintaining the energy required for incineration are enormous. The present invention is capable of solving all of the aforementioned problems, as well as reducing said maintenance costs, and effectively using unwanted substances currently considered waste by recovering, recycling, and regenerating the same.

A flue gas denitration system includes a catalytic reactor accommodating a plurality of catalytic modules, into which a flue gas flows, and a flue gas heater provided on an upstream side of the catalytic reactor in a flow direction of the flue gas. In the flue gas denitration system, switched are a first denitration state in which the flue gas is denitrated by using the plurality of catalytic modules in the catalytic reactor and a second denitration state in which the flue gas is denitrated by using a catalytic module(s) less than those used in the first denitration state while a temperature of the flue gas flowing into the catalytic reactor is made higher than that in the first denitration state by using the flue gas heater. Thus, by making the temperature of the flue gas flowing into the catalytic reactor higher, it is possible to suppress deterioration in denitration performance in the case of using part of the plurality of catalytic modules for denitration.

A catalyst-containing ceramic dust filter for off-gas or exhaust gas cleaning is prepared by a method comprising the steps of making a water-based impregnation slurry, which comprises a catalytically effective amount of at least one catalytically active metal and an oxide support, to form a catalytically active metal oxide support, impregnating the filter substrate with the impregnation slurry, spraying from the inside to control the amount of liquor while leaving the outer few millimeters of the filter wall dry, and drying the impregnated filter. The impregnated filter is preferably dried by using microwave energy.

An exhaust gas purification device includes an exhaust gas discharge unit having an exhaust gas passage, and a plurality of smoke purifying units. Each smoke purifying unit includes a smoke purifying module disposed outside of the exhaust gas discharge unit and including an elongated smoke purifying holder defining a channel, and at least one water spray pipe for spraying water into the channel. An exhaust gas capture module includes a first exhaust gas capture pipe communicating the exhaust gas passage with the channel and having a first smoke trap extending into the exhaust gas passage.

A waste gas purification system according to an embodiment includes an adsorption-catalysis-oxidation unit, an enhanced absorption unit, an air inducing unit, and a flue gas discharge and heat exchange unit that are sequentially connected. The waste gas enters a heat exchange device of the flue gas discharge and heat exchange unit through a first waste gas delivery pipeline to perform heat exchange, then is converged with waste gas in a second waste gas delivery pipeline, and enters a third waste gas delivery pipeline. Waste gas in the third waste gas delivery pipeline is purified after sequentially passing through the adsorption-catalysis-oxidation unit and the enhanced absorption unit. Purified flue gas is introduced into the flue gas discharge and heat exchange unit by the air inducing unit, and the purified flue gas is discharged after performing heat exchange with the heat exchange device. In some embodiments, the waste gas purification system and method may implement deep treatment of complex waste gas containing organic and inorganic components.

Systems and methods use oxygen uncoupling metal oxide material for decomposition of NO.sub.x. A gaseous input stream comprising NO.sub.x is contacted with a metal oxide particle, generating nitrogen (N.sub.2) gas and an oxidized metal oxide particle. After contacting the first gaseous input stream with the metal oxide particle, a first gaseous product stream is collected. The first gaseous product stream includes substantially no NO.sub.x. A second gaseous input stream comprising at least one sweeping gas is also contacted with the oxidized metal oxide particle. After contacting the oxidized metal oxide particle, the sweeping gas includes oxygen (O.sub.2) and a reduced metal oxide particle is generated. Then a second gaseous product stream is collected, where the second gaseous product stream includes oxygen (O.sub.2) gas.