A method for selective hydrogenation of gasoline including polyunsaturated compounds and light sulfur compounds wherein the gasoline and hydrogen is brought into contact with a catalyst containing a group VIB metal, a group VIII metal and a mesoporous and macroporous alumina substrate having a bimodal mesopore distribution and wherein the volume of mesopores having a diameter greater than or equal to 2 nm and less than 18 nm is 10 to 30% by volume of the total pore volume of the substrate, the volume of mesopores having a diameter greater than or equal to 18 nm and less than 50 nm is 30 to 50% by volume of the total pore volume of the substrate; the volume of macropores having a diameter greater than or equal to 50 nm and less than 8000 nm is 30 to 50% by volume of the total pore volume of the substrate.

A ceria-zirconia-based composite oxide containing a composite oxide of ceria and zirconia is provided, in which primary particles having a particle diameter of 1.5 to 4.5 m account for, on a particle number basis, at least 50% of all primary particles in the ceria-zirconia-based composite oxide, and the molar ratio of cerium to zirconium in the ceria-zirconia-based composite oxide is between 43:57 and 55:45.

The present invention relates to granulated particles with improved attrition and a method for producing granulated particles by fluidized bed granulation of inorganic particles wherein particles of reduced particle size are fed into a fluldized-bed granulation reactor thereby producing granulated particles with improved attrition.

The present invention relates to a method for producing automobile exhaust gas catalytic converters, to the catalytic converters as such and to the use thereof. In particular, the method comprises a step which results, independently of the actual drying process, in the catalytically active material used being dried. The invention is especially used in the coating of wall-flow filters.

The present invention relates to a method for producing automobile exhaust gas catalytic converters, to the catalytic converters as such and to the use thereof. In particular, the method comprises a step which results in a smaller particle size of the catalytically active material used.

An oxidation catalyst includes cerium dioxide particles and a metal oxide. The cerium dioxide particles contain an ancillary component that is at least one of lanthanum, aluminum, and iron. The metal oxide contains iron and manganese and is held by the cerium dioxide particles.

The invention discloses a novel method for preparation of highly active and selective dehydrogenation catalyst, comprising of metal oxide of group VIB elements of periodic table, and at least one metal oxide from group IA and/or group VIII, supported on alumina or silica or mixture thereof, wherein the accessibility to active sites and dispersion of metal oxides is enhanced by the addition of carbonaceous material such as coke derived from coal or petroleum coke or any other form of carbon, during catalyst preparation and its combustion thereof during calcination.

A perovskite-type oxide catalyst for water-splitting reactions is provided. The catalyst, Ca.sub.2-ySr.sub.yFe.sub.1-xCo.sub.1-xMn.sub.2xO.sub.6- where y=0.10-1.90 and x=0.05-0.95, has catalytic activity for both hydrogen- and oxygen-evolution reactions. An exemplary catalyst is CaSrFe.sub.0.75Co.sub.0.75Mn.sub.0.5O.sub.6-.

A method for making a catalyst includes a step of forming a first reaction mixture that includes a metal source, a nitrogen source, and at least one silica template. Characteristically, the at least one silica template including silica particles. A combination of the first reaction mixture and a fluorinated polymer is mechanochemically mixed to form a first pre-pyrolysis powder. A first pyrolysis of the first pre-pyrolysis powder is performed at a first temperature greater than about 800 C. under an inert atmosphere to form a first pyrolyzed composition. Advantageously, at least a portion of silica particles is removed and mesostructured carbon is formed. The first pyrolyzed composition is optionally mechanochemically mixing to form a second pre-pyrolysis powder. A second pyrolysis of the first first pyrolyzed composition or the second pre-pyrolysis powder is performed under a reductive atmosphere at a second temperature that is greater than about 800 C. to form a final catalyst powder.

A catalytic bed for the partial oxidation of n-butane to maleic anhydride which comprises at least one first catalytic layer and at least one second catalytic layer, wherein each catalytic layer consists of a vanadium and phosphorus mixed oxide (VPO) catalyst and only the catalyst of the second catalytic layer further comprises tungsten, and wherein the second catalytic layer constitutes 25% to 45% of the total length of the catalytic bed and is arranged consecutively after the first catalytic layer along the direction in which the mixture of gases comprising the oxidation reagents flows. The present invention also relates to a process for producing maleic anhydride by partial oxidation of n-butane which uses the catalytic bed.