Abstract: A method of manufacturing treatment equipment (1) of VOC gases, the treatment equipment manufactured by this method and the use of such treatment equipment. In the manufacturing method, the treatment equipment (1) has attached thereto at least one gas distributor portion (5) and at least two gas distributing valves (5V) for alternately distributing the gas to be supplied to regenerative heat exchangers (2H, 3H), and the gas distributor portion (5) has further attached thereto at least one by-pass portion (7) that includes at least one by-pass control valve (7V), and the gas removal portion (6) has attached thereto an exhaust control valve (6V) for controlling the gas removal for directing the gas flow to the removal portion (6) and/or the by-pass portion (7), and the by-pass portion (7) and/or the removal portion (6) have attached thereto the post-exhaust catalyser (8) of VOC gases.

Abstract: A method of converting nitrogen oxides in a gas to nitrogen by contacting the nitrogen oxides with a nitrogenous reducing agent in the presence of a zeolite catalyst containing at least one transition metal, wherein the zeolite is a small pore zeolite containing a maximum ring size of eight tetrahedral atoms, wherein the at least one transition metal is selected from the group consisting of Cr, Mn, Fe, Co, Ce, Ni, Cu, Zn, Ga, Mo, Ru, Rh, Pd, Ag, In, Sn, Re, Ir and Pt.

Abstract: A method of converting nitrogen oxides in a gas to nitrogen by contacting the nitrogen oxides with a nitrogenous reducing agent in the presence of a zeolite catalyst containing at least one transition metal, wherein the zeolite is a small pore zeolite containing a maximum ring size of eight tetrahedral atoms, wherein the at least one transition metal is selected from the group consisting of Cr, Mn, Fe, Co, Ce, Ni, Cu, Zn, Ga, Mo, Ru, Rh, Pd, Ag, In, Sn, Re, Ir and Pt.

Abstract: A method of converting nitrogen oxides in a gas to nitrogen by contacting the nitrogen oxides with a nitrogenous reducing agent in the presence of a zeolite catalyst containing at least one transition metal, wherein the zeolite is a small pore zeolite containing a maximum ring size of eight tetrahedral atoms, wherein the at least one transition metal is selected from the group consisting of Cr, Mn, Fe, Co, Ce, Ni, Cu, Zn, Ga, Mo, Ru, Rh, Pd, Ag, In, Sn, Re, Jr and Pt.

Abstract: A method of converting nitrogen oxides in a gas to nitrogen by contacting the nitrogen oxides with a nitrogenous reducing agent in the presence of a zeolite catalyst containing at least one transition metal, wherein the zeolite is a small pore zeolite containing a maximum ring size of eight tetrahedral atoms, wherein the at least one transition metal is selected from the group consisting of Cr, Mn, Fe, Co, Ce, Ni, Cu, Zn, Ga, Mo, Ru, Rh, Pd, Ag, In, Sn, Re, Ir and Pt.

Abstract: The invention provides a system for regenerative selective catalytic reduction including a catalyst chamber that contains a catalyst for reducing NOX in a gas stream passing therethrough. The system also includes a reactant injector, first and second heat exchangers, and a valve manifold adapted to direct a substantially continuous gas stream through the heat exchangers and catalyst chamber in such a manner as to flow through the catalyst chamber in the same flow direction during each cycle of the system. The invention also provides a process of regenerative selective catalytic reduction wherein the gas stream through the catalyst chamber flows in the same flow direction during each cycle of the process.

Abstract: A particulate filter may include a first layer composed of a first hydrocarbon trap absorbing hydrocarbon contained in an exhaust gas at a low temperature and a second layer composed of a first oxidizing catalyst oxidizing the hydrocarbon contained in the exhaust gas. The hydrocarbon absorbed at the first layer may be released at a high temperature, and the released hydrocarbon may be oxidized at the second layer to raise a temperature of the exhaust gas. An exhaust system may include an oxidation catalyst and the particulate filter. The oxidation catalyst may be a diesel oxidation catalyst comprising a third layer composed of a second hydrocarbon trap absorbing the hydrocarbon contained in the exhaust gas at a low temperature and a fourth layer composed of a second oxidizing catalyst oxidizing the hydrocarbon contained in the exhaust gas.

Abstract: A system is provided that combines an oxygen enrichment device (OBOGS) for generating oxygen-enriched air with a fuel cell system that includes, but is not limited to a fuel cell for using the oxygen-enriched air as a reaction gas within the fuel cell, as a result of which the output of the fuel cell is improved while the size and weight of the fuel cell remain the same.

Abstract: After adjusting an exhaust gas temperature at an exit of a heat recovery unit (11) of an exhaust gas treating apparatus to not more than a dew point temperature of sulfur trioxide (SO3), a heavy metal adsorbent is supplied from a heavy metal adsorbent supply unit (16) disposed in an exhaust gas at an entrance of a precipitator (4) or an intermediate position within the precipitator (4), and the exhaust gas containing the heavy metal adsorbent is supplied into the precipitator (4). Preferably at this stage, the heavy metal adsorbent is supplied into the exhaust gas at the entrance of the precipitator (4) 0.1 seconds after the exhaust gas temperature at the exit of the heat recovery unit (11) has been adjusted to not more than the dew point temperature of SO3.

Abstract: An internal combustion engine in an engine exhaust passage of which a hydrocarbon feed valve (15) and an exhaust purification catalyst (13) are arranged. If the hydrocarbon feed valve (15) feeds hydrocarbons by a period of within 5 seconds, a reducing intermediate is produced inside the exhaust purification catalyst (13). This reducing intermediate is used for NOX purification processing. At the time of engine operation, the demanded produced amount of the reducing intermediate required for reducing the NOx is calculated. The amount of production of the reducing intermediate is made to become this demanded produced amount by control of the feed amount and feed period of hydrocarbons.

Abstract: A system for reducing nitrogen oxides from an exhaust fluid is provided. The system includes an exhaust source, a hydrocarbon reductant source, a first injector in fluid communication with the hydrocarbon reductant source, where the first injector receives a first hydrocarbon reductant stream from the hydrocarbon reductant source, and expels the first portion of the hydrocarbon reductant stream. The system further includes a first catalyst that receives the exhaust stream and the first hydrocarbon reductant stream, a second injector in fluid communication with the hydrocarbon reductant source, where the second injector receives a second hydrocarbon reductant stream from the hydrocarbon reductant source, and expels the second hydrocarbon reductant stream, and a second catalyst disposed to receive an effluent from the first catalyst and the second portion of the hydrocarbon reductant stream.

Abstract: A method of heating a used absorption liquid resulting from a carbon dioxide absorption stage in which a CO2 comprising gas stream is contacted with an absorption liquid comprising ammonia, wherein the used absorption liquid is subjected to heat exchange, in a heat exchanger, with a fluid of a desulfurization stage in which a SO2 comprising flue gas is contacted with a reagent composition comprising an alkaline compound.

Abstract: Carbon dioxide-containing feed stream such as flue gas is treated to produce a high-purity carbon dioxide stream by a series of steps including removing SOx and NOx with activated carbon, carrying out subambient-temperature processing to produce a product stream and a vent stream, and treating the vent stream by pressure swing adsorption or by physical or chemical absorption to produce a product stream which is recycled to the feed stream.

Abstract: Provided are methods for sequestering carbon dioxide. A recovery method and system for recovering a gaseous component is provided. Methods and systems may utilize one or more absorbing solutions in two or more absorbing zones. Methods for reducing the volume of an absorbing system are described. Methods for adjusting the composition of sequestered carbon dioxide are provided.

Abstract: The invention relates to a method for depleting nitrogen oxides from an oxygen-containing gas stream. The gas stream is brought into contact with a scrubbing solution containing ammonia and ammonium sulphite in a NO2 reduction, whereby NO2 is reduced to N2. NO is reacted with ammonia and oxygen to form ammonium nitrite in an NO elimination step which proceeds at elevated pressure. Likewise, the invention also relates a plant for operating the method according to the invention.

Abstract: After absorbing oxygen together with carbon dioxide in an absorber 103, absorbing liquid 104a is supplied to oxygen collecting units 13 and 14. The oxygen collecting units 13 and 14 include silver to collect the oxygen in the absorbing liquid 104a and eliminate the oxygen from the absorbing liquid 104a. A regenerating unit 15 separates and recovers the oxygen collected in one of the two oxygen collecting units 13 and 14 to regenerate the oxygen collecting unit when the other oxygen collecting unit is supplied with the absorbing liquid 104a. A continuous operation can be achieved by switching and using the two oxygen collecting units 13 and 14.

Abstract: Systems and process for volatile degradation removal from amine plant wash water are provided. The systems and processes include a separation device disposed within a water circulation loop and configured to continuously remove at least a portion of the volatile degradation products from the wash solutions. The separation device can be configured for stripping, distillation, and/or extraction of the volatile degradation products from at least a fraction of the spent wash water. Optionally, a chemical agent can be reacted with the volatile degradation products to form heat stable salts for subsequent removal.

Abstract: A method of using a catalyst comprises exposing a catalyst to at least one reactant in a chemical process. The catalyst comprises copper and a small pore molecular sieve having a maximum ring size of eight tetrahedral atoms. The chemical process undergoes at least one period of exposure to a reducing atmosphere. The catalyst has an initial activity and the catalyst has a final activity after the at least one period of exposure to the reducing atmosphere. The final activity is within 30% of the initial activity at a temperature between 200 and 500° C.

Abstract: Provided are catalyst articles, emission treatment systems and methods for simultaneously remediating the carbon monoxide, nitrogen oxides (NOx), particulate matter, and gaseous hydrocarbons present in diesel engine exhaust streams. The emission treatment system of specific embodiment effectively treats diesel engine exhaust with a single catalyst article.

Abstract: Aspects of the present invention relates to a copper containing Levyne molecular sieve having a silica to alumina mole ratio less than 30 and a Cu:Al atomic ratio less than 0.45, wherein the Levyne molecular sieve retains at least 60% of its surface area after exposure to a temperature of from about 750° C. to about 950° C. in the present of up to 10 volume percent water vapor for a time ranging from about 1 to about 48 hours.

Abstract: A method for separating carbon dioxide (CO2) from a gas stream is provided. The method includes reacting at least a portion of CO2 in the gas stream with a plurality of liquid sorbent particles to form a plurality of solid adduct particles and a first CO2-lean gas stream; the solid adduct particles entrained in the first CO2-lean gas stream to form an entrained gas stream. The method includes separating at least a portion of the plurality of solid adduct particles from the entrained gas stream in a separation unit to form an adduct stream and a second CO2-lean gas stream. The method further includes heating at least a portion of the adduct stream in a desorption unit to form a CO2 stream and a regenerated liquid sorbent stream. A system for separating CO2 from a gas stream is also provided.

Abstract: An embodiment of a method for recovering nitric acid from acid pickling solution includes introducing a treating material comprising at least one chemical into a pickling solution comprising free nitric acid. The treating material reacts with at least a portion of the free nitric acid in the pickling solution and produces NOx. A gas stream comprising at least a portion of the NOx is contacted with ozone, thereby forming oxidation products including nitrogen sesquioxide and nitrogen pentoxide. At least a portion of the nitrogen sesquioxide and nitrogen pentoxide is contacted with water, thereby forming nitric acid, and at least a portion of the nitric acid is collected.

Abstract: A multi-stage UCSRP process and system for removal of sulfur from a gaseous stream in which the gaseous stream, which contains a first amount of H2S, is provided to a first stage UCSRP reactor vessel operating in an excess SO2 mode at a first amount of SO2, producing an effluent gas having a reduced amount of SO2, and in which the effluent gas is provided to a second stage UCSRP reactor vessel operating in an excess H2S mode, producing a product gas having an amount of H2S less than said first amount of H2S.

Abstract: A system and method for removing pollutants and greenhouse gases SO2, NO2, and CO2 from a flue gas stream, includes: a) contacting natural seawater with a flue gas for a given period of time to remove SO2 from the flue gas; b) contacting treated alkaline water to the flue gas to remove CO2 and NOx from the flue gas and generate oxygen and carbon particles; and c) collecting or emitting the flue gas after step b). The method and the system of the invention are significantly more economical and convenient and do not cause harm to the environments. The invention also exhibits a novel and unique feature that elemental carbon and oxygen are generated as final products and can be recovered as an energy source.

Abstract: An arrangement for aftertreatment of exhaust gas for lean-burn internal combustion engines such as diesel engines and Otto engines with direct injection has a NOx storage catalyzer installed in the exhaust gas train for reducing nitrogen oxides and at which nitrogen oxides are stored in lean operating phases and these stored nitrogen oxides are reduced in rich operating phases. At least one molecular sieve which keeps sulfur dioxide away from the at least one NOx storage catalyzer is arranged upstream of the NOx storage catalyzer.

Abstract: A particle separator and method for removing particles from an exhaust gas stream of an internal combustion engine. A prescribed number of flow cells are formed in the particle separator. The exhaust gas stream flows into and/or out of the flow cells via, as viewed in a main direction of flow of the exhaust gas stream, side wall regions of the flow cells. At least one storage space is formed in the flow cells for storing particles removed from the exhaust gas stream, which flows through at least portions of the particle separator.

Abstract: The present disclosure relates to a gas cleaning A process for cleaning a gas stream containing carbon dioxide and sulfur dioxide, including removal of carbon dioxide from the gas stream in a carbon dioxide removal stage; the process comprising a) removing, in a sulfur removal stage, sulfur dioxide from the gas stream by bringing the gas stream into direct contact with a liquid comprising ammonia, to absorb into the liquid sulfur dioxide from the gas stream such that the gas stream is depleted in sulfur dioxide; b) cooling, in a gas cooling stage, the gas stream such that a cooled gas stream is formed; c) removing, in the carbon dioxide removal stage, carbon dioxide from the cooled gas stream depleted in sulfur dioxide by bringing the gas stream into contact with ammoniated liquid to absorb into the liquid carbon dioxide from the gas stream such that the gas stream is depleted in carbon dioxide and enriched in ammonia; d) removing, in an ammonia removal stage, ammonia from the gas stream depleted in carbon di

Abstract: The air pollution control device includes: NH4Cl solution supply means 16 for spraying an NH4Cl solution 14 by a plurality of spray nozzles 15 into a flue gas duct 13 at the downstream of the boiler 11; a reduction-denitration device 18 including a denitration catalyst for reducing NOx in the flue gas 12 with NH3 and for oxidizing Hg under the coexistence with HCl; and a wet desulfurization device 22 for reducing the amount of Hg oxidized in the reduction-denitration device 18 by using a limestone-gypsum slurry 21. The NH4Cl solution supply means 16 supplies the NH4Cl solution 14 from the spray nozzles 15 so as to prevent the NH4Cl solution 14 from being adhered to an inner wall of the flue gas duct 13 through which the flue gas 12 is flowing.

Abstract: A system for treating an exhaust stream issued by a power plant processes the exhaust stream in a methanol reactor. The exhaust stream contains CO and/or CO2, and can be a full stack or a partial stack exhaust stream. The methanol reactor is a pellet style of methanol reactor, and can be a foam or an alpha alumina oxide foam reactor. A plasma chamber generates H2 for reacting in the methanol reactor. A portion of the exhaust stream issued by the power plant is consumed in the plasma chamber. An algae reactor converts sequestered CO2 to O2. The algae is exposed to the exhaust stream to extract nutrients therefrom and thereby augment growth of the algae. The plasma chamber receives at a high temperature region thereof CO that is reduced to its elemental state. Cooling of the exhaust stream and precipitates the methanol to be re-burned as a fuel.

Abstract: A flue-gas purification system includes a flue-gas cycling system, a reactor, and an absorbent adding system having at least a catalytic absorbent, wherein the catalytic absorbent is being gasified for reacting with the flue-gas in the reactor in a homogenous gas-gas phase reacting manner. Therefore, the purification system has fast reaction rate between the pollutants of the flue-gas and the catalytic absorbent, which is preferably ammonia, to efficiently remove pollutants, so as to effectively purify the flue-gas.

Abstract: A method and a device for increasing the temperature of an exhaust gas or process gas with an oxidizable share, in particular a carbon monoxide-containing nitrogen oxide flue gas, before a catalytic flue gas denitrification is performed, wherein an exhaust gas or flue gas duct is in communication with at least one hot gas duct designed as a combustion chamber which hot gas duct is assigned with a combustion device, so that the oxidizable share, in particular the carbon monoxide share, of the exhaust gas or flue gas conducted through the hot gas duct is oxidized at least partially in particular to carbon dioxide.

Abstract: The present invention is a method for selective reduction of nitrogen oxides in a gas stream with ammonia wherein the ammonia is vaporized prior to contacting it with the carrying fluid. The present invention also comprises a reducing agent dispersion system for use in substantially uniformly mixing a reducing agent with nitrogen oxides in a flue gas stream comprising a header and a plurality of lances. Further, the present invention comprises a novel reactor design for use in selective reduction of nitrogen oxides in a gas stream.

Abstract: Carbon dioxide-containing feed stream such as flue gas is treated to produce a high-purity carbon dioxide stream by a series of steps including removing SOx and NOx with activated carbon, carrying out subambient-temperature processing to produce a product stream and a vent stream, and treating the vent stream by pressure swing adsorption or by physical or chemical absorption to produce a product stream which is recycled to the feed stream.

Abstract: A feed gas comprising CO2, H2S and H2 is treated to produce an H2-enriched product and a CO2 product. The feed gas is separated by pressure swing adsorption to provide a stream of the H2-enriched product, and two streams of sour gas depleted in H2 and enriched in H2S and CO2 relative to the feed gas. One of the streams of sour gas is processed in an H2S to elemental sulfur conversion system, in which H2S in the sour gas is converted to elemental sulfur order to obtain a stream of sweetened gas, from which the CO2 product is formed. The other of said streams of sour gas is processed in an oxidation system, in which H2S in the sour gas is oxidized to SOx(SO2 and SO3) which is introduced into the H2S to elemental sulfur conversion system.

Abstract: In at least part of a catalyst layer of a particulate filter, a second catalyst part is exposed on the surface of the catalyst layer to overlie a first catalyst part, the first catalyst part contains Pt-carried activated alumina particles, the second catalyst part contains ZrNd-based mixed oxide particles containing a rare earth metal M and at least one of the first catalyst part and the second catalyst part further contains CeZr-based mixed oxide particles containing a rare earth metal R.

Abstract: Combustion flue gas containing NOX and SOX is treated to remove NOX in a multistep system in which NOx is reduced in the flue gas stream via selective catalytic reduction or selective non-catalytic reduction with ammonia or an ammonia-forming compound, followed treatment with hydrogen peroxide to remove residual ammonia and, optionally, treatment with an alkali reagent to reduce residual NOX in the flue gas stream. The NOX-depleted flue gas stream may also be subjected to a desulfurization treatment for removal of SOX.

Abstract: A method for purifying waste gases of an at least partially burnt solid fuel to reduce pollutants such as SOx and/or HCl and NOx. The waste gas flows into a moving bed reactor from below through a lower and upper layer of an adsorption and/or absorption agent already polluted with NOx, SOx and/or HCl. SOx and/or HCl components are adsorbed from the waste gas into the NOx loaded adsorption and/or absorption agent. Thereafter, the waste gas is mixed with an ammonium-containing compound and flows through an upper horizontal gas inflow and bulk material removal tray of the moving bed reactor into the upper layer of the adsorption and/or absorption agent already polluted with NOx and small quantities of SOx and/or HCl. During the throughflow of the upper layer, NOx components are adsorbed from the waste gas onto the adsorption/absorption agent.

Abstract: The invention relates to a plate (10a) intended to be integrated in a stack of plates in a heat exchanger system, the plate comprising a plurality of channels (38) distributed in rows (40), each row comprising side walls (42) arranged opposite one another and spaced apart from one another in a first direction (44), so that two directly consecutive side walls delimit one of the channels (38), the rows being arranged opposite one another and spaced apart from one another in a second direction (46) which is perpendicular to the first. Furthermore, in the fluid circulation zone (20) of the plate incorporating the channels (38), only the latter are coated with a catalyst allowing a chemical reaction.

Abstract: An air pollution control device is an air pollution control device for reducing the amounts of NOx and Hg contained in flue gas 12 from a boiler 11. The air pollution control device includes: NH4Cl solution supply means 16 for spraying an NH4Cl solution 14 by a spray nozzle 15 into a flue gas duct 13 at the downstream of the boiler 11; a mixer 17 provided on the downstream side of a region where NH4Cl is gasified, for promoting mixing, with the flue gas 12, HCl and NH3 which are generated when NH4Cl is gasified; a reduction-denitration device 18 including a denitration catalyst for reducing NOx in the flue gas 12 with NH3 and for oxidizing Hg under the coexistence with HCl; and a wet desulfurization device 22 for reducing the amount of Hg oxidized in the reduction-denitration device 18 using a limestone-gypsum slurry 21.

Abstract: Disclosed herein is a layered, three-way conversion catalyst having the capability of simultaneously catalyzing the oxidation of hydrocarbons and carbon monoxide and the reduction of nitrogen oxides being separated in a front and rear portion is disclosed. Provided is a catalytic material of at least two front and two rear layers in conjunction with a substrate, where each of the layers includes a support, all layers comprise a platinum group metal component, and the rear bottom layer is substantially free of a ceria-containing oxygen storage component (OSC).

Abstract: A system for removing CO, H2 and CH4 from an anode waste gas stream from a fuel cell is disclosed. The two catalyst system may comprise a platinum/palladium catalyst and a copper/manganese catalyst. The anode waste stream comes in contact with the platinum/palladium catalyst prior to contacting the copper/manganese catalyst.

Abstract: A silicon oxide removal apparatus for removing silicon oxide contained in an inert gas discharged from a silicon single crystal manufacturing apparatus, including at least: a contact means for bringing the inert gas discharged from the silicon single crystal manufacturing apparatus into contact with a strongly alkaline solution; and a neutralizing means for neutralizing an alkaline material contained in the inert gas brought into contact with the strongly alkaline solution. As a result, there is provided a silicon oxide removal apparatus and a facility for recycling an inert gas for use in a silicon single crystal manufacturing apparatus that can more effectively remove the silicon oxide contained in the inert gas discharged from the silicon single crystal manufacturing apparatus at low cost and enable recycle of the inert gas in which the silicon oxide has been effectively removed.

Abstract: A system for reducing nitrogen oxides from an exhaust fluid is provided. The system includes an exhaust source, a hydrocarbon reductant source, a first injector in fluid communication with the hydrocarbon reductant source, where the first injector receives a first hydrocarbon reductant stream from the hydrocarbon reductant source, and expels the first portion of the hydrocarbon reductant stream. The system further includes a first catalyst that receives the exhaust stream and the first hydrocarbon reductant stream, a second injector in fluid communication with the hydrocarbon reductant source, where the second injector receives a second hydrocarbon reductant stream from the hydrocarbon reductant source, and expels the second hydrocarbon reductant stream, and a second catalyst disposed to receive an effluent from the first catalyst and the second portion of the hydrocarbon reductant stream.

Abstract: Method for SOx remediation in a manufacturing operation includes providing a process stream including an organic compound and an amount of a sulfur-containing compound, an oxidation stream including at least one chemical oxidant, and combining at least a portion of the oxidant stream with at least a portion of the process stream to obtain an organic stripper feed stream, in which the amount of the sulfur-containing compound is reduced upon reaction with the at least one chemical oxidant. The method can further include directing at least a portion of the organic stripper feed stream to a combustion operation, and emitting a SOx remediated off gas from the combustion operation. A system using the disclosed method also is provided.

Abstract: An air pollution control system includes an emission treatment system configured to receive flue gas, to reduce at least one pollutant therefrom, and to output emission treated flue gas. A first air heater in fluid communication with the emission treatment system includes a heat exchanger for heating forced air introduced thereto above a base temperature and thereby cooling emission treated flue gas from the emission treatment system to a stack discharge temperature. A second air heater in fluid communication with the first air heater to receive heated forced air therefrom includes a heat exchanger for heating forced air introduced thereto to a preheat temperature for combustion in a boiler and thereby cooling flue gas introduced from a boiler to the second air heater to an emission treatment temperature. The second air heater is in fluid communication with the emission treatment system to introduce cooled flue gas thereto.

Abstract: A pre-catalyst device configured to be disposed upstream of a main aftertreatment device of an engine exhaust system. An oxidizing material is disposed on an inlet face of the pre-catalyst device, where the oxidizing material is configured to oxidize engine exhaust before the engine exhaust reaches the main aftertreatment device of the engine exhaust system.

Abstract: An exhaust gas dry treatment device comprises an adsorption tower having: a box-shaped tower body; a plurality of reaction chambers have moving beds therein; a plurality of vertical partition plates which sequentially close between the end parts of the plurality of reaction chambers and between the end parts of the reaction chambers and the inner wall of the tower; an exhaust gas supply port allowing the inside of an inlet side wind box space which is formed in the tower body between the front tower wall and the reaction chamber end part to communicate with the inside of an exhaust gas supply duct; and an exhaust gas discharge port allowing the inside of an outlet side wind box space which is formed in the tower body between the rear tower wall and the reaction chamber end part to communicate with the inside of an exhaust gas discharge duct.

Abstract: The invention provides a system for regenerative selective catalytic reduction including a catalyst chamber that contains a catalyst for reducing NOX in a gas stream passing therethrough. The system also includes a reactant injector, first and second heat exchangers, and a valve manifold adapted to direct a substantially continuous gas stream through the heat exchangers and catalyst chamber in such a manner as to flow through the catalyst chamber in the same flow direction during each cycle of the system. The invention also provides a process of regenerative selective catalytic reduction wherein the gas stream through the catalyst chamber flows in the same flow direction during each cycle of the process.

Abstract: A selective reduction catalyst includes a catalyst support in which a plurality of through holes partitioned by porous walls are formed in parallel with each other and an active component having a catalytic action and carried by the walls. Inlet portions and outlet portions, adjacent to each other, of the through holes are alternately sealed, and the wall carrying the active component is formed so that a particle-state solid matter ammonium nitrate cannot pass through it. The exhaust gas purifier includes the selective reduction catalyst, a liquid injection nozzle which is provided on the upstream side and can inject urea liquid toward the catalyst, a diesel particulate filter provided at an exhaust pipe on the upstream side, and filter temperature raising means capable of raising the temperature of the diesel particulate filter to a predetermined value or above.

Abstract: A system for reducing ammonia (NH3) emissions includes (a) a first component comprising a first substrate containing a three-way catalyst, wherein the first component is disposed upstream of a second component comprising a second substrate containing an ammonia oxidation catalyst, wherein said ammonia oxidation catalyst comprises a small pore molecular sieve supporting at least one transition metal; and (b) an oxygen-containing gas input disposed between the components. For example, a CHA Framework Type small pore molecular sieve may be used. A method for reducing NH3 emission includes introducing an oxygen-containing gas into a gas stream to produce an oxygenated gas stream; and exposing the oxygenated gas stream to an NH3 oxidation catalyst to selectively oxidize at least a portion of the NH3 to N2.