Abstract: A honeycomb structure includes at least one honeycomb unit. The at least one honeycomb unit has a plurality of through holes defined by partition walls along a longitudinal direction of the honeycomb unit. The honeycomb unit includes zeolite, an inorganic binder, and a noble metal catalyst. The noble metal catalyst is supported in a region of the honeycomb unit. The region extends from one end portion of the honeycomb unit in the longitudinal direction over approximately 1.5% or more to approximately 20% or less of an overall length of the honeycomb unit in the longitudinal direction.

Abstract: A preferential oxidation reactor for removing carbon monoxide in a hydrogen mixture gas is disclosed. The preferential oxidation reactor may include a housing having a catalytic layer provided therein, a mixture gas supply portion inserted into the interior of the housing and penetrating the catalytic layer, a condensate receiving portion contained within the housing and in fluid communication with a gas outlet port of the mixture gas supply portion and condensate control tubes arranged in the catalytic layer of the housing and in fluid communication with the condensate receiving portion. The condensate control tubes may have a capillary structure. A fuel cell system including the preferential oxidation reactor is also disclosed.

Abstract: A honeycomb structural body includes at least one honeycomb unit including a ? type zeolite, a phosphate group zeolite, and an inorganic binder and having a plurality of through holes divided by partition walls and arranged in a longitudinal direction of the honeycomb unit. The ? type zeolite includes secondary particles having an average particle diameter of approximately 0.5 ?m or more and approximately 5 ?m or less. The phosphate group zeolite includes primary particles having an average particle diameter of approximately 0.5 ?m or more and approximately 5 ?m or less. A ratio of a mass of the phosphate group zeolite with respect to a total mass of the ? type zeolite and the phosphate group zeolite is approximately 5% or more and approximately 35% or less.

Abstract: The present invention relates to a particle filter and a method for operating a particle filter. The particle filter includes at least one filter portion forming an open filter system and also a heatable particle collecting element which is arranged adjacently to this filter portion and comprises a material having temperature-dependent electrical resistance. The method for operating the particle filter includes heating the particle collecting element and measuring the electrical resistance of the particle collecting element to determine whether to regenerate the particle filter.

Abstract: Adsorbent dust can be recovered while spraying is prevented. An apparatus is provided with a desulfurization-denitration tower body and an adsorbent discharging device. An entrance louver and an exit louver are provided for forming a packed moving bed of an adsorbent that moves downward inside the tower body, the apparatus has a throttle portion provided with a side panel that is inclined so that a spacing gradually decreases toward a discharging device, the throttle portion being provided between the tower body and the discharging device, and first partitions are provided inside the throttle portion. A second partition extending along the incline direction of the side panel is provided at a predetermined distance from the bottom end of the exit louver above the side panel, and a gap is provided between the bottom end part of the exit louver and the side panel of the throttle portion.

Abstract: A method for removing matter from a filter is disclosed. The method may include measuring loading conditions of a filter media. The method may also include applying at least one voltage pulse between an electrode external to the filter media and a housing of the filter media to induce a plurality of shock waves directed toward the filter media, based on the loading conditions.

Abstract: Systems and methods for fabricating bodies (e.g., porous bodies) are described. Various aspects provide for reactors and the fabrication of reactors. Some reactors include surfaces that provide for heterogeneous reactions involving a fluid (and/or components thereof). A fluid may be a gas and/or a liquid. A contaminant in the fluid (e.g., a dissolved or suspended substance) may react in a reaction. A contaminant may be filtered from a fluid. Some reactors provide for independent control of heat transfer (between the fluid, the reactor, and the environment) with respect to mass transfer (e.g., fluid flow through the reactor).

Abstract: The invention relates to an adsorber, including a reaction chamber, an adsorbent having adsorption properties enabling the at least partial removal of water from a gas stream including NOx and/or SOx, and a coating essentially consisting of a polymer material on at least a portion of the inner metal wall of the reaction chamber, said polymer being resistant to the acidic liquids at temperatures above 150° C.

Abstract: The invention is to provide a process for producing an aluminum titanate-based ceramics body, wherein, as a regenerated starting material, a fired body recovered in a production process for an aluminum titanate-based ceramics body is used and the aluminum titanate-based ceramics body excellent in a mechanical strength and in a thermal characteristics such as low thermal expansion and heat resistance can be obtained. The invention provides a process for producing an aluminum titanate-based ceramics body using a fired ceramics body recovered in a production process for an aluminum titanate-based ceramics body, comprising the following steps: a step of preparing a pulverized product having a median particle diameter of 100 ?m or less from the fired ceramics body; a step of preparing a regenerated clay containing the pulverized product and water; a step of shaping the regenerated clay to form a shaped body; and a step of firing the shaped body.

Abstract: Disclosed are ceramic bodies comprised of composite cordierite aluminum magnesium titanate ceramic compositions and methods for the manufacture of same.

Abstract: A partial wall-flow filter having some unplugged flow-through channels and some plugged channels. Desirable combinations of filtration efficiency and back pressure may be provided by combinations of t wall?305 urn, MPD?20 ?m, % P?50%, and CD?250 cpsi wherein t wall is the transverse thickness of the porous walls, MPD is a mean pore diameter of the porous walls, % P is the total porosity of the porous walls, and CD is the cell density of the channels. In one embodiment, some of the plugged channels are located adjacent to the inlet end and some are located adjacent to the outlet end. Systems and method including the partial wall-flow filter are also described.

Abstract: A straight through flow filter element is provided in which the seal and/or seal support may be arranged to be generally flush with the flow face of the filter media pack. In some embodiments, long filter media packs may be facilitated. Additionally, certain processing advantages in simplicity of molding a seal on the support can be accomplished.

Abstract: A catalytic converter includes an inlet end, an outlet end and a catalyst body. The inlet end is configured to receive an exhaust gas from an engine. An outlet end is configured to output the exhaust gas. A catalyst body includes partitioning members disposed between the inlet end and the outlet end. The catalyst body includes exhaust channels and fluid channels. The exhaust channels are configured to guide the exhaust gas from the inlet end to the outlet end. The fluid channels are configured to receive a fluid from and return the fluid to a waste heat recovery circuit. Each of the exhaust channels and each of the fluid channels includes a respective ones of the partitioning members.

Abstract: SOx removal equipment for reducing sulfur oxides from flue gas from a boiler, a cooler which is provided on the downstream side of the SOx removal equipment, for reducing the sulfur oxides from the flue gas and for decreasing a gas temperature, CO2 recovery equipment which includes an absorber for bringing CO2 in the flue gas into contact with a CO2 absorption liquid so as to be reduced and a regenerator for causing the CO2 absorption liquid to emit CO2 so as to recover CO2 and regenerate the CO2 absorption liquid, and dissolved salt spraying equipment for reducing a mist generation material which is a generation source of mist that is generated in the absorber of the CO2 recovery equipment before introducing the flue gas to the CO2 recovery equipment, are included.

Abstract: In a method for producing a ceramic filter element for an exhaust gas filter for an internal combustion engine or a catalyst support, a combustible non-ceramic support web is used and holes or recesses are introduced into the non-ceramic support web at defined locations.

Abstract: Diesel oxidation catalysts, catalytic articles, methods of making catalytic articles, emissions treatment systems and methods of treating an exhaust gas stream using the catalytic articles for the treatment of exhaust gas emissions, such as the oxidation of unburned hydrocarbons (HC) and carbon monoxide (CO) are described. Specific catalytic articles comprising a substrate with a first washcoat layer comprising greater than or equal to about 2% by weight palladium dispersed on a ceria support and a second washcoat layer comprising a platinum group metal and a refractory metal oxide are described.

Abstract: A configuration includes two exhaust gas treatment devices disposed in succession in an exhaust gas line. A first exhaust gas treatment device has a first subregion connected through at least one support body to a second subregion of a second exhaust gas treatment device. The support body has opposite ends connected by connections points to respective subregions. At least the second subregion is formed by metallic components that contact one another to form contact surfaces and at most 20% of the area of the contact surfaces have brazed or solder connections and/or diffusion connections.

Abstract: A holding sealing material includes a plurality of mats and at least one belt-shaped body. The plurality of mats include inorganic fibers and are layered. The plurality of mats are bundled by the at least one belt-shaped body. The at least one belt-shaped body has no fixing force which fixes the plurality of mats to the at least one belt-shaped body.

Abstract: The present invention is to provide a catalyst for removing nitrogen oxides which is capable of keeping sufficient denitrification performance, i.e., a high removal rate of nitrogen oxides in exhaust gas having a high NO2 content especially under conditions where the ratio of NO2/NO in exhaust gas is 1 or higher, a catalyst molded product therefor, and an exhaust gas treating method. The catalyst is designed for removing nitrogen oxides, which is used to denitrify exhaust gas containing nitrogen oxides having a high NO2 content, which comprises: at least one kind of oxide selected from the group consisting of copper oxides, chromium oxides, and iron oxides as a component for reducing NO2 to NO; and which further comprises: at least one kind of titanium oxide; at least one kind of tungsten oxide; and at least one kind of vanadium oxide as components for reducing NO to N2.

Abstract: A honeycomb structure wherein the thickness of each partition wall is 50.8 ?m inclusive to 161.5 ?m exclusive, the cell density is 15.5 to 62.0 cells/cm2, the cell opening ratio of the honeycomb structure body is 76 to 91%, the porosity of the partition walls is 35 to 45%, the average pore diameter of the partition walls is 2 ?m inclusive to 10 ?m exclusive, the material for the partition walls includes at least one member selected from the group consisting of cordierite, aluminum titanate, silicon carbide, alumina and mullite, and the value obtained by dividing the average pore diameter of the partition walls by the thickness of the partition walls is larger than 0.04 but smaller than 0.065.

Abstract: A method and system for high performance mercury capture from solid fuel combustion flue gas is provided. The method includes injecting pulverized activated carbon into a mercury capture system with at least a first and a second fabric filter, collecting the pulverized activated carbon captured in the second fabric filter, and injecting the collected pulverized activated carbon from the second fabric filter upstream of the first fabric filter for reuse to capture mercury from the process gas.

Abstract: A low-oxygen content exhaust flow produced by an engine that is combusting, on average, a stoichiometric mixture of air and fuel generally contains various unwanted gaseous emissions. The exhaust flow is treated by an exhaust aftertreatment system that includes a three-way-catalyst (TWC) and an ammonia-selective catalytic reduction (ammonia-SCR) catalyst positioned downstream from the TWC in a flow direction of the exhaust flow. The ammonia-SCR catalyst includes (1) a base metal ion-substituted zeolite and/or a base metal ion-substituted silicoaluminophosphate and (2) an oxygen storage material selected from the group consisting of a metal oxide or a mixed metal oxide that exhibits oxygen storage and release capacity. The serial arrangement of the TWC and the ammonia-SCR catalyst enhances the conversion of NOX to N2 in the low oxygen-content exhaust flow produced by the engine and helps prevent ammonia slip to the atmosphere.

Abstract: There is provided an exhaust gas purifying filter, which includes an inflow surface into which exhaust gas including particulate matter flows, an exhaust surface from which purified gas is exhausted, and a filter substrate which is constructed of a porous body, the filter substrate including a porous partition and a gas passage which is enclosed by the porous partition, a porous film which includes silicon carbide is provided on a surface of the porous partition, and in a pore diameter distribution of the porous film, pores with the pore diameter of 0.01 ?m or more and 3.0 ?m or less are 70% or more of total volume of the pores, and pores with the pore diameter of 0.01 ?m or more and 0.3 ?m or less are 5% or more and 90% or less of total volume of the pores.

Abstract: A method for controlling a selective catalytic reduction system (SCR) exploiting a set of predetermined trigger events and a set point for the NOx concentration, and an arrangement for SCR. At the occurrence of a trigger event, NOx concentration measurement downstream from the catalyst elements is started and the difference between the measured concentration and the set point is determined. If the difference is negative, the dosing of the reducing agent is decreased. If the difference is positive, the dosing of the reducing agent is increased and after system stabilization a new measurement is started. If the measured value is below the previous measured value, the same dosing is maintained. If the measured value is above the previous measured value, the dosing is decreased with an amount greater than the increase after the previous measurement.

Abstract: Disclosed herein is a catalytically active particulate filter, an exhaust gas cleaning system and a process for cleaning the exhaust gases of predominantly stoichiometrically operated internal combustion engines, which are suitable, as well as the gaseous CO, HC and NOx pollutants, also for removing particulates from the exhaust gas. The particulate filter comprises a filter body and a catalytically active coating consisting of two layers. The first layer is in contact with the incoming exhaust gas, the second layer with the outgoing exhaust gas. Both layers contain alumina. The first layer contains palladium. The second layer contains, in addition to rhodium, an oxygen-storing cerium/zirconium mixed oxide.

Abstract: The invention concerns a method for supplying iron, via the fuel, to the particulate trap of a diesel engine exhaust in a form suitable for promoting trap regeneration. The method involves the addition to the fuel of a defined colloid of iron oxide. Combustion of this colloid produces iron-containing compounds, especially iron oxides, which collect in association with carbonaceous particulate matter in the particulate trap, and function to promote the combustion of this matter. The colloid in particular shows a lower level of associated deposit formation on the fuel injectors than the iron additives of the prior art. The method is thus particularly suitable for modern engines showing increased susceptibility to fuel injector deposits. The colloid also shows a balance of properties providing excellent suitability for use as an additive in fuels, and especially in diesel engine on-board dosing devices.

Abstract: A ceramic honeycomb structure having a large number of flow paths partitioned by porous cell walls, the cell walls meeting the conditions; (a) the cell walls having porosity of 55-80%, (b) the cell walls having a median pore diameter D50 (measured by mercury porosimetry) of 5-27 ?m, (c) pores open on cell wall surfaces having an opening area ratio of 20% or more, (d) pores open on cell wall surfaces having a median opening diameter d50 (determined from equivalent circle diameters on an area basis) of 10-45 ?m, (e) the density of pores open on cell wall surfaces having equivalent circle diameters of 10 ?m or more and less than 40 ?m being 350/mm2 or more, (f) the maximum inclination of a curve of a cumulative pore volume relative to a pore diameter (determined from a pore distribution measured by mercury porosimetry) being 1.6 or more, and (g) a ratio D50/d50 of the median pore diameter D50 to the median opening diameter d50 being 0.65 or less.

Abstract: A filter element, in particular for filtering exhaust gases of an internal combustion engine, includes mutually parallel flow channels, at least two filter segments being provided which each have a subset of flow channels, the filter segments having a spacing from one another and being interconnected via connecting device(s) arranged integrally with the filter segments.

Abstract: A holding sealing material includes inorganic fibers, a mat shape, a first and a second end faces, a contact section and a void-forming section. The first end face and the second end face are approximately parallel in a width direction. The contact section includes a first distance between the first and the second end faces. The first distance is longest in a length direction. The void-forming section includes a second distance between the first and the second end faces. The second distance is shorter than the first distance. The holding sealing material has a structure to provide a void in a vicinity of the first and the second end faces of the void-forming section in a state where the holding sealing material is rolled up so that the first end face is made in contact with the second end face of the contact section.

Abstract: To provide an oxidation catalyst capable of burning PM of diesel engine exhausts gas at a low temperature, and hardly subjected to poisoning due to sulfur oxide. A composite oxide contains Ce, Bi, and M (wherein M is one or more elements selected from Mg, Ca, Sr, and Ba) and oxygen, and is manufactured, with a molar ratio of Ce, Bi, M expressed by Ce:Bi:M=(1?x?y):x:y, satisfying 0<x?0.4, and 0<y?0.4. This composite oxide is suitable as a PM combustion catalyst, and is hardly subjected to poisoning due to sulfur oxide.

Abstract: A particle filter arrangement for filtering exhaust gases of an internal combustion engine such as a diesel internal combustion engine, includes an inlet and an outlet and at least one particle filter arranged in the flow path of the exhaust gases between the inlet and outlet. The exhaust gases are conducted in a line, with the line having a first segment in which the exhaust gases are conducted substantially in the direction of the outlet. The line has a second segment in which the exhaust gases are conducted substantially in the direction of the inlet. An operating temperature of the arrangement sufficiently high to prevent full loading of the filter is generated particularly quickly in that the line also includes a third segment in which the exhaust gases are conducted substantially in the direction of the outlet.

Abstract: An air filter that includes a primary filter and a polishing filter. The primary filter comprises a monolith 10 that contains active-particulate. The air-to-be-filtered travels through the primary filter in a path generally parallel to the passageways 12. The polishing filter 36 has first and second major surfaces and also contains active-particulate. The polishing filter is generally arranged such that air travels from the first major surface to the second major surface when passing through it. The inventive filter demonstrates extraordinary performance over the same primary and polishing filters taken individually.

Abstract: An apparatus and method to clean flue gases. As shown in FIG. 1, a condenser 10 is provided having two packed beds (20/26) and two condensate loops. The condensate loops are configured such that anti-corrosive agent (40/41) may injected. Corrosives are removed from flue gases as condensate containing anti-corrosive agents passes over the flue gases.

Abstract: A duct can be configured to receive a denuding gas flow. A solid denuding surface that is connected to a drive system can be configured to move the solid denuding surface within the duct while the solid denuding surface is continuously concentrating one or more gas-phase species from the denuding gas flow on the denuding surface. Also, a denuding gas flow can be passed along a denuding surface to concentrate one or more gas phase species from the denuding gas flow onto the denuding surface with a diffusion denuding action. The denuding surface can be moved while continuing to concentrate the one or more gas phase species from the denuding gas flow onto the denuding surface.

Abstract: A device for the concurrent oxygen generation and control of carbon dioxide for life support system involves two stages, where a first stage removes CO2 from an exhalent side of a ventilation loop and a second stage employs Ceramic Oxygen Generators (COGs) to convert CO2 into carbon and O2. The first stage includes a plurality of chambers and means to switch the ventilation loop through at least one of the chambers, where CO2 removal is carried out before discharge of the CO2 depleted gas to an inhalant side of the ventilation loop, and to exclude the ventilation loop from the remaining chambers of the first stage, where these chambers are placed in communication with the second stage. The second stage has two portions separated by the COGs such that CO2 and the formed carbon remain on an intake portion from the O2 rich atmosphere on the exhaust side, which is plumbed via a metering valve to introduce the O2 rich atmosphere to the inhalant side of the ventilation loop.

Abstract: An exhaust gas purification system for an internal combustion engine of a motor vehicle is provided. The system includes a first particulate filter element and a second particulate filter element, which is connected downstream of the first particulate filter element and through which flows the exhaust gas that emanates from the first particulate filter element. The first particulate filter element operates as a system filter and the second particulate filter element operates as a diagnostic filter. A charge of the diagnostic filter can be determined, and the functional capability of the system filter can be deduced based thereon.

Abstract: A porous ceramic honeycomb article comprising a honeycomb body formed from cordierite ceramic, wherein the honeycomb body has a porosity P %?55% and a cell channel density CD ?150 cpsi. The porous channel walls have a wall thickness T, wherein (11+(300?CD)*0.03)?T?(8+(300?CD)*0.02), a median pore size ?20 microns, and a pore size distribution with a d-factor of ?0.35. The honeycomb body has a specific pore volume of VP?0.22. The porous ceramic honeycomb article exhibits a coated pressure drop increase of ?8 kPa at a flow rate of 26.5 cubic feet per minute when coated with 100 g/L of a washcoat catalyst and loaded with 5 g/L of soot.

Abstract: A honeycomb structure includes: porous partition walls having a large number of pores and disposed to form a plurality of cells communicating between two end faces, and plugged portions disposed to plug each of the cells on one of the end faces. A percentage of the number of carbon particulates contained in combustion exhaust gas satisfying the following condition (1) and passing through a honeycomb structure is 80% or more at a space velocity of 25000/h. The condition (1) is that the carbon particulates has a mean diameter of 0.07 to 0.2 ?m, a ratio of the carbon particulates having a diameter of 1 ?m or more is 0.1% or less in number and that a concentration of the carbon particulates is 10 mg/m3. The honeycomb structure is excellent in purification efficiency, has low pressure loss, and is mountable even in a limited space.

Abstract: A filter device for filtering gaseous fluids has a spiral-shaped wound filter path having parallel flow channels for the fluid. The flow channels end in a wound state at an axial face of the filter element at axially different positions. At the second, opposite axial face, the filter element has a geometry deviating from that of the first face.

Abstract: Various systems, devices, NO2 absorbents, NO2 scavengers and NO2 recuperator for generating nitric oxide are disclosed herein. According to one embodiment, an apparatus for converting nitrogen dioxide to nitric oxide can include a receptacle including an inlet, an outlet, a surface-active material coated with an aqueous solution of ascorbic acid and an absorbent wherein the inlet is configured to receive a gas flow and fluidly communicate the gas flow to the outlet through the surface-active material and the absorbent such that nitrogen dioxide in the gas flow is converted to nitric oxide.

Abstract: A filter for filtering particulate matter (PM) from exhaust gas emitted from a compression ignition engine, which filter comprising a porous substrate having inlet surfaces and outlet surfaces, wherein the inlet surfaces are separated from the outlet surfaces by a porous structure containing pores of a first mean pore size, wherein the porous substrate is coated with a wash coat comprising a plurality of solid particles comprising a molecular sieve promoted with at least one metal wherein the porous structure of the wash coated porous substrate contains pores of a second mean pore size, and wherein the second mean pore size is less than the first mean pore size.

Abstract: A system and method for reducing NOx emissions from a lean burn combustion source is provided. The system includes a blower passing air through a continuous duct having a hot portion and a reaction portion. The hot portion of the duct is positioned in the convective zone of the combustion source to heat the passing air for the reaction portion of the duct. An injector attached to a urea storage container is positioned in the reaction portion of the duct and sprays urea from the storage container into the heated air in the reaction duct for evaporation and decomposition into ammonia gas. The ammonia gas is then supplied to an injection grid in the exhaust duct of the lean burn combustion source upstream of a NOx reduction catalyst. The injection grid supplies the ammonia gas to the exhaust gas in the exhaust duct.

Abstract: A method of manufacturing a honeycomb body is disclosed having the steps of mixing inorganic source materials, a nut shell pore former, and forming aids to form a plasticized batch, wherein the nut shell pore former has a particle size distribution with 20 ?m?dp50?70 ?m, and forming the plasticized batch into the honeycomb body having a plurality of channels formed by intersecting walls. Green honeycombs and porous ceramic honeycombs produced by the method are also disclosed.

Abstract: A method of manufacturing an exhaust gas purifying apparatus includes providing an exhaust gas-treating body. A holding sealing material is provided. The holding sealing material includes inorganic fibers. The holding sealing material has a first end face and a second end face each provided approximately in parallel with a width direction. The holding sealing material is wound around a periphery of the exhaust gas-treating body to form a gap between the first end face and the second end face. The exhaust gas-treating body with the holding sealing material is housed in a casing. At least one of a first electrode member and a first sensor is disposed at the gap of the holding sealing material so that at least one of the first electrode member and the first sensor is connected to the exhaust gas-treating body, passes through the holding sealing material, and penetrates the casing.

Abstract: In accordance with the invention there are devices and processes for making ceramic nanofiber mats and ceramic filters for use in high temperature and in corrosive environments. The process for forming a ceramic filter can include electrospinning a preceramic polymer solution into a preceramic polymer fiber having a diameter from about 10 nm to about 1 micron and forming a preceramic polymer fiber web from the preceramic polymer fiber onto a collector. The process can also include pyrolyzing the preceramic polymer fiber web to form a ceramic nanofiber mat having a diameter less than the diameter of the preceramic polymer fiber, the ceramic nanofiber mat comprising one or more of an oxide ceramic and a non-oxide ceramic such that the ceramic fiber mat can withstand temperature greater than about 1000 ° C.

Abstract: There is provide a honeycomb filter which can suppress generation of cracks in plugged portions due to heat generated by burning of a PM during regeneration and comprises a honeycomb basal body including porous partition walls arranged to form a plurality of cells disposed in parallel with one another and including inflow cells and outflow cells which are formed adjacent to the inflow cells; first plugged portions with which one end of each of the inflow cells is plugged; second plugged portions with which another end of each of the outflow cells is plugged; porous collecting layers formed on the inflow-cells side surfaces of the partition walls; and end aggregate layers made of a particulate aggregate material and formed on the inflow-cells-side surfaces of the first plugged portions, and a thickness of the end aggregate layers is from 0.5 to 5 mm.

Abstract: Ag/Al2O3 materials may be packaged in a suitable flow-through reactor, close coupled to the exhaust manifold of a diesel engine, and upstream of other exhaust gas treatment devices, such as a diesel oxidation catalyst and a selective reduction catalyst for NOx. The silver/alumina catalyst material uses hydrogen in a cold-start engine exhaust and serves to oxidize NO to NO2 in the relatively low temperature, hydrocarbon-containing, exhaust during a short period following the engine cold start, and to temporarily store NOx during the start-up period. After the exhaust has heated downstream catalytic devices, the silver yields its nitrogen oxides for conversion to nitrogen by the then-operating devices before NOx is discharged to the atmosphere.

Abstract: A mat includes inorganic fibrous substances, first and second main faces, first and second side faces and intertwined portions. The intertwined portions respectively extend from needle piercing points of the first main face to needle piercing points of the second main face. A first virtual straight line and each of second virtual straight lines intersect with each other at a first angle of less than about 90° when viewed from the first side face to the second side face. The first virtual straight line and each of third virtual straight lines intersect with each other at a second angle of more than about 90° when viewed from the first side face to the second side face. The second virtual straight lines and the third virtual straight lines intersect with each other at a third angle when viewed from the first side face to the second side face.

Abstract: A holding sealing material includes inorganic fibers, a mat shape, a first end face and a second end face and a penetration portion. The mat shape has a width direction, a length direction and a thickness direction. The first end face and the second end face are each provided approximately in parallel with the width direction. The penetration portion penetrates the holding sealing material in the thickness direction.

Abstract: A gas analysis device according to the present invention includes a flue-gas extraction pipe for extracting flue gas from a flue gas duct to which flue gas including both of NH4Cl and SO3 is fed, a collector that is provided in the flue-gas extraction pipe, for removing soot dust contained in the extracted flue gas, a roll filter that is provided in the flue-gas extraction pipe, for depositing both of NH4Cl and SO3 contained in the flue gas, and a measurement device for measuring both of NH4Cl and SO3 contained in the flue gas by irradiating a sample including both of NH4Cl and SO3 deposited by the roll filter with X-rays and detecting fluorescent X-rays generated from the sample.