Abstract: The present invention deals with activation and start-up procedures of catalysts for the deep HDS of middle distillates for producing ultra low sulfur diesel (ULSD), consisting of two in situ activation stages: at stage 1, TGA is applied, and at stage 2, DMDS is used; kerosene is the transport means at these stages, which are carried out under given temperature and pressure conditions, and feedstock and hydrogen flows at established times. After the activation of the catalyst in situ, the stabilization stage takes place under selected temperature and pressure conditions, feedstock and hydrogen flow at established times, with which the stabilization of the highly dispersed metallic sulfides is achieved and, in this way, the activity of the catalysts removing contaminants for the production of ULSD is increased.

Abstract: The present disclosure addresses limitations in ferritic materials. In at least one aspect, the present disclosure provides core-shell nanoparticles exhibiting improved characteristics for implementations and adoptability in numerous applications. Further aspects of the disclosure provide core-shell nanoparticles for use in electronic, magnetic and electro-magnetic applications. Still, other aspects of the present disclosure provide core-shell nanoparticles for a thermochemical water-splitting reaction resulting in increased H2 volume generation during multiple thermochemical cycles.

Abstract: A composition including inorganic fibers having a surface area of at least 5 m2/g and an active agent incorporated into the inorganic fibers and/or applied onto at least a portion of the inorganic fibers. Products including the composition may include fiber aggregates, composite materials, filter elements, catalytic elements, exhaust gas treatment devices and other exhaust system components, and papers.

Abstract: The present invention relates to a method for the treatment of an exhaust gas comprising carbon monoxide (CO) and/or one or more volatile organic compounds (VOCs) using a PGM-free catalyst article comprising a mixed oxide of Mn, Cu, Mg, Al and La. The present invention also relates to an HVAC system comprising a PGM-free catalyst article.

Abstract: A slurry-phase catalyst composition may include a disulfide oil and a first metal complex. The first metal complex may include at least one transition metal selected from the group consisting of molybdenum, cobalt, nickel, tungsten, iron, and combinations of these. The first metal complex may also include a plurality of ligands bonded to the at least one transition metal. The plurality of ligands may include at least one first ligand selected from the group consisting of dim ethyl sulfide, dimethyldisulfide, diethyl sulfide, diethyldisulfide, methyl ethyl sulfide, methylethyldisulfide, and combinations thereof, and the transition metal may be bonded to a sulfur atom of the at least one first ligand.

Abstract: An oxidation catalyst composite, methods, and systems for the treatment of exhaust gas emissions from a diesel engine are described. More particularly, an oxidation catalyst composite including a first washcoat comprising a zeolite, Pt, and first refractory metal oxide support containing manganese, a second washcoat comprising a second refractory metal oxide support, a Pt component and a Pd component, and a third washcoat comprising palladium and a rare earth oxide component is described.

Abstract: Methods of producing a catalyst for oxidation of C2 hydrocarbons and methods of using the catalyst are disclosed. Molybdenum, vanadium, and niobium metal or metal containing compounds are used to form a slurry in water. After agitating the slurry for at least 15 minutes, palladium or a palladium containing compound is added to the slurry. After further agitation, a precipitate is collected, dried and calcined to obtain an active catalyst, with palladium primarily distributed on a surface of the catalyst. The active catalyst is capable of catalyzing the conversion of C2 hydrocarbons into acetic acid.

Abstract: An active material useful in an oxidative dehydrogenation reactor system has an active phase, and a mixed metal oxide support phase. The active phase includes a transition metal oxide such as manganese oxide, which is reversibly oxidizable and/or reducible between oxidized and reduced states. The support phase includes a mixed metal oxide of a two or more IUPAC Group 2-14 elements. The active phase can also include a promoter such as Na-WO4 and/or a selectivity modifier such as Al or ceria. Also, a reactor including the active material in a reactor, a method of making the active material, and a method of using the active material in a regenerative reaction process.

Abstract: A three-way catalyst for reduced palladium loading is provided. The catalyst includes an inert substrate and a palladium catalyst material coating the substrate. The palladium catalyst material includes a support material formed from one of 10% CeO2/Al2O3, 20% CeO2—Al2O3 (20CeAlOy), 30% CeO2—Al2O3 (30CeAlOy), Al2O3, and MOx-Al2O3, wherein M is one of copper, iron, manganese, titanium, zirconium, magnesium, strontium, and barium. The palladium catalyst material includes a layer of CeO2 material disposed upon the support material, wherein the layer of CeO2 material is dispersed on a surface of the support material. The palladium catalyst material includes an active component including a layer of praseodymium oxide particles dispersed across the surface of the layer of CeO2 material and a layer of palladium particles disposed upon and dispersed across the surface of the layer of CeO2 material at locations each corresponding to a respective location of each of the praseodymium particles.

Abstract: The invention relates to a process for the hydrodesulfurization of a sulfur-containing olefinic gasoline cut in which said gasoline cut, hydrogen and a regenerated catalyst are brought into contact, said process being carried out at a temperature of between 200° C. and 400° C., a total pressure of between 1 and 3 MPa, an hourly space velocity, defined as being the flow rate by volume of feedstock relative to the volume of catalyst, of between 1 and 10 h?1; and a hydrogen/gasoline feedstock ratio by volume of between 100 and 1200 SI/I, said regenerated catalyst resulting from an at least partially spent catalyst resulting from a process for the hydrodesulfurization of a sulfur-containing olefinic gasoline cut and comprises at least one metal from group VIII, at least one metal from group VIb and an oxide support.

Abstract: The invention relates to a process for the hydrodesulfurization of a sulfur-containing olefinic gasoline cut in which said gasoline cut, hydrogen and a rejuvenated catalyst are brought into contact, said hydrodesulfurization process being carried out at a temperature of between 200° C. and 400° C., a total pressure of between 1 and 3 MPa, an hourly space velocity, defined as being the flow rate by volume of feedstock relative to the volume of catalyst, of between 1 and 10 h?1 and a hydrogen/gasoline feedstock ratio by volume of between 100 and 1200 Sl/l, said rejuvenated catalyst resulting from a hydrotreating process and comprises at least one metal from group VIII, at least one metal from group VIb, an oxide support and at least one organic compound containing oxygen and/or nitrogen and/or sulfur.

Abstract: Processes for making phenol and xylenes from a phenols-containing feed are described. The processes involve transalkylation of alkylphenols to form phenol and alkylbenzenes. The phenol is separated from the alkylbenzenes, and the alkylbenzenes may be separated into benzene, toluene, xylenes, and heavy alkylbenzene streams. The benzene stream may be recycled to the transalkylation reaction zone. The toluene may be sent to a disproportionation reaction zone, and the product is sent back to the aromatic separation zone. The toluene can also be recycled to the transalkylation zone. The xylenes are separated into a p-xylene stream and a mixed xylene stream comprising m-xylene and o-xylene. The mixed xylene stream is isomerized and the isomerized product is sent back to the aromatic separation zone. The heavy alkylbenzenes are dealkylated and separated, with the aromatic stream being recycled to the aromatic separation zone.

Abstract: Methods of producing an isomerization catalyst include preparing a catalyst precursor solution, hydrothermally treating the catalyst precursor solution to produce a magnesium oxide precipitant, calcining the magnesium oxide precipitant to produce an isomerization catalyst precursor, soaking the isomerization catalyst precursor in an acid solution comprising sulfuric acid to product a isomerization catalyst precursor precipitant, and calcining the isomerization catalyst precursor precipitant to produce the isomerization catalyst. The catalyst precursor solution includes at least a magnesium precursor, a hydrolyzing agent, and cetrimonium bromide. Methods of producing 1-butene from a 2-butene-containing feedstock with the isomerization catalyst are also disclosed.

Abstract: A process for synthesis of PtNi high surface area core/shell particles. The processing including formation of PtNi nanoparticles, exposure of the PtNi nanoparticles to oxygen to form a nickel oxide coating on the nanoparticles at the same time the segregation of Ni to surface induces a Pt-skin with PtNi core structure, removal of the nickel oxide coating to form PtNi core/Pt shell (or Pt-skin) structure.

Abstract: A catalyst composition including nickel foam and a plurality of carbon-doped nickel oxide nanorods disposed on the nickel foam.

Abstract: The invention relates to a novel catalyst for hydrogenation for hydrogenating at least one of dicarboxylic acid or its acid anhydride. The catalyst for hydrogenation according to a first embodiment is obtained by supporting at least one of palladium or platinum, and cobalt on a carrier, and subjecting the resulting carrier to a reduction treatment at 400 K or higher. The catalyst for hydrogenation according to a second embodiment is obtained by supporting at least one of palladium or platinum, and molybdenum on a carrier, and subjecting the resulting carrier to a reduction treatment at 500 K or higher.

Abstract: A vehicular exhaust filter comprising a porous substrate having an inlet face and an outlet face with the porous substrate comprising inlet channels extending from the inlet face and outlet channels extending from the outlet face is disclosed. The inlet channels and the outlet channels are separated by a plurality of filter walls having a porous structure. The vehicular exhaust filter is loaded with a refractory powder having a tapped density before loading of less than 0.10 g/cm3 and the vehicular exhaust filter has a mass loading of the refractory powder of less than 10 g/l.

Abstract: Embodiments of the present disclosure are directed to a coated hydroprocessing catalyst comprising: a hydroprocessing catalyst comprising a porous support and at least one metal supported on the porous support; wherein the porous support comprising silica, alumina, titania, or combinations thereof; and the at least one metal selected from IUPAC Groups 6, 9 and 10 metals; a catalyst activation agent, a catalyst deactivation agent, or both loaded onto pores of the porous support, the catalyst activation agent comprising at least one sulfur compound and the catalyst deactivation agent comprising at least one nitrogen compound; and a coating layer on a surface of the hydroprocessing catalyst, the coating layer encapsulating the catalyst activation agent, the catalyst deactivation agent, or both within the hydroprocessing catalyst, wherein the coating layer comprises a polymer, or a paraffinic oil.

Abstract: Embodiments of the present invention include a filter element for decomposing contaminants including a substrate, and a photocatalytic composition comprising at least a photocatalyst and a co-catalyst. The embodiments of the present invention also includes a system for decomposing contaminants including a substrate, and a photocatalytic composition comprising at least a photocatalyst and a co-catalyst; and a method using the system.

Abstract: Embodiments of the present disclosure are directed to a method of producing an encapsulated hydroprocessing catalyst comprising: preparing a hydroprocessing catalyst comprising a porous support and at least one metal supported on the porous support, the porous support comprising alumina, silica, titania, or combinations thereof, and the at least one metal selected from IUPAC Groups 6, 9 and 10 metals; applying a catalyst activation precursor comprising a sulfur containing compound, a catalyst deactivation precursor comprising a nitrogen containing compound, or both onto pores of the hydroprocessing catalyst to form a loaded hydroprocessing catalyst; and coating the loaded hydroprocessing catalyst with a coating material to produce the encapsulated hydroprocessing catalyst, wherein the coating material comprises a polymer or a paraffinic oil.

Abstract: The present invention is directed to the preparation of a cobalt containing catalyst, a precipitate as an intermediate product, a Fischer-Tropsch catalyst and a process for producing normally gaseous, normally liquid and optionally normally solid hydrocarbons from synthesis gas. The precipitate and catalyst comprise crystalline Co(OH)(CO3)0.5, the crystals are needle shaped and have a surface area of at least 80 m2/g dry precipitate.

Abstract: Described are precursor compounds and methods for atomic layer deposition of films containing scandium(III) oxide or scandium(III) sulfide. Such films may be utilized as dielectric layers in semiconductor manufacturing processes, particular for depositing dielectric films and the use of such films in various electronic devices.

Abstract: Proposed are a low-temperature DeNOx catalyst for selective catalytic reduction having improved sulfur resistance and a method of manufacturing the same. The low-temperature DeNOx catalyst for selective catalytic reduction having improved sulfur resistance accelerates the reduction reaction of nitrogen oxides even at low temperatures despite the small amount of vanadium supported, improves sulfur poisoning resistance, does not cause secondary environmental pollution by treated gas, has excellent abrasion resistance and strength and thus the removal efficiency of nitrogen oxides is not reduced even during long-term operation, and is easy to manufacture, thus contributing to commercialization.

Abstract: A catalyst containing LF-type B acid preparing ethylene using direct conversion of syngas is a composite catalyst and formed by compounding component A and component B in a mechanical mixing mode. The active ingredient of the component A is a metal oxide; the component B is a zeolite of MOR topology; and a weight ratio of the active ingredients in the component A to the component B is 0.1-20. The reaction process has an extremely high product yield and selectivity, with the selectivity for light olefin reaching 80-90%, wherein ethylene has high space time yield and can reach selectivity of 75-80%. Meanwhile, the selectivity for a methane side product is extremely low (<15%).

Abstract: A reduction catalyst body for carbon dioxide of an embodiment includes a metal layer, and a projection provided on the metal layer. The projection is constituted of an aggregate of fine metal particles, and possesses a polyhedral structure having surfaces of three faces or more of a polygon. The projection has a site of reducing carbon dioxide, as at least a part of the surfaces.

Abstract: A heat treatment method performed to form a particle structure of a carbon-supported metal catalyst includes preparing the carbon-supported metal catalyst by supporting metals on a support including carbon. The heat treatment method also includes applying heat shock to the carbon-supported metal catalyst. The applying heat shock to the carbon-supported metal catalyst includes raising a temperature of the carbon-supported metal catalyst to a first temperature and lowering the temperature of the carbon-supported metal catalyst to a second temperature. A difference between the first temperature and the second temperature is 500° C. to 1,100° C. The applying heat shock to the carbon-supported metal catalyst is repeated at least once. A carbon-supported metal catalyst is prepared by the heat treatment method.

Abstract: A new chromium-containing fluorination catalyst is described. The catalyst comprises an amount of zinc that promotes activity. The zinc is contained in aggregates which have a size across their largest dimension of up to 1 micron. The aggregates are distributed throughout at least the surface region of the catalyst and greater than 40 weight % of the aggregates contain a concentration of zinc that is within ±1 weight % of the modal concentration of zinc in those aggregates.

Abstract: In an aspect, the present disclosure provides a method for the oxidative coupling of methane to generate hydrocarbon compounds containing at least two carbon atoms (C2+ compounds). The method can include mixing a first gas stream comprising methane with a second gas stream comprising oxygen to form a third gas stream comprising methane and oxygen and performing an oxidative coupling of methane (OCM) reaction using the third gas stream to produce a product stream comprising one or more C2+ compounds.

Abstract: A method for oxidizing a waste stream having hydrogen therein includes flowing the waste stream with hydrogen into an oxidant stream for mixing the streams in a proportion for providing a mixture below lower flammability limits (LFL), including the LFL of hydrogen; and introducing the mixed streams into a ceramic matrix bed of a flameless thermal oxidizer maintained at a temperature above auto-ignition temperature of the mixture. A related apparatus is also provided.

Abstract: Provided is a catalyst layer for fuel cell which has a high catalytic activity and enables maintaining the high catalytic activity. Disclosed is an electrode catalyst layer for fuel cell including a catalyst containing a catalyst carrier having carbon as a main component and a catalytic metal supported on the catalyst carrier, and a polymer electrolyte having a sulfonic acid group (—SO3H) as an ion exchange group, in which the catalyst has the R? (D?/G intensity ratio) of 0.6 or less, which is the ratio of D? band peak intensity (D? intensity) measured in the vicinity of 1620 cm?1 relative to G band peak intensity (G intensity) measured in the vicinity of 1580 cm?1 by Raman spectroscopy, and has BET specific surface area of 900 m2/g catalyst carrier or more, and mole number of a sulfonic acid group in the polymer electrolyte relative to weight of the catalyst carrier is 0.7 mmol/g or more and 1.0 mmol/g or less.

Abstract: Process for hydrogenating toluenediamine (TDA) tar containing TDA and high boilers relative to TDA, including the step of contacting the toluenediamine tar with a heterogeneous hydrogenation catalyst comprising at least one metal selected from the group consisting of Ni, Co, Ru, Pd, Pt on at least one catalyst support selected from the group consisting of carbon, TiO2 and ZrO2, and with hydrogen under hydrogenating conditions.

Abstract: Embodiments of emission reduction system including various embodiments of an emission filters for a power plant including a gas turbine are disclosed. The system includes: an emission filter; and a retraction system operably coupled to an exhaust passage of the gas turbine. The exhaust passage defines an exhaust path of exhaust from the gas turbine. The retraction system selectively moves the emission filter between a first location within the exhaust path and a second location out of the exhaust path. In a combined cycle power plant, the first location is upstream of a heat recovery steam generator (HRSG). The systems and filters described allow for temporary positioning of emission filter(s) just downstream of a gas turbine exhaust outlet, or upstream of an HRSG, where provided, for emission reduction at low loads or startup conditions, and removal of the emission filter(s) once operations move to higher loads.

Abstract: Embodiments of emission reduction system including various embodiments of an emission filters for a power plant including a gas turbine are disclosed. The system includes: an emission filter; and a retraction system operably coupled to an exhaust passage of the gas turbine. The exhaust passage defines an exhaust path of exhaust from the gas turbine. The retraction system selectively moves the emission filter between a first location within the exhaust path and a second location out of the exhaust path. In a combined cycle power plant, the first location is upstream of a heat recovery steam generator (HRSG). The systems and filters described allow for temporary positioning of emission filter(s) just downstream of a gas turbine exhaust outlet, or upstream of an HRSG, where provided, for emission reduction at low loads or startup conditions, and removal of the emission filter(s) once operations move to higher loads.

Abstract: Embodiments of emission reduction system including various embodiments of an emission filters for a power plant including a gas turbine are disclosed. The system includes: an emission filter; and a retraction system operably coupled to an exhaust passage of the gas turbine. The exhaust passage defines an exhaust path of exhaust from the gas turbine. The retraction system selectively moves the emission filter between a first location within the exhaust path and a second location out of the exhaust path. In a combined cycle power plant, the first location is upstream of a heat recovery steam generator (HRSG). The systems and filters described allow for temporary positioning of emission filter(s) just downstream of a gas turbine exhaust outlet, or upstream of an HRSG, where provided, for emission reduction at low loads or startup conditions, and removal of the emission filter(s) once operations move to higher loads.

Abstract: Embodiments of emission reduction system including various embodiments of an emission filters for a power plant including a gas turbine are disclosed. The system includes: an emission filter; and a retraction system operably coupled to an exhaust passage of the gas turbine. The exhaust passage defines an exhaust path of exhaust from the gas turbine. The retraction system selectively moves the emission filter between a first location within the exhaust path and a second location out of the exhaust path. In a combined cycle power plant, the first location is upstream of a heat recovery steam generator (HRSG). The systems and filters described allow for temporary positioning of emission filter(s) just downstream of a gas turbine exhaust outlet, or upstream of an HRSG, where provided, for emission reduction at low loads or startup conditions, and removal of the emission filter(s) once operations move to higher loads.

Abstract: Embodiments of emission reduction system including various embodiments of an emission filters for a power plant including a gas turbine are disclosed. The system includes: an emission filter; and a retraction system operably coupled to an exhaust passage of the gas turbine. The exhaust passage defines an exhaust path of exhaust from the gas turbine. The retraction system selectively moves the emission filter between a first location within the exhaust path and a second location out of the exhaust path. In a combined cycle power plant, the first location is upstream of a heat recovery steam generator (HRSG). The systems and filters described allow for temporary positioning of emission filter(s) just downstream of a gas turbine exhaust outlet, or upstream of an HRSG, where provided, for emission reduction at low loads or startup conditions, and removal of the emission filter(s) once operations move to higher loads.

Abstract: An ultra-stable catalyst composition for hydroprocessing hydrocarbon feedstocks and a method of making and use of the ultra-stable catalyst composition. The catalyst composition of the invention comprises a calcined mixture made by calcining a formed particle of a mixture comprising an inorganic oxide material, molybdenum trioxide, and a nickel compound; wherein the calcined mixture is further overlaid with a cobalt component and a molybdenum component to thereby provide the catalyst composition.

Abstract: An amorphous mesoporous alumina having a connectivity (Z) greater than 2.7 is described. The present invention also relates to the process for preparing the said alumina, comprising at least one precipitation step of at least one aluminum salt, at least one heating step of the suspension obtained, a thermal treatment step to form the alumina gel, a gentle drying step or spray drying step, a moulding step of the powder obtained, and a final thermal treatment step in order to obtain the alumina.

Abstract: The present invention relates to a method for hydrogenating aromatic compounds with hydrogen in the presence of a catalyst, in which the catalyst comprises ruthenium on a zirconium oxide support material, and also the use of a catalyst comprising ruthenium on a zirconium oxide support material for hydrogenating aromatic compounds.

Abstract: The invention relates to a process for preparing bulk metal oxide particles comprising the steps of combining in a reaction mixture (i) dispersible nanoparticles having a dimension of less than about 1 ?m upon being dispersed in a liquid, (ii) at least one Group VIII non-noble metal compound, (iii) at least one Group VIB metal compound, and (iv) a protic liquid; and reacting the at least one Group VIII non-noble metal compound and the at least one Group VIB metal in the presence of the nanoparticles. It also relates to bulk metal hydroprocessing catalysts obtainable by such method.

Abstract: There are provided a catalyst composition for producing hydrocarbons and a method for producing hydrocarbons which exhibit a high CO conversion rate, generates minimal amount of gaseous components, and is also capable of efficiently obtaining, from a syngas, a gasoline fraction which is selective for and rich in the components having a high octane number, such as aromatic, naphthenic, olefinic and branched paraffinic hydrocarbons, by using a Fischer-Tropsch synthesis catalyst that contains at least one type of metal exhibiting activity in Fischer-Tropsch reaction and manganese carbonate and a zeolite serving as a solid acid.

Abstract: A supported catalyst useful in processes for chemically refining hydrocarbon feedstocks is prepared, the catalyst comprising a metal from Group 6 of the Periodic Table, a metal from Groups 8, 9 or 10 and optionally phosphorous, wherein the metals, and phosphorous when present, are carried on a foraminous carrier or support, the carrier or support, preferably comprises porous alumina having a total pore volume (TPV) of about 0.6 cc/g to about 1.1 cc/g and comprising: (a) equal to or greater than about 78% to about 95% of TPV in pores having a diameter of less than about 200 Angstroms (?); (b) greater than about 2% to less than about 19% of the TPV in pores having a diameter of about 200 (?) to less than about 1000 ?; (c) equal to or greater than 3% to less than 12% of the TPV in pores having a diameter equal to or greater than about 1000 ?; and (d) a pore mode equal to or greater than about 90 ? and less than about 160 ?. Preferably the support exhibits a d50 greater than about 100 ? and less than about 150 ?.

Abstract: A method of preparing a catalyst precursor comprises contacting a catalyst support material with a tungsten compound, to obtain a tungsten-containing catalyst support material. The tungsten-containing catalyst support material is calcined at a temperature above 900° C. to obtain a modified catalyst support. A precursor compound of an active catalyst component is introduced onto and/or into the modified catalyst support thereby to obtain a catalyst precursor.

Abstract: A process and catalyst are presented for the selective hydrogenation of branched diolefins and acetylenes to olefins. The process uses a catalyst having large pores, and a minimal amount of micropores. The catalyst is designed to have minimal diffusional resistance through the large pores, and to minimize the hydrogenation of olefins to paraffins.

Abstract: The disclosure provides molybdenum and/or tungsten containing catalyst materials useful for the sour gas shift reactions and methods for using such catalyst materials, for example, for converting carbon monoxide and steam to carbon dioxide and hydrogen.

Abstract: The present invention provides catalysts, methods, and reactor systems for converting oxygenated hydrocarbons to oxygenated compounds. The invention includes methods for producing cyclic ethers, monooxygenates, dioxygenates, ketones, aldehydes, carboxylic acids, and alcohols from oxygenated hydrocarbons, such as carbohydrates, sugars, sugar alcohols, sugar degradation products, and the like, using catalysts containing palladium, molybdenum, tin, and tungsten. The oxygenated compounds produced are useful in the production of liquid fuels, chemicals, and other products.

Abstract: The present invention relates to a catalyst composition for conversion of vegetable oils to hydrocarbon products in the diesel boiling range, comprising a porous support; Group III A or VA element in the range of 1-10 wt %; Group VI B elements in the range of 1 to 20 wt %; Group VIII B elements in range of 0.01 to 10 wt %. The present invention further provides the process for preparing the catalyst composition for conversion of vegetable oils to hydrocarbon products in the diesel boiling range. The present invention also provides the process for conversion of vegetable oils to hydrocarbon products in the diesel boiling range using the catalyst composition or discarded refinery spent hydro-treating catalyst.

Abstract: A hydrocarbon conversion process comprises contacting a renewable feedstock under hydroprocessing conditions with a bulk catalyst to form oleochemicals such as fatty alcohols, esters, and normal paraffins. Advantageously, the reaction conditions can be selected to directly convert the renewable feedstock to the desired product(s).

Abstract: An ammonia oxidation catalyst being superior in heat resistance and capable of suppressing by-production of N2O or NOx. The ammonia oxidation catalyst is made by coating at least two catalyst layers having a catalyst layer (lower layer) including a catalyst supported a noble metal on an inorganic base material including any of a composite oxide (A) having at least titania and silica as main components, alumina, and a composite oxide (B) consisting of alumina and silica; and a catalyst layer (upper layer) including a composite oxide (C) consisting of at least silica, tungsten oxide, ceria and zirconia, at the surface of an integral structure-type substrate, wherein a composition of the composite oxide (C) is silica: 20% by weight or less, tungsten oxide: 1 to 50% by weight, ceria: 1 to 60% by weight, and zirconia: 30 to 90% by weight.

Abstract: A high-temperature-resistant component for an exhaust-gas treatment unit, an exhaust-gas treatment unit and a method for producing such a unit, include providing the component or the exhaust-gas treatment unit with a surface layer intended to prevent the formation of chromium carbide bridges during a brazing process for producing the exhaust-gas treatment unit.