Abstract:
An oxidation catalyst for treating an exhaust gas produced by a diesel engine comprises a catalytic region and a substrate, wherein the catalytic region comprises a catalytic material comprising: bismuth (Bi) or an oxide thereof; a Group 8 metal or an oxide thereof; a platinum group metal (PGM) selected from the group consisting of (i) platinum (Pt), (ii) palladium (Pd) and (iii) platinum (Pt) and palladium (Pd); and a support material, which comprises alumina, silica, a mixed oxide of alumina and a refractory oxide, a mixed oxide of silica and a refractory oxide, a composite oxide of alumina and a refractory oxide, a composite oxide of silica and a refractory oxide, alumina doped with a refractory oxide or silica doped with a refractory oxide.
Abstract:
An oxidation catalyst for treating an exhaust gas from a diesel engine and an exhaust system comprising the oxidation catalyst are described. The oxidation catalyst comprises a washcoat region disposed on a substrate, wherein the washcoat region comprises: palladium (Pd), gold (Au) and a support material, wherein the palladium (Pd) and gold (Au) are supported on the support material; and a molecular sieve catalyst, wherein the molecular sieve catalyst comprises a noble metal and a molecular sieve.
Abstract:
Die vorliegende Erfindung betrifft ein SCR-aktives Material, das einen kleinporigen Zeolithen vom Strukturtyp Levyne (LEV), Aluminiumoxid und Kupfer umfasst, dadurch gekennzeichnet, dass es bezogen auf das gesamte Material 4 bis 25 Gew.-% Aluminiumoxid enthält.
Abstract:
Die vorliegende Erfindung betrifft einen Katalysator, der ein Wandflussfilter der Länge L und Materialzonen A und B umfasst, wobei Materialzone A Ceroxid, eine Erdalkaliverbindung und/oder eine Alkaliverbindung, sowie Platin und/oder Palladium und Materialzone B eine Manganverbindung, sowie Platin und/oder Palladium enthalten.
Abstract:
Method for the preparation of a catalysed monolithic body or a catalysed particulate filter by capillary suction of sol-solution containing catalytically active material and metal oxide catalyst carriers or precursors thereof into pores of monolithic substrate.
Abstract translation:通过将含有催化活性材料和金属氧化物催化剂载体或其前体的溶胶 - 溶液毛细管抽吸到单片基材的孔中来制备催化的整体或催化颗粒过滤器的方法。 p >
Abstract:
A catalyst (2) with a porous, ceramic support body (4) having a porosity which is formed by pores in at least a part of the ceramic support body (4), and which furthermore has a catalytically active washcoat coating (10) applied to the ceramic support body (4), which catalytically active washcoat coating having a layer thickness (d1),comprises a permanent catalytically inactive impregnation (12) comprising at least one catalytically inactive inorganic component, and wherein the permanent inactive impregnation (12):a) has a layer thickness (d2) and is present at least partially between a surface of the porous ceramic support body (4) and the catalytically active washcoat coating (10);and/or b) is present in the pores of the ceramic support body (10) in a region with reduced porosity underneath the surface of the ceramic support body (10).
Abstract:
A combustible gas from carbon black production is utilized in a gas engine by adding an oxygen-containing gas to the combustible gas, passing said mixed gas over a selective catalyst, which is active for oxidizing H 2 S to SO 2 but substantially inactive for oxidation of CO, H 2 and other hydrocarbons with less than 4 C-atoms, passing the converted gas through an SO 2 removal step, and passing the cleaned gas to a gas engine or to an energy recovery boiler.This way, the tail gas from carbon black production, which is normally combusted in a CO boiler or incinerated, can be utilized to good effect.
Abstract:
Described is a catalyst comprising a washcoat including copper or iron on a small pore molecular sieve material having a maximum ring size of eight tetrahedral atoms physically mixed with platinum and rhodium on a refractory metal oxide support including alumina, silica, zirconia, titania, and physical mixtures or chemical combinations thereof, including atomically doped combinations. Also described is a catalyst comprising a first washcoat zone including copper or iron on a small pore molecular sieve material having a maximum ring size of eight tetrahedral atoms, the first washcoat zone being substantially free of platinum group metal; and a second washcoat zone including copper or iron on a small pore molecular sieve material having a maximum ring size of eight tetrahedral atoms physically mixed with platinum or platinum and rhodium on a refractory metal oxide support including alumina, silica, zirconia, titania, and physical mixtures or chemical combinations thereof, including atomically doped combinations. Methods and systems for treating emissions are also described.
Abstract:
A porous ceramic honeycomb body including a substrate of intersecting porous walls forming axial channels extending from a first end face to a second end face. An active portion of the walls include a zeolite catalyst disposed inside pores thereof and/or is comprised of an extruded zeolite and a three way catalyst (TWC) is disposed on wall surfaces of at least a portion of the active portion.