Abstract: The exhaust gas-purifying catalyst includes at least one of a first composite oxide represented by a formula A(Al2-xBx)O4 and a second composite oxide represented by a formula (Al2-yCy)O3, wherein element A is a divalent transition metal other than platinum-group elements, each of elements B and C is a transition metal other than platinum-group elements, x satisfies 0<x<2, and y satisfies 0<y<2.

Abstract: A combined hydrocarbon/ozone converter includes a substrate, a metal oxide washcoat and a hydrocarbon converting catalyst, such as platinum. The metal oxide washcoat comprises an ozone reacting component, such as cobalt oxide, and a non-catalytic component, such as aluminum oxide. The weight ratio of the hydrocarbon converting catalyst to the ozone reacting component may be between about 1:5 and about 1:100.

Abstract: A process for the preparation of an F-T catalyst in which the presence of alkaline earth metals is minimized in the support itself and in the processing conditions, in order to provide a catalyst with an alkaline earth metal content of less than 2000 ppm.

Abstract: A catalyst material for use at elevated temperatures is provided. The material can include a plurality of fibers and a plurality of particles supported on the fibers. In addition, a porous layer can cover the plurality of particles and allow for process fluid to come into contact with the particles, and yet retard sintering of the particles at elevated temperatures is present. The plurality of fibers can be a plurality of nanofibers which may or may not be oxide nanofibers. The particles can be metallic nanoparticles and the porous layer can be a porous oxide layer.

Abstract: The present invention provides a method for producing a catalyst for use in preferential carbon monoxide oxidation, which catalyst has a high preferential carbon monoxide oxidation activity and a high methanation activity with respect to the carbon monoxide contained in hydrogen gas, can thus stably reduce the carbon monoxide concentration to an extremely lower level and comprises porous inorganic oxide support particles and, on the basis of the mass thereof, 0.01 to 10 percent by mass of ruthenium and 0.01 to 1 percent by mass of platinum, loaded on the support. The method comprises (1) a step of loading 30 to 70 percent of the total amount of ruthenium to be loaded, on the support particles by a competitive adsorption method and (2) a step of loading the rest of the total amount of ruthenium to be loaded and the total amount of platinum to be loaded, on the ruthenium-loaded support particles produced in step (1) without using a competitive adsorption agent.

Abstract: Precursor cations of A and B elements of an ABO3 perovskite in aqueous solution are formed as an ionic complex gel with citric acid or other suitable polybasic carboxylic acid. The aqueous gel is coated onto a desired catalyst substrate and calcined to form, in-situ, particles of the crystalline perovskite as, for example, an oxidation catalyst on the substrate. In one embodiment, a perovskite catalyst such as LaCoO3 is formed on catalyst supporting cell walls of an extruded ceramic monolith for oxidation of NO in the exhaust gas of a lean burn vehicle engine.

Abstract: Process for the steam reforming of hydrocarbons comprising contacting a feed gas with a catalyst consisting of an active compound in the form of an alloy of nickel and one of iridium, rhodium and ruthenium, on a support comprising alumina, zirconia, magnesia, titania, or combinations thereof.

Abstract: Tungsten carbide catalysts are used in preparation of ethylene glycol by hydrogenating degradation of cellulose. The catalyst includes tungsten carbide as main catalytic active component, added with small amount of one or more transition metals such as nickel, cobalt, iron, ruthenium, rhodium, palladium, osmium, iridium, platinum, and copper as the second metal, supported on one or more porous complex supports such as active carbon, alumina, silica, titanium dioxide, silicon carbide, zirconium oxide, for conversion of cellulose to ethylene glycol. The catalyst realizes high efficiency, high selectivity, and high yield in the conversion of cellulose to ethylene glycol at the temperature of 120-300° C., hydrogen pressure of 1-10 MPa, and hydrothermal conditions. Compared to the existing industrial synthetic method of ethylene glycol using ethylene as feedstock, the invention has the advantages of using renewable raw material resources, environment friendly process, and excellent atom economy.

Abstract: A method for upgrading pyrolysis oil into a hydrocarbon fuel involves obtaining a quantity of pyrolysis oil, separating the pyrolysis oil into an organic phase and an aqueous phase, and then upgrading the organic phase into a hydrocarbon fuel by reacting the organic phase with hydrogen gas using a catalyst. The catalyst used in the reaction includes a support material, an active metal and a zirconia promoter material. The support material may be alumina, silica gel, carbon, silicalite or a zeolite material. The active metal may be copper, iron, nickel or cobalt. The zirconia promoter material may be zirconia itself, zirconia doped with Y, zirconia doped with Sc and zirconia doped with Yb.

Abstract: In the present invention, slurry is formed by mixing noble metal-supported powder particles (3) and a binder (4) with each other in a liquid (Step S1), and the noble metal-supported powder particles (3) are dispersed by applying vibrations to the slurry (Step S2), and thereafter, the slurry is spray dried while keeping a state where the noble metal-supported powder particles (3) are dispersed (Step S3), whereby noble metal-supported powder (1) is produced. In the noble metal-supported powder (1) produced by such a method, pores through which exhaust gas flows are formed appropriately, and accordingly, exhaust gas purification performance can be enhanced.

Abstract: A catalyzed diesel particulate filter (CDPF) and a method for filtering particulates from diesel engine exhaust are provided, where the catalyzed diesel particulate filter includes a substrate and a catalyst composition, where the catalyst composition contains at least one first component, at least one second component, and at least one third component, where the first component is at least one first component selected from the group consisting of cerium and a lanthanide and mixtures thereof, the at least one second component is selected from the group consisting of cobalt, copper, manganese and mixtures thereof; and the third component comprises strontium, where the first component, the second component, and the third component are in an oxide form after calcination. The catalyst on the catalyzed diesel particulate filter lowers the temperature at which particulates are removed from the CDPF by oxidizing the particulates on the filter. The catalyzed diesel particulate filter may also include a washcoat.

Abstract: An exhaust gas purification catalyst includes a substrate, and a first catalyst layer formed on the substrate, the first catalyst layer containing palladium and/or platinum and alumina doped with an alkaline-earth metal element. The exhaust gas purification catalyst has a correlation coefficient ?Al,AE given by the following formula of 0.75 or more: ? Al , AE = C Al , AE ? Al ? ? AE .

Abstract: This invention concerns a procedure for the formation of a bimetallic composition by means of the subsequent depositing of Co(0) and Pd(0) on an inert support, a composition obtained by means of said procedure and the use of said bimetallic composition as a catalyst. Another aspect of this invention is a catalytic device that includes said bimetallic composition.

Abstract: An exhaust gas purifying catalyst (1) is composed of: a noble metal (2); a first compound (3); and a second compound (4). The noble metal (2) is supported on the first compound (3). The exhaust gas purifying catalyst (1) includes units having a structure in which the first compound (3) supporting the noble metal (2) is surrounded by the second compound (4), and the first compound (3) supporting the noble metal (2) is isolated from one another by the second compound (4). The noble metal (2) is one or more selected from [Pt, Pd and Rh], the first compound (3) contains Ti as a main component, and the second compound (4) contains, as a main component, one or more selected from [Al and Si].

Abstract: An exhaust gas purifying catalyst includes a catalyst substrate and a catalyst coating layer containing a noble metal and a refractory inorganic oxide. The catalyst coating layer includes an upstream portion located upstream and a downstream portion located downstream in a flow direction of an exhaust gas. The upstream portion has a layered structure including an upstream portion inside layer containing a cerium-zirconium composite oxide in which a relative proportion of CeO2 is 50 to 95 wt %, as the refractory inorganic oxide and an upstream portion outside layer containing a cerium-zirconium composite oxide in which a relative proportion of ZrO2 is 50 to 95 wt %, as the refractory inorganic oxide. The upstream portion outside layer and the downstream portion contain Rh as the noble metal, and an amount of Rh contained in the upstream portion outside layer is larger than an amount of Rh contained in the downstream portion.

Abstract: One aspect of the present invention relates to a system for remediating emissions using a hybrid oxidation catalyst system. The hybrid oxidation catalyst system includes a noble metal oxidation catalyst having noble metal particles in a first ceramic layer. The system also includes a base metal oxide catalyst disposed in a second ceramic layer situated downstream of the noble metal oxidation catalyst. The noble metal oxidation catalyst is effective to substantially prevent hydrocarbon or carbon monoxide inhibition of the base metal oxide catalyst when enhancing the NO+O2 conversion effectiveness of the base metal oxide catalyst.

Abstract: The present invention aims at providing a catalyst as a porous catalyst body for decomposing hydrocarbons which comprises at least magnesium, aluminum and nickel, wherein the catalyst has an excellent catalytic activity for decomposition and removal of hydrocarbons, an excellent anti-sulfur poisoning property, an excellent anti-coking property even under a low-steam condition, a sufficient strength capable of withstanding crushing and breakage even when coking occurs within the catalyst, and an excellent durability.

Abstract: The present invention provides catalyst compositions useful for transamination reactions. The catalyst compositions have a catalyst support that includes transitional alumina, use a low metal loading (for example, less than 25 wt. %), and do not require the presence of rhenium. The catalyst compositions are able to advantageously promote transamination of a reactant product (such as the transamination of EDA to DETA) with excellent activity and selectivity, and similar to transaminations promoted using a precious metal-containing catalyst.

Abstract: A catalyst for purification of automobile exhaust gas comprising: a support and rhodium supported on the support in an atomic state, wherein an amount of the rhodium supported is 0.05 to 0.30% by mass relative to the total amount of the support and the rhodium, 50 at. % or more of the rhodium is supported on the support as two-atom clusters of rhodium, and an average distance between adjacent ones of the two-atom clusters is 1.0 nm or more.

Abstract: A catalyst for hydrotreating and/or hydroconverting heavy metal-containing hydrocarbon feeds, comprises a support in the form of mainly irregular and non-spherical alumina-based agglomerates the specific shape. The catalyst is prepared by a specific order of steps: crushing, calcining, acidic autoclaving, drying, further calcining and impregnation with catalytic metals.

Abstract: The invention provides a method for manufacturing supported noble metal based alloy catalysts with a high degree of alloying and a small crystallite size. The method involves using polyol solvents as reaction medium and comprises a two-step reduction process in the presence of a support material. In the first step, the first metal (transition metal; e.g. Co, Cr, Ru) is activated by increasing the reaction temperature to 80 to 160° C. In the second step, the second metal (noble metal; e.g. Pt, Pd, Au) is added and the slurry is heated to the boiling point of the polyol solvent in a range of 160 to 300 ° C. The catalysts manufactured according to the method are used as electrocatalysts for polymer electrolyte membrane fuel cells (PEMFC), direct-methanol fuel cells (DMFC) or as gas phase catalysts for CO oxidation or exhaust gas purification.

Abstract: An exhaust gas purifying catalyst includes: rhodium; a zirconium-containing oxide which supports rhodium, and comprises: at least one element selected from the group consisting of calcium, lanthanum, cerium, neodymium and yttrium; and zirconium; and a NOx absorbing material comprising at least one selected from the group consisting of magnesium, barium, sodium, potassium and cesium. A degree of dispersion of rhodium is 20% or more after baking at 900° C. in air for three hours. A method for manufacturing the exhaust gas purifying catalyst includes: mixing the zirconium-containing oxide with water, thereby preparing an aqueous liquid of the zirconium-containing oxide; and supporting rhodium on the zirconium-containing oxide by mixing the aqueous liquid of the zirconium-containing oxide with an aqueous solution of a rhodium salt. A pH of a mixed liquid of the aqueous solution of the rhodium salt and the aqueous liquid of the zirconium-containing oxide is adjusted to 7 or more.

Abstract: The present invention relates to a catalyst for decomposing hydrocarbons including hydrocarbons having 2 or more carbon atoms, comprising magnesium, aluminum, nickel and cobalt as constitutional elements, and further comprising ruthenium and/or palladium, wherein the metallic ruthenium and/or metallic palladium in the form of fine particles have an average particle diameter of 0.5 to 20 nm, and a content of the metallic ruthenium and/or metallic palladium is 0.05 to 5.0% by weight based on the weight of the catalyst. The catalyst of the present invention is capable of efficiently decomposing hydrocarbons including hydrocarbons having 2 or more carbon atoms (C2 or more hydrocarbons), is less expensive, and exhibits an excellent catalytic activity for decomposition and removal of hydrocarbons, in particular, an excellent capability of decomposing propane, and an excellent anti-coking property.

Abstract: The invention is directed to iridium oxide based catalysts for use as anode catalysts in PEM water electrolysis. The claimed composite catalyst materials comprise iridium oxide (IrO2) and optionally ruthenium oxide (RuO2) in combination with a high surface area inorganic oxide (for example TiO2, Al2O3, ZrO2 and mixtures thereof). The inorganic oxide has a BET surface area in the range of 50 to 400 m2/g, a water solubility of lower than 0.15 g/l and is present in a quantity of less than 20 wt. % based on the total weight of the catalyst. The claimed catalyst materials are characterized by a low oxygen overvoltage and long lifetime in water electrolysis. The catalysts are used in electrodes, catalyst-coated membranes and membrane-electrode-assemblies for PEM electrolyzers as well as in regenerative fuel cells (RFC), sensors, and other electrochemical devices.

Abstract: To provide a catalyst for treating exhaust gases containing nitrogen monoxide, carbon monoxide and volatile organic compounds whose oxidation power has been enhanced without increasing the amount of precious metal supported thereon; a method for producing the same; and a method for treating exhaust gases. A catalyst for treating exhaust gases, including coat layers made up of a plurality of layers, an upper layer of which has an active component contained uniformly therein and a lower layer of which has no active component contained therein, can be obtained through the steps of: forming the lower layer by coating the surface of substrate with a slurry of a porous inorganic compound, followed by drying; and forming the upper layer, which is to be the top surface of the catalyst, by coating the surface of the lower layer with a slurry of a porous inorganic compound that has the active component composed of one or more precious metals supported thereon, followed by drying.

Abstract: A nano-particle comprising: an interior region comprising a mixed-metal oxide; and an exterior surface comprising a pure metal. In some embodiments, the mixed-metal oxide comprises aluminum oxide and a metallic pinning agent, such as palladium, copper, molybdenum, or cobalt. In some embodiments, the pure metal at the exterior surface is the same as the metallic pinning agent in the mixed-metal oxide in the interior region. In some embodiments, a catalytic nano-particle is bonded to the pure metal at the exterior surface. In some embodiments, the interior region and the exterior surface are formed using a plasma gun. In some embodiments, the interior region and the exterior surface are formed using a wet chemistry process. In some embodiments, the catalytic nano-particle is bonded to the pure metal using a plasma gun. In some embodiments, the catalytic nano-particle is bonded to the pure metal using a wet chemistry process.

Abstract: A composition and method for preparation of a catalyst for the liquid phase selective hydrogenation of alkynes to alkenes with high selectivity to alkenes relative to alkanes, high alkyne conversion, and sustained catalytic activity comprising a Group VIII metal and a Group IB, Group IIB, Group IIIA, and/or Group VIIB promoter on a particulate support.

Abstract: There is described Pd enriched diesel oxidation catalysts and their application as catalysts for the oxidation of CO and HC emissions from a compression ignition/diesel engine. The catalysts are characterized by increased performance and hydrothermal durability these goals being achieved by employing a layered design to eliminate low temperature catalyst quenching by toxic HC species in the exhaust stream.

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

Abstract: A catalyst is provided comprising nickel in a reduced valence state on a carrier comprising zinc oxide and alumina, wherein the Zn:Ni atomic ratio is at least 12, and the catalyst particles are prepared by: mixing zinc oxide in the form of a powder and alumina or an alumina precursor in the form of a powder; peptizing the powder mixture and forming an extrudable dough by adding acid and water to the powder mixture in such amounts that the dough contains 0.8-1.2 moles acid equivalents per kg powder; extruding the extrudable dough to form extrudates; drying and calcining the extrudates; impregnating the extrudates with an aqueous solution of a nickel compound; drying, calcining and reducing the impregnated extrudates. Further provided is a process for desulphurization of a hydrocarbonaceous feedstock using such catalyst.

Abstract: The present invention relates to a porous catalyst body for decomposing hydrocarbons, comprising a porous composite oxide comprising at least magnesium and/or calcium, and aluminum, and metallic nickel having a particle diameter of 1 to 25 nm, wherein the porous catalyst body has an average crushing strength of not less than 5 kgf and a displacement length of not less than 0.05 mm as measured by compressing the porous catalyst body under a load of 5 kgf. The porous catalyst body for decomposing hydrocarbons according to the present invention is less expensive, and has an excellent catalytic activity for decomposition and removal of hydrocarbons, an excellent anti-sulfur poisoning property, a high anti-coking property even under a low-steam condition, a crushing strength and a displacement length which are optimum for DSS operation, and an excellent durability.

Abstract: A particulate desulfurization material includes one or more nickel compounds, a zinc oxide support material, and one or more alkali metal compounds wherein the nickel content of the material is in the range 0.3 to 10% by weight and the alkali metal content of the material is in the range 0.2 to 10% by weight. A method of making the desulfurization material includes the steps: (i) contacting a nickel compound with a particulate zinc support material and an alkali metal compound to form an alkali-doped composition, (ii) shaping the alkali-doped composition, and (iii) drying, calcining, and optionally reducing the resulting material. The desulfurization material may be used to desulfurize hydrocarbon gas streams with reduced levels of hydrocarbon hydrogenolysis.

Abstract: A method for forming a cobalt-containing Fischer-Tropsch catalyst involves precipitating a cobalt oxy-hydroxycarbonate species by turbulent mixing, during which a basic solution collides with an acidic solution comprising cobalt. The method further involves depositing the cobalt oxy-hydroxycarbonate species onto a support material to provide a catalyst comprising cobalt and the support material. The support material comprises one or more of alumina, silica, magnesia, titania, zirconia, ceria-zirconia, and magnesium aluminate.

Abstract: A selective hydrogenation catalyst, with alumina as carrier, and palladium as active component that distributed on the surface of the carrier in an egg-shell form, characterized in that: provided that the catalyst is weighed 100%, it comprises 0.2-0.5 wt % active component Pd, 2-8 wt % aids lanthanum and/or cerium, and 2-8 wt % alkaline earth metal. The specific surface area of the catalyst is 70-150 m2/g, the pore volume is 0.3-0.6 ml/g, and the crystal form of the carrier may be ? form or ?, ? mixed form mainly composed of ? form. The catalyst is suitable for the selective hydrogenation of medium or low distillate oil, especially for the first stage selective hydrogenation of pyrolysis gasoline. The catalyst has good hydrogenation performance, and can keep good hydrogenation activity and stability especially under the condition that the feed contains a small quantity of water, and the content of colloid, arsenic, and diolefin is higher.

Abstract: According to at least one aspect of the present invention, a urea-resistant catalytic unit is provided. In at least one embodiment, the catalytic unit includes a catalyst having a catalyst surface, and a urea-resistant coating in contact with at least a portion of the catalyst surface, wherein the urea-resistant coating effectively reduces urea-induced deactivation of the catalyst. In at least another embodiment, the urea-resistant coating includes at least one oxide from the group consisting of titanium oxide, tungsten oxide, zirconium oxide, molybdenum oxide, aluminum oxide, silicon dioxide, sulfur oxide, niobium oxide, molybdenum oxide, yttrium oxide, nickel oxide, cobalt oxide, and combinations thereof.

Abstract: The present invention relates to a nickel-based catalyst using hydrotalcite-like precursor and a steam reforming reaction by using the catalyst, and particularly to a nickel-based catalyst prepared by dispersing nickel uniformly onto the inner part and the surface of the support through a substitution between the magnesium and the active nickel metal and optimizing the molar ratios of nickel, magnesium and aluminum in order to utilize nickel as an active metal and a hydrotalcite-like precursor consisting of aluminum and magnesium, which shows an increased specific surface area of the catalyst and surface area of the active nickel, and thus enables the production of hydrogen-rich gas in high yield during the steam reforming reaction of LPG with superior maintenance of catalytic activity for a long period of time due to the inhibition of carbon deposition.

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

Abstract: The invention provides a catalyst composition composed of a support portion and a catalyst portion. The support portion includes an acidic mixed metal oxide including a transitional alumina and a second metal oxide. The transitional alumina can comprise delta or theta alumina, in combination with other transitional phases, or an alpha or gamma alumina. The second metal oxide has a weight percentage that is less than the weight percentage of alumina. The catalyst portion is 25 weight percent or less of the catalyst composition and is composed of nickel and rhenium. The catalyst portion includes nickel in an amount in the range of 2 to 20 weight percent, based upon total catalyst composition weight, and there is no boron in the catalyst portion.

Abstract: A catalyst for purifying exhaust gas in vehicles may include a precious metal and porous structures that serve as a supporting material for the precious metal. The porous structures are comprised of a plurality of channels which are connected with each other by a plurality of bridges. The channels may have multiple entrances that allow reactants to pass through and react with the precious metal.

Abstract: A hydrocarbon-reforming catalyst comprising a composite oxide having a composition represented by the following formula (I) in which Co, Ni and M are dispersed in the composite oxide and a process for producing a synthesis gas by using the catalyst are provided. aM.bCo.cNi.dMg.eCa.fO??(I) wherein a, b, c, d, e, and f are molar fractions, a+b+c+d+e=1, 0.0001<a?0.20, 0<b?0.20, 0?c?0.20, 0.001<(b+c)?0.20, 0.60?(d+e)?0.9989, 0<d<0.9989, 0<e<0.9989, f=the number necessary for element to keep charge equilibrium with oxygen. And M is at least one element among Group 3B elements and Group 6A elements in the Periodic Table. The reforming catalyst is able to maintain a high catalytic activity over a long period in reforming hydrocarbons.

Abstract: A process for the treatment of an olefinic fraction, using a catalyst prepared by a process comprising: a) The preparation of a colloidal oxide suspension of a first metal M1 by the neutralization of a basic solution by an acidic mineral solution that contains the precursor of the metal M1, b) Bringing into contact the precursor of the promoter M2, either directly in its crystallized form or after dissolution in aqueous phase, with the colloidal suspension that is obtained in stage a), c) Bringing into contact the colloidal suspension that is obtained in stage b) with the substrate, d) Drying at a temperature of between 30° C. and 200° C., under a flow of air.

Abstract: Catalytic system comprising at least two components: a catalyst for the hydrolysis reaction of metal borohydrides to hydrogen; and a material in solid form, the dissolution reaction of which in water is exothermic.

Abstract: A sol includes metal oxide nanoparticles dispersed in an aqueous liquid, and further includes stabilizer ions. The metal oxide particles include one or more metals selected from a first group consisting of cerium, zirconium, iron, manganese and titanium, and one or more metals selected from a second group consisting of platinum, palladium, rhodium, ruthenium, iridium and osmium. The sols can be used to deposit catalytic coatings onto catalyst substrates, including substrates with narrow channels (i.e. channels with a diameter of less than 500 ?m).

Abstract: A core-shell catalyst material can include a core and a shell material. Each of the core material and the shell material can have crystal structures and lattice parameters which allow for a substantially coherent core-shell interface. The shell material can include a catalytically active metal. The circumferential stress of the shell material, ???, at the core-shell interface and at the shell surface, is greater than 0 (tensile) or can be compressive of a lower magnitude than a catalyst made of the shell material alone. The crystal structures of the core material can often be the same as the shell material, although this is not always required.

Abstract: A high heat-resistant catalyst includes: noble metal particles; first compounds which contact the noble metal particles and suppress movement of the noble metal particles; and second compounds which envelop the noble metal particles and the first compounds, suppress the movement of the noble metal particles, and suppress coagulation of the first compounds following mutual contact of the first compounds. The first compounds support the noble metal particles, and single piece or aggregate of the first compounds supporting the noble metal particles are included in a section partitioned by the second compounds. A coefficient of linear thermal expansion of the second compounds is 1.2×10?5 [K?1] or less.

Abstract: The invention relates to a multilayer catalyst for the partial oxidation of hydrocarbons in gaseous phase, comprising a monolithic ceramic or metallic substrate having a solid macroporous structure consisting of one or more structures, on which a first active layer with a crystal-line perovskitic structure is deposited, having general formula AxA? 1-xByB? 1-YO3±? wherein: A is a cation of at least one of the rare earth elements, A? is a cation of at least one element selected from groups Ia, IIa and VIa of the periodic table of elements, B is a cation of at least one element selected from groups IVb, Vb, VIb, VIIb, or VIII of the periodic table of elements, B? is a cation of at least one element selected from groups IVb, Vb, VIb, VIIb or VIII of the periodic table of elements Mg2+ or Al3+, x is a number which is such that 0?x?1, y is a number which is such that 0?y?1, and ? is a number which is such that 0???0, 5, a second more external active layer consisting of a dispersion of a noble metal and a possible s

Abstract: A catalyst for treating an exhaust gas has at least a carrier and plural layers formed on the carrier, wherein at least one layer of the above plural layers has an interstice in the layer, and at least one layer of the above plural layers contains a catalyst component. The above catalyst for treating an exhaust gas allows the enhancement of the diffusion of an exhaust gas in a catalyst layer, which results in the improvement of catalyst efficiency.

Abstract: Highly uniform cluster based nanocatalysts supported on technologically relevant supports were synthesized for reactions of top industrial relevance. The Pt-cluster based catalysts outperformed the very best reported ODHP catalyst in both activity (by up to two orders of magnitude higher turn-over frequencies) and in selectivity. The results clearly demonstrate that highly dispersed ultra-small Pt clusters precisely localized on high-surface area supports can lead to affordable new catalysts for highly efficient and economic propene production, including considerably simplified separation of the final product. The combined GISAXS-mass spectrometry provides an excellent tool to monitor the evolution of size and shape of nanocatalyst at action under realistic conditions. Also provided are sub-nanometer gold and sub-nanometer to few nm size-selected silver catalysts which possess size dependent tunable catalytic properties in the epoxidation of alkenes.

Abstract: A catalyst composition comprising cobalt as an active catalytic element and a lesser amount of nickel as a promoter supported on a metal oxide support. The support may comprise alumina, silica, silica-alumina, zeolite, zirconia, magnesia or titania. The amount of nickel is preferably less than 50 wt %, relative to the amount of cobalt.

Abstract: A process for preparing supported catalyst in pellet or coated monolith form is disclosed the method includes the steps of: forming a mixed metal carbonate complex having at least two metals by subjecting a first metal carbonate containing compound to ion exchange with desired metal cations; heat treating the resulting mixed metal carbonate complex to form a mixed oxide which consists of active metal oxides supported on a catalyst support; forming the resulting supported catalysts into pellets or coating the resulting supported catalyst onto a monolithic support. The catalysts may be used for treating effluents containing organic material in the presence of an oxidising agent.