Provided are catalysts for reduction of nitrogen oxides including an active site including lanthanum vanadate represented by at least one of Formula 1 and Formula 2 and a support carrying the active site.
LaVO.sub.4 (wherein LaVO.sub.4 is polymorphous and has a tetragonal or monoclinic crystal structure)  Formula 1
LaV.sub.3O.sub.9 (wherein LaV.sub.3O.sub.9 has a monoclinic crystal structure)  Formula 2.

Some embodiments include a copper (Cu)-doped titania coating layer, including a titania matrix and Cu element doped therein, characterized in that a doping amount of the Cu element is 4-25 mol % of the entire cured coating layer. Some embodiments include a coating composition of the coating layer, and a process for preparing the coating composition, including: (1) preparing a solution comprising a titanium alkoxide and a diluent; (2) preparing a solution comprising a copper precursor compound and a diluent, (3) mixing the above two solutions to obtain a precursor mixture of the composition, wherein in the above steps (1) and (2), the pH value of the solutions is controlled to in the range of 0.1 to 6, and the solutions of steps (1) and (2) are substantially free of water.

Provided are catalyst particles for treating vehicle exhaust gas, containing semiconductor nanoparticles supported by noble metals.

Present invention relates to a process for production of isomerization catalyst, containing a base of zirconia, a binder based on alumina and/or silica at-least one component of Group VI of the periodic table in the form of their oxyanions, a hydrogenation/dehydrogenation component loaded on the base, at least one metal selected from the group consisting of Pt, Pd, Sn, Re or mixtures thereof, and an peptization agent, wherein the peptizing agent is an organic acid and polymers, which improve the physicochemical properties of the isomerization catalyst for the production of C4-C12 paraffin's.

The present invention features a direct synthesis of light olefins through the hydrogenation of carbon dioxide. In.sub.2O.sub.3 supported on cubic phase yttria-stabilized zirconia is used as a catalyst and is mixed with a molecular sieve to perform the hydrogenation. The cubic crystal structure of the yttria-stabilized zirconium dioxide is an excellent support for indium oxide particles and prevents their deactivation during CO.sub.2 hydrogenation. This direct synthesis route promotes a stable and efficient method for producing light olefins.

The invention relates to a method of regenerating the catalytic activity of a spent catalyst comprising nickel on a refractory oxide support, said method comprising the steps of contacting the spent catalyst with a nitric acid solution, heat-treating the spent catalyst, calcining and reducing the catalyst.

The invention relates to a mixed oxide composed of zirconium, cerium, lanthanum and at least one rare earth oxide other than cerium and lanthanum, having a specific porosity and a high specific surface area; to the method for preparing same and to the use thereof in catalysis.

The present invention relates to a process for starting up a reactor for preparation of phthalic anhydride by the catalytic oxidation of ortho-xylene and/or naphthalene, containing a bed of shaped catalyst bodies and within a temperature-controlled salt bath. The industrial production of phthalic anhydride from ortho-xylene and/or naphthalene is affected by selective gas phase oxidation in a shell and tube reactor cooled with a salt bath, which may contain several thousand reactor tubes. There are 4 to 5 different catalyst layers in each reactor, which are introduced into each reactor successively in axial direction.

Provided is a catalyst that is free from catalyst deactivation caused by reaction of the support and exhibits good catalytic activity in an ammonia synthesis reaction in a low-temperature, low-pressure process. The present invention relates to an ammonia synthesis catalyst having a structure in which at least one of ruthenium or an oxide of ruthenium is loaded on a titanium suboxide support represented by the composition formula TiOx where x represents a number satisfying 1.5<x<2.0.

Provided is a catalyst that is free from catalyst deactivation caused by reaction of the support and exhibits good catalytic activity in an ammonia synthesis reaction in a low-temperature, low-pressure process. The present invention relates to an ammonia synthesis catalyst having a structure in which at least one of ruthenium or an oxide of ruthenium is loaded on a titanium suboxide support represented by the composition formula TiOx where x represents a number satisfying 1.5<x<2.0.