Abstract:
A method of producing a catalyst comprises generating an aerosolized flow of catalyst support particles, heating a catalytically active compound precursor to produce a catalytically active compound precursor vapor, contacting the aerosolized flow of catalyst support particles with the catalytically active compound precursor vapor, and condensing the catalytically active compound precursor onto the catalyst support particles to produce the catalyst comprising catalytically active compound deposited on surfaces of the catalyst support particles. The method may further comprise aerosolizing a catalyst support precursor mixture, drying the aerosolized catalyst support precursor mixture in a first heating zone to form an aerosolized flow of catalyst support particles, and contacting the catalyst support particles with a catalytically active compound precursor vapor in a second heating zone to form the catalyst comprising the layer of the catalytically active compound deposited on surfaces of the catalyst of catalyst support particles.
Abstract:
Synergies resulting from combinations of catalyst systems including Copper-Manganese material compositions and PGM catalysts are disclosed. Variations of catalyst system configurations are tested to determine most effective material composition, formulation, and configuration for an optimal synergized PGM (SPGM) catalyst system. The synergistic effect of the selected SPGM catalyst system is determined under steady state and oscillating test conditions, from which the optimal NO/CO cross over R-value indicates enhanced catalytic behavior of the selected SPGM catalyst system as compared with current PGM catalysts for TWC applications. According to principles in the present disclosure, application of Pd on alumina-based support as overcoat and Cu-Mn spinel structure supported on Nb2O5-ZrO2 as washcoat on suitable ceramic substrate, produce higher catalytic activity, efficiency, and better performance in TWC condition, especially under lean condition, than commercial PGM catalysts.
Abstract:
Die vorliegende Erfindung betrifft ein Verfahren zur Herstellung von Polyolen, umfassend den Schritt der Hydrierung von CO/Olefin-Copolymeren in der Gegenwart von heterogenen Hydrierkatalysatoren. Das CO/Olefin-Copolymer ist ein nicht-alternierendes Copolymer mit einem CO-Gehalt von ≤ 33% mol-% und der heterogene Hydrierkatalysator umfasst ein Metall ausgewählt aus der Gruppe Mangan, Technetium, Rhenium, Eisen, Ruthenium, Osmium, Cobalt, Rhodium, Iridium, Nickel und/oder Kupfer. Sie betrifft weiterhin Polyole, welche durch das erfindungsgemäße Verfahren erhältlich sind sowie deren Verwendung zur Herstellung von Polyurethanpolymeren oder Formaldehydharzen oder die Verwendung als Weichmacher.
Abstract:
A method of preparing a steam reforming catalyst characterized by improved resistance to attrition loss when used for cracking, reforming, water gas shift and gasification reactions on feedstock in a fluidized bed reactor, comprising: fabricating the ceramic support particle, coating a ceramic support by adding an aqueous solution of a presursor salt of a metal selected from the group consisting of Ni, Pt, Pd, Ru, Rh, Cr, Co, Mn, Mg, K, La and Fe and mixtures thereof to the ceramic support and calcining the coated ceramic in air to convert the metal salts to metal oxides.
Abstract:
The present invention provides a catalyst comprising a transition metal, an inorganic support, a zeolite, and a layered double hydroxide. Using of the catalyst according to the present invention in an olefin production process exhibits high activity and high selectivity with decreased deactivation rate, therefore longer reaction cycle can be performed and catalyst life is prolonged.
Abstract:
An improved dehydrogenation catalyst bed system for olein production utilizing classical processing techniques is disclosed. The catalyst bed system comprises a dehydrogenation catalyst comprising an active component selected from an oxide of a metal of Group 4 or Group 5 or Group 6 and combinations thereof and a support selected from aluminum oxide, aluminas, alumina monohydrate, alumina trihydrate, alumina-silica, transition aluminas, alpha- alumina, silica, silicate, aluminates, calcined hydrotalcites, zeolites and combinations thereof mixed with a first inert material selected from any material that is catalytically inactive when subjected to reaction conditions that can effect dehydrogenation of olefins and that has a high density and high heat capacity and that is not capable of producing heat during any stage of the dehydrogenation process, and the dehydrogenation catalyst plus the first inert material then being physically mixed with a secondary component comprising a heat-generating inert material and a carrier capable of supporting the heat-generating inert material, wherein the secondary component is catalytically inert with respect to dehydrogenation reactions or to cracking or to coking and generates heat after being exposed to reducing and/or to oxidizing reaction conditions.
Abstract:
Nitrogen oxides contained in exhaust gas from lean-burn engines-mounted internal combustion engines are effectively controlled. An exhaust emission control system and method therefor for controlling nitrogen oxides contained in combustion exhaust gas from internal combustion engines in the presence of a catalyst using reducing gases such as carbon monoxide and hydrogen carbide contained in the exhaust gas, wherein the catalyst used consists of a porous carrier, all of Rh, Pt and Pd, at least selected one of alkali metal and alkali earth metal and Mn or its compound, all formed on the porous carrier.