Abstract: A catalyst for FT synthesis which, in the FT method, is high in a CO conversion and small in the formation of a gaseous component and can stably perform an FT synthesis reaction and enhance the productivity of hydrocarbons, and a method for producing hydrocarbons using the catalyst, are provided. A catalyst for Fischer-Tropsch synthesis comprising a support containing manganese carbonate as a main component, wherein the support contains at least one metal having an activity to the Fischer-Tropsch reaction; and a method for producing hydrocarbons using this catalyst.

Abstract: New photocatalytic product comprising compounds of titanium integrated with limestone. The product is obtained by reacting limestone with a suitable precursor of titanium dioxide in a basic solution, recovering the product in particular conditions, drying it and calcining it. By operating in presence of sodium, a composite is obtained substantially free from titanium dioxide, containing limestone and calcium titanate. The composite thus obtained, used as such or in mixture with other components, has shown an unexpectedly high photocatalytic activity.

Abstract: The present invention relates to a catalyst composition for polymerising olefin monomers to polyolefins comprising a catalyst component and a first additive component. The first additive component is a fossil and may for example be obtained from coal.

Abstract: The present invention discloses a process for producing a nano calcium carbonate slurry from a feedstock of waste gypsum, wherein: an aqueous gypsum slurry of the feedstock is mixed with ammonia water by stirring; with CO2 injected in the slurry is under continuous stirring until the calcium sulfate in the waste gypsum is completely carbonated into nano calcium carbonate; after filtration, the filter cake is dispersed in water to obtain the nano calcium carbonate slurry. This process is easy to operate and to obtain a low-cost and a lower decomposition temperature of calcium carbonate. The present invention also discloses a nano calcium carbonate slurry and its application in preparation of a CaO-based carbon dioxide adsorbent and complex catalyst used for a reactive sorption enhanced reforming process for hydrogen production from methane.

Abstract: A carbon catalyst which has high catalytic activity and can achieve high catalyst performance is provided. The carbon catalyst comprises nitrogen. The energy peak area ratio of the first nitrogen atom whose electron in the 1s orbital has a binding energy of 398.5±1.0 eV to the second nitrogen atom whose electron in the 1s orbital has a binding energy of 401±1.0 eV (i.e., the value of (the first nitrogen atom)/(the second nitrogen atom)) of the nitrogen introduced into the catalyst is 1.2 or less.

Abstract: An exhaust gas-purifying catalyst includes first particles of oxygen storage material, second particles of one or more alkaline-earth metal elements and/or compounds thereof interposed between the first particles, and third particles of one or more precious metal elements interposed between the first particles. A spectrum of a first characteristic X-ray intensity for one of the one or more alkaline-earth metal elements and a spectrum of a second characteristic X-ray intensity for one of the one or more precious metal elements that are obtained by performing a line analysis using energy-dispersive X-ray spectrometry along a length of 500 nm have a correlation coefficient ?(AE,PM) of 0.70 or more.

Abstract: A catalyst unit is described comprising a cylinder with a length C and a diameter D, wherein said unit has five holes arranged in a pentagonal pattern extending longitudinally therethrough, with five flutes running along the length of the unit, said flutes positioned equidistant adjacent holes of said pentagonal pattern. The catalyst may be used particularly in steam reforming reactors.

Abstract: Present disclosure provides a process for the synthesis of doped titania nanoparticle having photocatalytic activity greater than 90% at 2 hours under sunlight irradiation. The process involves step a) milling a mixture containing anatase titania and a precursor compound, the compound selected from the group consisting of metal and non-metal salts, in the presence of water and oxide milling media, at a temperature in the range of 20 to 50° C. for a period of 60-120 minutes, to form a slurry, wherein the amount of water is in the range of 15 to 25% by weight of the total mixture; and b) filtering the slurry to separate the oxide milling media and obtain a filtrate containing doped titania nanoparticles.

Abstract: An air cathode for a metal-air battery is disclosed which contains a catalyst chosen to make the metal air battery more easily rechargeable. This catalyst is based on cobalt phosphate, cobalt borate mixed metal cobalt phosphates, mixed metal cobalt borates, or mixed metal cobalt phosphate borates.

Abstract: A catalyst unit is described in the form of a cylinder having a length C and diameter D, which has one or more holes extending therethrough, wherein said cylinder has domed ends of lengths A and B, such that (A+B+C)/D is in the range 0.50 to 2.00, and (A+B)/C is in the range 0.40 to 5.00. The catalyst or catalyst unit preferably has one or more flutes miming along its length. The catalyst may be used particularly in steam reforming reactors.

Abstract: A catalyst unit is described in the form of a cylinder having a length C and diameter D, which has two or more flutes running along its length, wherein said cylinder has domed ends of lengths A and B, such that (A+B+C)/D is in the range 0.50 to 2.00, and (A+B)/C is in the range 0.40 to 5.00. The catalyst may be used particularly in reactions where hydrogen is a reactant such as hydroprocessing, hydrogenation, water-gas shift reactions, methanation, hydrocarbon synthesis by the Fischer-Tropsch reaction, methanol synthesis and ammonia synthesis.

Abstract: Aspects of the invention relate to a catalyst system for the conversion of biomass material. In an exemplary embodiment, the catalyst system has a specific combined mesoporous and macroporous surface area in the range of from about 1 m2/g to about 100 m2/g. The catalyst system can be used in a two-stage reactor assembly unit for the catalytic thermoconversion of biomass material wherein the thermolysis process and the catalytic conversion process are optimally conducted separately.

Abstract: A process for producing geometric shaped catalyst bodies K whose active material is a multielement oxide which comprises the element Mo, the elements Bi and/or V and one or more of the elements Co, Ni, Fe, Cu and alkali metals, in which sources of the different elements are used to obtain a finely divided mixture which is coarsened to a powder by press agglomeration, the coarsened powder is used to form, by press agglomeration, shaped bodies V which are separated into undamaged shaped bodies V+ and into damaged shaped bodies V?, the undamaged shaped bodies V+ are converted by thermal treatment to the shaped catalyst bodies K, and the damaged shaped bodies V? are comminuted and recycled into the obtaining of the finely divided mixture.

Abstract: The present invention relates to processes for producing ethanol using a catalyst comprising rhodium and tin on a support. The rhodium and tin may be present in a molar ratio of 20:80 to 80:20.

Abstract: A method for the preparation of an eggshell catalyst is described comprising the steps of i) immersing shaped units of an oxidic support having a smallest unit dimension ?0.5 mm in a solution of cobalt ammine carbonate, ii) heating the solution to a temperature between 60 and 120° C. to precipitate cobalt compounds onto the surface of the shaped units, iii) separating the resulting supported cobalt compounds from the remaining solution, and iv) drying the supported cobalt compounds. The cobalt compounds may be reduced to provide catalysts suitable for the hydrogenation of unsaturated compounds or the Fischer-Tropsch synthesis of hydrocarbons.

Abstract: Provided is a liquid combustion catalyst composition comprising an ionized metal compound, and more particularly, to a liquid combustion catalyst composition comprising an ionized metal compound, in which the ionic metal compound is added to fuel burning in a combustion engine to quickly achieve a chemical thermal equilibrium condition required for the combustion of fuel such as hydrocarbon fuel, fossil fuel and biomass, and to optimize the amount of air which contains oxygen required for the equilibrium condition in terms of chemical equivalence, thereby improving thermal efficiency and the efficiency of the combustion engine so that fuel consumption for a heat source can be reduced, and optimizing the combustion performed by the combustion device by controlling the generation of sludge, clinker and fouling which may be generated due to an inorganic substance so that a combustion rate per unit area and the productivity of the combustion device can be improved.

Abstract: Disclosed herein are titania photocatalysts, titania photocatalytic compositions, and methods of making the same. The photocatalysts may, for example, be represented by the formula of (Ti1-rMr)(O2-x-yCxNy), where M, r, x, are y defined in the specification. The photocatalysts may, in some embodiments, provide superior photocatalytic activity relative to titania. Also disclosed are methods making the photocatalysts. The method may provide economical techniques for obtaining the titania photocatalysts.

Abstract: A reduced metallic catalyst or pre-activated catalyst is formed by contacting a precursor catalyst or a reduced metallic catalyst with a modifier solution in the presence of a source of hydrogen and heat treating the precursor catalyst or the reduced metallic catalyst at super-atmospheric pressure to obtain the reduced metallic catalyst from the precursor catalyst or the pre-activated catalyst from the reduced metallic catalyst. A method of hydrogenating a hydrogenatable precursor includes providing a reduced metallic catalyst or the pre-activated catalyst prepared with modifier buffer and contacting the reduced metallic catalyst or pre-activated catalyst with the hydrogenatable precursor in the presence of hydrogen and, optionally, in the presence of a modifier solution.

Abstract: A batch composition for making a highly porous honeycomb ceramic catalytic filter article, including base inorganic components including a mixture of a nano-zeolite powder, and an inorganic filler, in amounts defined herein; and super additives including: a mixture of at least two pore formers; a binder; and a metal salt, in amounts defined herein. Also disclosed are extruded catalyst filter articles and methods for making the articles.

Abstract: The proposed methods are exemplarily utilized in uranium hydrometallurgy for selective extraction of uranium out of ore by in situ or heap leaching. According to the disclosure, the methods encompass catalytic oxidation of U4+ to U6+ using a proposed oxidizing catalyst “Muhamedzhan-1”, filtration of this solution through ore, transferring hexavalent uranium, trivalent iron, and other metal ions into a production solution, extraction of uranium yielding a barren solution and re-circulation of this solution back for ore leaching. The methods essentially improve known technologies by employing “Muhamedzhan-1”, being a solution of d- and f-mixed valence metal salts (MLn, wherein M=Fe, U, Cu, Mn, and L=NO3?, SO42?Cl?, Br?, I?) and alkali metal halogenides (MX, wherein M=Na+, Na+, K+, and X=Cl?, Br?, I?) used as an oxidizing agent, with the weight ratio of MLn: 0.01-25.0%, MX: 0.01-12.5%, and solvent: balance.

Abstract: The present invention relates to a catalyst for preparing a carbon nanotube having desired apparent density by controlling the adding amount of co-precipitating agent in the process of preparing a catalyst in order to obtain a catalyst having a minimized particle size. More specifically, this invention relates to a catalyst for preparing carbon nanotube having desired apparent density based upon the reverse-correlation between the amount of co-precipitating agent added in the process of preparing catalyst and the apparent density of catalyst. The carbon nanotube prepared by the catalyst having low apparent density shows excellent electrical conductivity and highly uniformed dispersion in the polymer/carbon nanotube composite.

Abstract: A catalyst comprising a physical mixture of particles of a catalytic material and particles of char is provided. The catalyst can be used in various processes, including the reforming of tars present in syngas generated during biomass gasification. The catalyst is produced through a mechanical mixing of the catalytic material and char particles, which results in significant time and energy savings over methods of catalyst preparation that involve impregnation and calcining of a support material.

Abstract: A supported catalyst includes a plurality of support particles that each include a carbon support and a layer disposed around the carbon support. The layer is selected from a metal carbide, metal oxycarbide, and combinations thereof. A catalytic material is disposed on the layers of the support particles.

Abstract: CO2 capture from flue gas is a costly procedure, usually due to the energy required for regeneration of the capture medium. One potential medium which could reduce such an energy consumption, however, is Na2CO3. It has been well studied as a sorbent, and it is understood that the theoretical energy penalty of use of Na2CO3 for CO2 separation is low, due to the relatively low heat of reaction and low heat capacity of the material. While it offers some advantages over other methods, its primary downfall is the slow reaction with CO2 during adsorption and the slow Na2CO3 regeneration process. In an effort to reduce the energy penalty of post-combustion CO2 capture, the catalytic decomposition of NaHCO3 is studied. Nanoporous TiO(OH)2 is examined as a potential catalytic support for a cyclic Na2CO3/NaHCO3 based CO2 capture process.

Abstract: Provided is a process for producing a fuel cell electrode catalyst having high catalytic activity which uses a transition metal, e.g., titanium, which process comprises thermal treatment at relatively low temperature, i.e., not including thermal treatment at high temperature (calcining) step. The process for producing a fuel cell electrode catalyst comprises a step (1) of mixing at least a transition metal-containing compound, a nitrogen-containing organic compound and a solvent to provide a catalyst precursor solution; a step (2) of removing the solvent from the catalyst precursor solution; and a step (3) of thermally treating a solid residue obtained in the step (2) at a temperature of 500 to 1100° C. to provide an electrode catalyst; wherein the transition metal-containing compound is partly or wholly a compound comprising at least one transition metal element (M1) selected from the group 4 and 5 elements of the periodic table as a transition metal element.

Abstract: A bi-laterally surfaced substrate in which the first surface consists of one or more than one of cerium oxide, aluminum oxide, tin oxide manganese oxide, copper oxide, cobalt oxide, nickel oxide, praseodymium oxide, terbium oxide, ruthenium, rhodium, palladium, silver, iridium, platinum and gold and the second surface consists of one or more than one of ruthenium, rhodium, palladium, silver, iridium, platinum and gold and micro channel micro component reactors including such substrates in a predetermined formed shape and methods for making the same utilizing a thermal spray on one side and a physical deposition process on the other side.

Abstract: The present invention relates to a method for producing propylene oxide, comprising a step of bringing propylene, oxygen and a silver catalyst into contact with each other in the presence of water, wherein the silver catalyst is a catalyst prepared from (a) metallic silver, a silver compound or a mixture thereof, (b) phosphorus, a phosphorus-containing compound or a mixture thereof and (c) a carrier.

Abstract: The present invention relates to a method of producing propylene oxide, comprising a step of reacting propylene and oxygen in the presence of a silver catalyst and water, wherein the silver catalyst is a catalyst prepared from (a) metallic silver, a silver compound or a mixture thereof, (b) a tellurium compound and (c) a carrier.

Abstract: The invention describes the preparation of electrocatalysts, both anodic (aimed at the oxidation of the fuel) and cathodic (aimed at the reduction of the oxygen), based on mono- and plurimetallic carbon nitrides to be used in PEFC (Polymer electrolyte membrane fuel cells), DMFC (Direct methanol fuel cells) and H2 electrogenerators. The target of the invention is to obtain materials featuring a controlled metal composition based on carbon nitride clusters or on carbon nitride clusters supported on oxide-based ceramic materials. The preparation protocol consists of three steps. In the first the precursor is obtained through reactions of the type: a) sol-gel; b) gel-plastic; c) coagulation-flocculation-precipitation.

Abstract: A method for treating a supported catalyst includes establishing shell-removal conditions for a supported catalyst that includes nanoparticles of a catalyst material on a carbon support. The nanoparticles each include a platinum alloy core capped in an organic shell. The shell-removal conditions include an elevated temperature and an inert gas atmosphere that is substantially free of oxygen. The organic shell is then removed from the platinum alloy core in the shell-removal conditions.

Abstract: A method of forming a product from an oil feedstock, such as a biodiesel product, and a heterogeneous catalyst system used to form said product is disclosed. This catalyst system, which has a high tolerance for the presence of water and free fatty acids (FFA) in the oil feedstock, may simultaneously catalyze both the esterification of FAA and the transesterification of triglycerides present in the oil feedstock. The catalyst system is comprised of a mixture of zinc oxide and a second metal oxide. The zinc oxide includes a mixture of amorphous zinc oxide and zinc oxide nanocrystals, the zinc nanocrystals having a mean grain size between about 20 and 80 nanometers with at least one of the nanocrystals including a mesopore having a diameter of about 5 to 15 nanometers. Preferably, the second metal oxide is a lanthanum oxide, the lanthanum oxide being selected as one from the group of La2CO5, LaOOH, and combinations or mixtures thereof.

Abstract: An oxidation catalyst, comprising a carbon material prepared by calcining a transition metal compound and a nitrogen-containing organic substance, or a transition metal compound, a nitrogen-containing organic substance, and a carbon compound not containing nitrogen, the oxidation catalyst oxidizing at least one target substance selected from the group consisting of NO, CO, NH3, and an aromatic hydrocarbon.

Abstract: Cellulose and hemicellulose from biomass can be broken down to C6 and C5 sugars and further converted to corresponding sugar alcohols. It is now found that a new catalyst, MoS2, is active for the hydrogenation of sugar alcohols to hydrocarbons. Combining the technologies listed above allows us to convert the cellulose/hemicellulose to liquid hydrocarbons.

Abstract: The present invention relates to a sulphided multi-metallic catalyst, the process for obtaining it by sulphidation of a multi-metallic solid and use thereof in a process for producing higher alcohols (C2+), mainly ethanol, through the catalytic conversion of synthesis gas.

Abstract: A precipitated film and the fabricating method thereof are disclosed. The precipitated film includes a supporting layer having columnar crystals, and a functional layer formed on the supporting layer and having granular crystals. The precipitated film is fabricated by phase-changing one of two aqueous solutions, which are able to react with each other to form a solid precipitate inherently, into solid-state and then reacting with the other aqueous solution to form the precipitated film by a precipitation reaction.

Abstract: The present invention provides methods for controlling defects in materials, including point defects, such as interstitials and vacancies, and extended defects, including dislocations and clusters. Defect control provided by the present invention allows for fabrication and processing of materials and/or structures having a selected abundance, spatial distribution and/or concentration depth profile of one or more types of defects in a material, such as vacancies and/or interstitials in a crystalline material. Methods of the invention are useful for processing materials by controlling defects to access beneficial physical, optical, chemical and/or electronic properties.

Abstract: The methods of the disclosure may be used for the fluorination of organic compounds, and in particular aryl organic compounds other than just benzyl halogens. It is within the scope of the present disclosure, for organic compounds comprising an electrophilic carbon atom and a halogen leaving group to be fluorinated by the methods of the disclosure. One aspect of the disclosure provides methods of introducing a fluorine atom onto an electrophilic carbon atom, comprising mixing an insoluble basic silver salt, an organic molecule containing a leaving group, an aqueous solution of hydrofluoric acid, and a polar solvent:water composition; incubating said mixture at a temperature of about 20° C. to about 35° C., thereby obtaining a fluorinated organic product.

Abstract: This invention provides processes for forming solution compositions, which processes comprises bringing together, in an aqueous medium, i) at least one phosphorus compound; ii) at least one Group VI metal compound; and iii) at least one Group VIII metal compound, such that a solution having a Group VI metal concentration of more than about 5.6 mol/L is formed. Also provided are compositions formed by such processes, processes for forming catalyst compositions from these compositions, and catalyst compositions formed by these processes.

Abstract: The present invention relates to petrochemistry, gas chemistry, coal chemistry, particularly the invention relates to a catalyst for synthesis of hydrocarbons from CO and H2 and a preparation method thereof. The catalyst is pelletized and comprises at least Raney cobalt as active component in an amount of 1-40% by weight based on the total weight of the catalyst, metallic aluminium in an amount of 25-94% by weight based on the total weight of the catalyst and a binder in an amount of 5-30% by weight based on the total weight of the catalyst. The present invention provides the catalyst stability to overheating and high productivity of hydrocarbons C5-C100 for synthesis of hydrocarbons from CO and H2.

Abstract: The invention provides catalysts that are not corroded in acidic electrolytes or at high potential and have excellent durability and high oxygen reducing ability. The catalyst includes a metal element M, carbon, nitrogen and oxygen, wherein the catalyst shows peaks at 1340 cm?1 to 1365 cm?1 and at 1580 cm?1 to 1610 cm?1 as analyzed by Raman spectroscopy and the metal element M is one selected from titanium, iron, niobium, zirconium and tantalum. The catalysts of the invention are stable and are not corroded in acidic electrolytes or at high potential, have high oxygen reducing ability and are inexpensive compared to platinum. Fuel cells having the catalysts are therefore relatively inexpensive and have high performance.

Abstract: The invention describes the preparation of electrocatalysts, both anodic (aimed at the oxidation of the fuel) and cathodic (aimed at the reduction of the oxygen), based on mono- and plurimetallic carbon nitrides to be used in PEFC (Polymer electrolyte membrane fuel cells), DMFC (Direct methanol fuel cells) and H2 electrogenerators. The target of the invention is to obtain materials featuring a controlled metal composition based on carbon nitride clusters or on carbon nitride clusters supported on oxide-based ceramic materials. The preparation protocol consists of three steps. In the first the precursor is obtained through reactions of the type: a) sol-gel; b) gel-plastic; c) coagulation-flocculation-precipitation. The second step consists of the thermal treatments to decompose the precursors in an inert atmosphere leading to the production of the carbon nitrides. In the last step the chemical and electro-chemical activation of the electrocatalysts is performed.

Abstract: An exhaust gas-purifying catalyst includes a substrate, and a catalytic layer supported by the substrate. The catalytic layer includes a support made of alumina, an oxygen storage material, an alkaline earth metal and/or a compound of alkaline-earth metal selectively supported by a surface of the support and dispersed on the surface of the support, and a precious metal supported by the surface of the support. A ratio of a number of moles of the alkaline-earth metal in the catalytic layer with respect to a volumetric capacity of the exhaust gas-purifying catalyst falls within a range of 0.0004 mol/L to 0.35 mol/L.

Abstract: A catalyst for reforming a hydrocarbon gas using carbon dioxide and/or water vapor to react while restraining the deposition of carbon contains a NiO—Sr2TiO4 solid solution in which NiO is dissolved in Sr2TiO4. The ratio of NiO in the NiO—Sr2TiO4 solid solution is preferably of 2.2 to 13.5 parts by mol relative to 100 parts by mol of Sr2TiO4. A catalyst which can contain SrTiO3, SrCO3, and fine grains of Ni and/or NiO are also described. A method of manufacturing the same, and a method of manufacturing a synthesized gas.

Abstract: A photocatalytic metal deposition process and a resulting nanocomposite are described. The nanocomposite includes an electrically conducting carbonaceous material, a photoactive metal oxide and a metal. Metals for deposition include noble metals, metal alloys and other transition metals in which the metal is laid down precisely and in a predetermined fashion on one or more surfaces of a composite. Deposition provides a high performance electrocatalyst for a number of suitable applications.

Abstract: Carried catalysts for producing alcohols from gaseous mixtures containing hydrogen and carbon monoxide, e.g., syngas, are made from precursors of a particulate inert porous catalyst substrate impregnated with the oxides or salts of molybdenum, cobalt, and a promoter alkali or alkaline earth metal, in a molybdenum to cobalt molar ratio of from about 2:1 to about 1:1, preferably about 1.5:1, and in a cobalt to alkali metal molar ratio of from about 1:0.08 to about 1:0.30, preferably about 1:0.26-0.28. The catalysts are “activated” by reducing the catalyst precursor material in a reducing environment at from about 600° C. to about 900° C., preferably about 800° C. Alcohols are produced by passing gas mixtures containing at least CO and H2 in ratios of from 1:1 to 3:1 through a reactor containing the catalyst, at from about 240° C. to about 270° C., and a pressure of 1000-1200 psi.

Abstract: A catalyst system including at least one metal and an oxide support, said oxide support including at least one of Al2O3, MnxOy, MgO, ZrO2, and La2O3, or any mixtures thereof; said catalyst being suitable for catalyzing at least one reaction under supercritical water conditions is disclosed. Additionally, a system for producing a high-pressure product gas under super-critical water conditions is provided. The system includes a pressure reactor accommodating a feed mixture of water and organic matter; a solar radiation concentrating system heating the pressure reactor and elevating the temperature and the pressure of the mixture to about the water critical temperature point and pressure point or higher. The reactor is configured and operable to enable a supercritical water process of the mixture to occur therein for conversion of the organic matter and producing a high-pressure product fuel gas.

Abstract: A method is disclosed of producing stable nanosized colloidal suspensions of particles with limited crystallinity loss, products thereof, use of the products and an apparatus for the method. In particular the present invention relates to a wet milling method with small beads wherein the size of the final particles in suspension are stabilized in the nanorange (D50<75 nm) and at the same time the particles substantially maintain the crystallinity.

Abstract: Described is a catalyst comprising a substrate and a catalyst coating of two or more layers: (a) a first layer comprising Pt and/or Pd on the substrate; and (b) a second layer comprising Pt on the first layer; these layers each further comprising: one or more particulate support materials; one or more oxygen storage component (OSC) materials; and one or more nitrogen oxide storage materials comprising one or more elements selected from the group of alkali and/or alkaline earth metals, wherein the total amount of alkali and alkaline earth metals ranges from 0.18 to 2.5 g/in3 calculated as the respective alkali metal oxides M2O and alkaline earth metal oxides MO. Also described is a method for the production of a catalyst, as well as a process for the treatment of a gas stream comprising nitrogen oxide, in particular of an exhaust gas stream resulting from an internal combustion engine.

Abstract: Described is a catalyst comprising a substrate and a catalyst coating of two or more layers: (a) a first layer comprising Pd and Rh on the substrate; and (b) a second layer comprising Pt and/or Pd on the first layer; these layers each further comprising: one or more particulate support materials; one or more oxygen storage component (OSC) materials; and one or more nitrogen oxide storage materials comprising one or more elements selected from the group of alkali and/or alkaline earth metals, wherein the total amount of alkali and alkaline earth metals ranges from 0.18 to 2.0 g/in3 calculated as the respective alkali metal oxides M2O and alkaline earth metal oxides MO. Also described is a method for the production of a catalyst, as well as a process for the treatment of a gas stream, in particular of an exhaust gas stream resulting from an internal combustion engine.

Abstract: The invention provides a method of increasing the mesopore volume of a porous activated carbon, comprising coating a porous activated carbon with a metal oxide or metal oxide precursor to form a treated activated carbon; and calcining the treated activated carbon, in a dry atmosphere, for a time and at a temperature sufficient to increase the mesopore volume of the treated activated carbon. The invention also provides an activated carbon having a total mesopore volume of at least about 0.10 cc/g and less than about 0.25 cc/g, and a percentage of mesopore volume per total pore volume of at least about 15% and less than about 35%. Activated carbon modified according to the invention, cigarette filters incorporating such activated carbon, and smoking articles made with such filters are included in the invention.