Abstract:
A three-way catalyst article, and its use in an exhaust system for internal combustion engines, is disclosed. The catalyst article for treating exhaust gas comprising: a substrate; and a single catalyst layer deposited directly on the substrate; wherein the single catalyst layer comprises a first platinum group metal (PGM) component, an oxygen storage component (OSC) material, and an inorganic oxide; and wherein the single catalyst layer has a total washcoat loading of less than 0.15 g/cm 3 (2.4 g/in 3 ).
Abstract:
The present disclosure discloses catalysts for treating exhaust gas, including exhaust gas resulting from the combustion of natural gas, combustible hydrocarbon liquids, oil, kerosene, coal, or wood, and other organic fuels. An exemplary catalyst comprises a substrate, a first washcoat layer comprising porous micron-sized particles comprising palladium on ceria, and alumina derived from boehmite, and a second washcoat layer comprising porous micron-sized particles comprising platinum on alumina, and alumina derived from boehmite. Additional components which can be used in the washcoat layers are also disclosed.
Abstract:
An exhaust system for an internal combustion engine, the exhaust system comprising, a lean NO x trap (LNT), a wall flow monolithic substrate having a NO x storage and reduction zone thereon, the wall flow monolithic substrate having a pre-coated porosity of 40% or greater, the NO x storage and reduction zone comprising a platinum group metal loaded on a first support, the first support comprising one or more alkaline earth metal compounds, a mixed magnesium / aluminium oxide, cerium oxide, and at least one base metal oxide selected the group consisting of copper oxide, manganese oxide, iron oxide and zinc oxide.
Abstract:
Die vorliegende Erfindung betrifft einen Stickoxid-Speicherkatalysator aus mindestens zwei katalytisch aktiven Washcoatschichten auf einem Tragköper, wobei eine untere Washcoatschicht A Ceroxid, eine Erdalkaliverbindung und/oder eine Alkaliverbindung, Platin und Palladium, sowie Manganoxid enthält und eine obere Washcoatschicht B, die über der Washcoatschicht A angeordnet ist, Ceroxid, sowie Platin und Palladium enthält und frei ist von Alkali- und Erdalkaliverbindungen, sowie ein Verfahren zur Konvertierung von NO x in Abgasen von Kraftfahrzeugen, die mit mager betriebenen Motoren betrieben werden.
Abstract translation:
本发明涉及一种氮氧化物存储催化剂包含在一Tragk&OUML至少两个催化活性活化涂层;每,其中一个底活化涂层的铈氧化物,碱土金属化合物和/或碱性化合物,铂和钯,以及氧化锰包含&AUML 以及设置在载体涂层A,氧化铈以及铂和钯之上并且不含碱金属和碱土金属化合物的上洗涂层B以及用于将NO x < >用稀薄燃烧发动机驱动的汽车废气。 p>
Abstract:
This invention relates to stable, as-designed metal oxide nanofibers and flexible and stable nanofibrous fabric made with said nanofibers. The preparation method of the nanofibers involves the formation of nanofibers by electrospinning followed by drying and calcination for forming metal oxides. The nanofibers are composed of tungsten oxide and titanium dioxide in rutile and anatase forms as main compositions, The surface of the nanofibers contains zinc tungsten oxide (sanmatinite) nanorods. In addition, the surface of nanofibers and the zinc tungsten oxide nanorod are decorated by noble metal nanoparticles in a single layer form. The photocatalytic materials are able to work under visible, UV or sunlight. The nanoscale materials have fine porosity and high surface area. This invention can overcome the fragility and instability problems of tungsten oxide (WO 3 ) nanofibers.
Abstract:
The invention relates to polyoxometalates represented by the formula (A n )m+{M' s [M''M 12 X 8 O y R z H q ]} m- or solvates thereof, corresponding supported polyoxometalates, and processes for their preparation, as well as corresponding metal-clusters, optionally in the form of a dispersion in a liquid carrier medium or immobilized on a solid support, and processes for their preparation, as well as their use in reductive conversion of organic substrate.
Abstract:
Catalysts that improve carbon monoxide (CO), hydrocarbon (HC), and nitrogen oxides (NOx) light-off performance are provided. A catalyst composite for combustion engines, as provided herein, comprises a carrier and a first layer comprising a catalytic material on the carrier, the catalytic material comprising a palladium component supported on both a ceria-praseodymia-based oxygen storage component and a ceria-zirconia-based oxygen storage component, wherein the first layer is essentially free of alumina. The catalytic material is effective to substantially simultaneously oxidize carbon monoxide and hydrocarbons and reduce nitrogen oxides.
Abstract:
The present disclosure relates to micron-sized particle used for catalyzing and storing NOx gases, such as those found in vehicle exhaust emissions, washcoats employing micron-sized particle used for catalyzing and storing NOx gases, washcoat coated substrates, lean NOx trap (LNT) systems, and vehicles using such systems. Also provided are methods of preparing micron-sized particle used for catalyzing and storing NOx gases, as well as preparation of washcoats and coated substrates. More specifically, the present disclosure relates to a lean NOx trapping materials, wherein the materials include a NOx catalytic component attached to a micron-sized carrier particle and a NOx storage component, as well as washcoats and coated substrates useful in the treatment of exhaust gases. In some embodiments, a portion of the NOx storage component is attached to the micron-sized carrier particle.
Abstract:
A three-way catalyst composition, and its use in an exhaust system for internal combustion engines, is disclosed. The three-way catalyst composition comprises rhodium, a cerium-containing oxide, and a supported palladium component. The supported palladium component comprises palladium, barium, and cobalt and alumina. The three-way catalyst composition shows improved light-off performance.