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: A system for removal of carbon dioxide from a process gas includes an absorption arrangement arranged to allow contact between the process gas and an ammoniated solution within the absorption arrangement such that at least a part of the carbon dioxide of the process gas is captured by the ammoniated solution. The absorption arrangement is arranged to, with regard to the ammoniated solution, only accommodate ammoniated solution without solids. A first heat exchanger is arranged to cool the ammoniated solution including captured carbon dioxide after it has exited the absorption arrangement. A separator is arranged to remove at least a part of any solids in the cooled ammoniated solution. A second heat exchanger is arranged to heat the ammoniated solution after it has exited the separator and returned to the absorption arrangement.

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 desulfurization apparatus includes: a desulfurization section (3) that brings exhaust gas containing sulfur oxide into gas-liquid contact with absorbing liquid to thereby remove the sulfur oxide; a folded-plate type demister (4) that is installed above the desulfurization section (3), and removes mist generated in the desulfurization section (3); a packing section (5) that is installed above the folded-plate type demister (4), has a same cross-sectional area as the desulfurization section (3) and the folded-plate type demister (4), and removes mist that is not removed by the folded-plate type demister (4); and a washing section (6) that injects water to the packing section (5). As a result of this, mist contained in the exhaust gas is easily and reliably reduced.

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: 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: 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 system for reducing NOx in a flue gas stream, including an absorption element, a first inlet in fluid communication with the chamber configured to deliver a pressurized flue gas to the chamber, and a second inlet in fluid communication with the chamber configured to deliver an absorbing additive to the chamber. An outlet is in fluid communication with the chamber to exhaust from the chamber flue gas that has contacted the absorbing additive. A method for reducing NOx in a flue gas including the steps of: providing a flue gas in a chamber of an absorption element, providing an absorbing additive so that it contacts at least a portion of the flue gas, and exhausting at least a portion of the flue gas from the chamber.

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: 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 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: The containment facility ventilation system comprises a two stage scrubber configuration. Exhaust air flows out of an animal containment facility and into a particulate scrubber, which removes particulates and reduces the alkalinity of the exhaust air. The particulate scrubber also reduces the carbon dioxide in the exhaust air. The air then flows into a chemical scrubber which effectively removes ammonia from the exhaust air. The chemical scrubber comprises a potassium bisulfate scrubber solution, and the particulate scrubber comprises a neutral calcium salt scrubber solution.

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 catalytic filter module for gaseous fluids is disclosed comprising a block-shaped filter element, a catalytic element and a clean gas collecting and discharge arrangement. The catalytic element is substantially coextensive with the filter element, said filter element has a feed face and on its opposite side a discharge face from which filtrate exits to be received by the upstream face of the catalytic element. The gaseous fluid exits the catalytic element as clean gas at a clean gas face thereof opposite to the upstream face. The clean gas collecting and discharge arrangement comprises one or more channels extending across the whole clean gas face of the catalytic element deflecting and directing the clean gas flow transverse to the vertical of the clean gas face of the catalytic element to a clean gas discharge opening of the filter module at a side face thereof.

Abstract: A heat recovery steam generator includes a casing for receiving exhaust gas from a turbine, a heat exchanger positioned within the casing for thermal communication with the exhaust gas, and an ammonia vapor distributor positioned within the casing. An ammonia vaporization unit is configured for conversion of aqueous ammonia to ammonia vapor and communication of the ammonia vapor to the distributor. A first extraction line operatively connects between the casing and the ammonia vaporization unit for communication of exhaust gas to the ammonia vaporization unit. A second extraction operatively connects between the casing and the ammonia vaporization unit for communication of exhaust gas to the ammonia vaporization unit. A catalytic reduction system is located within the casing and positioned downstream from the distributor for effecting a reaction between the ammonia vapor and NOx in the exhaust gas.

Abstract: Safely processing fluid via monitoring and decreasing explosiveness of vapor-gas species formed therefrom, or contained therein. Fluid input unit 12, for transporting source fluid 24; first fluid processing unit 14, for receiving and processing fluid 26, and forming processed fluid including vapor-gas portion 30; vapor-gas explosiveness monitoring and decreasing unit 16, for measuring at least an indication of explosiveness level of vapor-gas portion 30, wherein if the measurement exceeds a pre-determined threshold explosiveness level (PDTEL), then vapor-gas portion 30 is condensed, for forming condensate and output vapor-gas 32 whose explosiveness level is less than lower explosion limit (LEL) of output vapor-gas 32; second fluid processing unit 18, for processing output vapor-gas 32, and forming processed vapor-gas product 34.

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: The disclosure provides an improved means of controlling mercury emissions from coal-fired boiler applications. Specifically, the disclosure comprises a static mixing device placed in the flue gas stream. The static mixing device can enhance dispersion of injected sorbents in the flue gas, resulting in improved mercury capture at a lower sorbent injection rate.

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: An aftertreatment module for use with an exhaust system is disclosed. The aftertreatment module may have at least one exhaust treatment device, and a generally cylindrical housing configured to receive the at least one exhaust treatment device. The aftertreatment module may also have an inlet integral with the generally cylindrical housing and configured to direct exhaust into the at least one exhaust treatment device, and an outlet integral with the generally cylindrical housing and configured to direct exhaust out of the at least one exhaust treatment device. At least one of the inlet and the outlet may extend in a radial direction of the generally cylindrical housing from an axial location at which an open area of the at least one of the inlet and the outlet at least partially overlaps with the at least one exhaust treatment device.

Abstract: Provided is an apparatus for processing exhaust fluid in which a fluid generated in a process chamber of an apparatus for manufacturing a semiconductor, a display panel, or a solar cell is ejected to the outside.

Abstract: The invention pertains to a system for purification of a carbon dioxide rich flue gas generated in a boiler combusting a fuel in the presence of a gas containing oxygen, and being contaminated by NOx gases, wherein the system comprising one or more gas drier(s) comprising desiccants for removal of at least a portion of water content of the further compressed carbon dioxide rich flue gas; and a closed loop connected to the drier(s) for regeneration of desiccants of the drier(s) wherein the NOx gases are removed substantially separately from the water vapour. The invention pertains also to a method for removing the NOx gases substantially separately from the water vapour.

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: This invention relates to an apparatus for reducing a nitrogen oxide. In particular, it relates to the use of a gas analyzer to obtain information related to the compositional content of a multi-component gas mixture that contains a nitrogen oxide for the purpose of assisting in the control of the reduction. In particular, the apparatus provides control of the reaction of reduction, and, more particularly, control of the injection of a reducing agent into the gas mixture containing the nitrogen oxide. The apparatus enables the calculation of the amount of reducing agent to be injected in relation to information about the compositional content of the gas mixture, and a gas analyzer containing an array of chemo/electro-active materials may be used in conjunction therewith.

Abstract: An exhaust system including a selective catalytic reduction (SCR) component and an oxidation catalyst component. The exhaust system also includes an exhaust treatment fluid injection system for dispersing an exhaust treatment fluid into an exhaust stream at a location adjacent either the SCR component or the oxidation catalyst component, wherein the exhaust treatment fluid injection device includes a common rail that provides the exhaust treatment fluid under pressure to a plurality of injectors that dose the exhaust treatment fluid into the exhaust stream. The exhaust treatment fluid injection device also includes a return rail for returning unused exhaust treatment fluid to the fluid source.

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 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: An internal combustion engine is coupled to an electric power generator. An exhaust manifold for the engine includes an exhaust gas conduit. A housing includes a catalyst in fluid communication with the conduit to receive exhaust produced by the engine. The catalyst is operable to reduce one or more constituents of the exhaust.

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: An exhaust gas purifying device is provided with an exhaust manifold having a collecting section, and a catalytic converter provided downstream of the exhaust manifold. The catalytic converter has upstream and downstream catalysts. The upstream catalyst includes a carrier, a first layer located on the carrier containing Pd, a second layer located on the first layer containing Rh, and a third layer located on the second layer containing Pd. The downstream catalyst includes a carrier, a first layer located on the carrier containing Pd, and a second layer located on the first layer containing Pt and Rh. The collecting section connects to the catalytic converter after passing, in order from the upstream side, through a flow regulating path and a neck section which is provided in the flow regulating path. The flow regulating path has a predetermined length and a width which is gradually reduced to the downstream side.

Abstract: An exhaust purification system in which when an air-fuel ratio of exhaust gas is leaner than a stoichiometric air-fuel ratio, a silver-alumina-based catalyst device releases adsorbed NO2 at a first set temperature and releases adsorbed NO at a second set temperature which is lower than the first set temperature. When the air-fuel ratio of the exhaust gas is leaner than the stoichiometric air-fuel ratio and the silver-alumina-based catalyst device is a third set temperature which is lower than the second set temperature, a temperature rise of the silver-alumina-based catalyst device is suppressed to maintain the silver-alumina-based catalyst device near the third set temperature, and at least part of the NO which is adsorbed at the silver-alumina-based catalyst device is oxidized to NO2 to be adsorbed at the silver-alumina-based catalyst device, then the suppression of the temperature rise of the silver-alumina-based catalyst device is lifted.

Abstract: This gas purifying process removes trace constituents from a mixed gas that includes a rare gas and nitrogen as main components, and at least one from among hydrogen, nitrogen and hydrogen reaction products, and water vapor as the trace constituent. This process sequentially carries out an adsorbing step for removing water vapor and nitrogen and hydrogen reaction products; a hydrogen oxidation step for converting the hydrogen into water vapor by means of a hydrogen oxidation catalytic reaction in the presence of oxygen; and a drying step for removing water vapor generated in the hydrogen oxidation step. When nitrogen oxides are included as a trace constituent, then a denitration step is carried out prior to the adsorbing step, to convert nitrogen oxides into nitrogen and water vapor by means of a catalytic denitration reaction in the presence of a reducing substance.

Abstract: The present invention relates to a method and a system for cleaning a CO2 rich flue gas stream containing water vapor and NOX prior to CO2 sequestration.

Abstract: The invention relates to a process and a plant for producing cement clinker, which has a furnace system and has essentially the following process steps:—raw material is preheated in a preheater by means of hot offgases from the furnace system,—dust is removed from the hot offgas downstream of the preheater in a preliminary dust removal apparatus to a residual dust concentration of max. 20 g/standard m3,—the offgas which has been subjected to preliminary dust removal is purified in a selective catalytic flue gas purification plant (selective catalytic reduction, SCR),—at least part of the offgas purified in the flue gas purification plant is conveyed in a bypass around a raw material milling plant to a cooling device and cooled there to temperatures of max. 140° C.,—before the residual dust in the offgas is precipitated in a process filter and—at least part of the residual dust precipitated in the process filter is discharged for removal of mercury.

Abstract: A combustion-type exhaust gas treatment apparatus is used to treat a harmful exhaust gas by combustion to render the gas harmless. The treatment apparatus includes a combustion treatment section, a cooling section, and a washing section. The combustion treatment section includes an exhaust-gas treatment combustor, a body made from metal and having a roughened inner surface, and a water-film formation mechanism adapted to form a water film on the inner surface of the body. The combustion treatment of the exhaust gas is performed in the body.

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: A system for treating an air stream exhausted from a firing kiln utilized to heat a ceramic substrates includes an outlet assembly and a thermal oxidizer. The outlet assembly may be in fluid communication with the firing kiln, and may be operational to receive an exhaust gas stream and a waste heat stream from the firing kiln. A temperature of the waste heat stream may be greater than the exhaust gas stream such that a temperature of an air stream comprising the waste heat stream and the exhaust gas stream within the outlet assembly is greater than the exhaust gas stream. The thermal oxidizer may be in fluid communication with the outlet assembly to receive the air stream and remove pollutants from the air stream.

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 and apparatus for processing a sour gas rich in carbon dioxide in a Claus process, so sulfur compounds are removed by a selective solvent in a gas scrubbing process. Sulfur components and carbon dioxide, are separated into at least two sour gas fractions, wherein at least one sour gas fraction having a higher content of sulfur components is obtained, wherein the fraction having the highest hydrogen sulfide content is introduced in the thermal reaction stage of the Claus furnace with a gas containing oxygen by means of a burner. The sulfur is converted to sulfur dioxide in the thermal reaction stage of the Claus furnace and exhaust gases are discharged into the closed Claus reaction chamber behind the burner. The remaining sour gas fractions stripped of sulfur components are fed to the Claus reaction chamber and are mixed with the combustion gases leaving the burner.

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: The present invention relates to a diesel particle filter which has a coating active in oxidation catalysis and which is characterized in that said diesel particle filter comprises a material zone which removes platinum traces contained in the exhaust-gas flow, and to the use of said diesel particle filter in the purification of exhaust gases of diesel engines.

Abstract: In the application a spray dryer absorption apparatus for treating a stream of flue gas containing acidic components is disclosed. The apparatus comprises a chamber having vertical cylindrical walls, said chamber comprises (i) an inlet for a flue gas stream containing an acidic component, (ii) an atomizer for spraying droplets of an absorbent slurry into said flue gas stream to effect a chemical reaction between the droplets and the acidic component of the flue gas, thereby forming a particulate reaction product, and (iii) an outlet for the treated flue gas and entrained particulate reaction product, wherein the bottom of the chamber having vertical cylindrical walls is substantially horizontal and impervious to gases. The apparatus of the invention has the advantage of a simplified geometry accounting for lower building and maintenance costs.

Abstract: Systems and methods are provided for a layered emission control device coupled to an exhaust manifold. Various formulations may be incorporated in a plurality of layers of the device to enable various emission control functions to be grouped within spatial constraints. For example, a first layer may include a first, oxidizing catalyst, a second layer may include a HC trap, and a third layer may include a second, different oxidizing catalyst, the second layer positioned between the first and third layers. The layers may be organized to reduce functional interference and improve functional synergy between the various emission control functions.

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: SO2 and/or NOx are removed from gaseous CO2 at elevated pressure(s) in the presence of molecular oxygen and water and, when SO2 is to be removed, NOx, to convert SO2 to sulfuric acid and/or NOx to nitric acid. The sulfuric acid and/or nitric acid is/are then removed from the gaseous carbon dioxide to produce SO2-free, NOx-lean carbon dioxide gas. The invention has particular application in the removal of SO2 and/or NOx from carbon dioxide flue gas produced in an oxyfuel combustion process, for example, in a pulverized coal fired power station.

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.