Abstract:
An oxidation catalyst is described for treating hydrocarbons in an exhaust gas produced by an internal combustion engine, wherein the oxidation catalyst comprises a region disposed on a substrate, wherein the region comprises ruthenium (Ru) supported on a support material comprising a refractory oxide.
Abstract:
Ein Neutralisations-Additiv wird als geruchshemmendes Material eingesetzt. Das Neutralisations-Additiv dient zur Zugabe zu einem polymeren Grundmaterial, bei welchem es sich um Silikon handelt. Das Additiv umfasst ein Adsorbens zur Neutralisierung geruchsbildender Moleküle und ein katalytisches Material zur Aufspaltung geruchsbildender Moleküle. Es resultiert ein Neutralisations-Additiv, bei dem eine Freisetzung von geruchsbildenden Verbindungen in eine äußere Umgebung zumindest weitgehend verhindert ist, und welches sich mit einem polymeren Grundmaterial zu einem Produkt formen lässt.
Abstract:
A passive NOx adsorber is disclosed. The passive NO x adsorber is effective to adsorb NO x at or below a low temperature and release the adsorbed ΝΟ x at temperatures above the low temperature. The passive NO x adsorber comprises a noble metal and a molecular sieve having an LTL Framework Type. The invention also includes an exhaust system comprising the passive NO x adsorber, and a method for treating exhaust gas from an internal combustion engine utilizing the passive NO x adsorber.
Abstract:
Catalysts having a blend of platinum on a support with low ammonia storage with an SCR catalyst are disclosed. The catalysts can also contain one or two additional SCR catalysts. The catalysts can be present in one of various configurations. Catalytic articles containing these catalysts are disclosed. The catalytic articles are useful for selective catalytic reduction (SCR) of NOx in exhaust gases and in reducing the amount of ammonia slip. Methods for producing such articles are described. Methods of using the catalytic articles in an SCR process, where the amount of ammonia slip is reduced, are also described.
Abstract:
An oxidation catalyst for treating an exhaust gas produced by a compression ignition engine comprising: a substrate having an inlet end surface and an outlet end surface; a catalytic material disposed on the substrate, wherein the catalytic material comprises platinum (Pt); and a capture material, wherein the capture material is disposed on the outlet end surface.
Abstract:
Gegenstand der vorliegenden Erfindung ist die Verwendung von Katalysatoren zur Entfernung von Sauerstoff aus Gasen enthaltend ein oder mehrere ethylenisch ungesättigte Kohlenwasserstoffe, dadurch gekennzeichnet, dass ein oder mehrere Katalysatoren als Aktivkomponenten a) ein oder mehrere Alkalimetalle, b) ein oder mehrere Metalle ausgewählt aus der Gruppe umfassend Gold und Cadmium, und c) ein oder mehrere Metalle ausgewählt aus der Gruppe umfassend Palladium, Platin, Rhodium, Iridium und Ruthenium enthalten, wobei die Aktivkomponenten a), b) und c) unabhängig voneinander in metallischer Form, als Legierung oder in Form von Salzen vorliegen.
Abstract:
An emission control catalyst composition comprising a supported bimetallic catalyst consisting of gold and a metal selected from the group consisting of platinum, rhodium, ruthenium, copper and nickel is disclosed. Also disclosed is a catalytic convertor comprising a substrate monolith coated with the emission control catalyst composition and a lean burn internal combustion engine exhaust gas emission treatment system comprising the catalytic convertor. A variety of processes for preparing the catalyst composition are claimed.
Abstract:
The present invention relates to a diesel oxidation catalyst comprising a carrier substrate, and a first washcoat layer disposed on the substrate, the first washcoat layer comprising palladium supported on a support material comprising a metal oxide, gold supported on a support material comprising a metal oxide, and a ceria comprising compound, as well as a process for the preparation of such catalyst.
Abstract:
A substrate monolith (6) having a length L and comprising a first zone (11) of substantially uniform length defined at one end by a first end of the substrate monolith, which first zone comprising a selective catalytic reduction (SCR) catalyst for reducing oxides of nitrogen with a nitrogenous reductant in exhaust gas emitted from an internal combustion engine and a second zone (8) of substantially uniform length less than L defined at one end by a second end of the substrate monolith, which second zone comprising (a) at least one particulate metal oxide or a mixture of any two or more thereof for trapping gas phase platinum group metal (PGM), which at least one particulate metal oxide does not act as a support for any other catalytic component; or (b) a component capable of trapping and/or alloying with gas phase PGM.