Patent application number | Description | Published |
20090169451 | Catalytic reduction of NOx - A system for NO | 07-02-2009 |
20100199646 | Catalytic reduction of NOx - A system for NO | 08-12-2010 |
20110154807 | NOx TRAP - A NOx trap comprises components comprising at least one platinum group metal, at least one NOx storage material and bulk ceria or a bulk cerium-containing mixed oxide deposited uniformly in a first layer on a honeycombed substrate monolith, the components in the first layer having a first, upstream, zone having increased activity relative to a second, downstream zone for oxidising hydrocarbons and carbon monoxide, and a second, downstream, zone having increased activity to generate heat during a desulphation event, relative to the first zone, wherein the second zone comprises a dispersion of rare earth oxide, wherein the rare earth oxide loading in the second zone is greater than the loading in the first zone. An exhaust system for a lean burn internal combustion engine, a vehicle comprising a lean burn internal combustion engine and the exhaust system and methods of making the NOx trap are also disclosed. | 06-30-2011 |
20110179777 | EXHAUST SYSTEM FOR A LEAN BURN IC ENGINE - An exhaust system( | 07-28-2011 |
20110182790 | TRANSITION METAL-CONTAINING ALUMINOSILICATE ZEOLITE - A synthetic alumino silicate zeolite catalyst containing at least one catalytically active transition metal selected from the group consisting of Cu, Fe, Hf, La, Au, In, V, lanthanides and Group VIII transition metals, which alumino silicate zeolite is a small pore aluminosilicate zeolite having a maximum ring size of eight tetrahedral atoms, wherein the mean crystallite size of the aluminosilicate zeolite determined by scanning electron microscope is >0.50 micrometer. | 07-28-2011 |
20110258993 | EXHAUST SYSTEM FOR LEAN BURN IC ENGINE INCLUDING PARTICULATE FILTER AND NOX ABSORBENT - An exhaust system for a lean burn internal combustion engine comprises a particulate filter (CSF), a first NO | 10-27-2011 |
20110268624 | COATING A MONOLITH SUBSTRATE WITH CATALYST COMPONENT - A method of coating a honeycomb monolith substrate comprising a plurality of channels with a liquid comprising a catalyst component comprises the steps of: (i) holding a honeycomb monolith substrate substantially vertically; (ii) introducing a pre-determined volume of the liquid into the substrate via open ends of the channels at a lower end of the substrate; (iii) sealingly retaining the introduced liquid within the substrate; (iv) inverting the substrate containing the retained liquid; and (v) applying a vacuum to open ends of the channels of the substrate at the inverted, lower end of the substrate to draw the liquid along the channels of the substrate. | 11-03-2011 |
20110286903 | CATALYTIC REDUCTION OF NOx - A system for NO | 11-24-2011 |
20120186229 | ZONED CATALYTIC FILTERS FOR TREATMENT OF EXHAUST GAS - Provided is an SCRF article having different SCR catalysts compositions disposed on a wall-flow filter substrate in zones that are arranged in series with respect to the inlet and outlet faces of the substrate. Also provided is method of reducing backpressure and ammonia slip that involves the use of such SCRF articles. | 07-26-2012 |
20120201731 | ZEOLITE CATALYST CONTAINING METAL - Provided is a catalyst comprising (a) a zeolite material having a mean crystal size of at least about 0.5 μm, having a CHA framework that contains silicon and aluminum, and having a silica-to-alumina mole ratio (SAR) of about 10 to about 25; and (b) an extra-framework promoter metal (M) disposed in said zeolite material as free and/or exchanged metal, wherein the extra-framework promoter metal is copper, iron, and mixtures thereof, and is present in a promoter metal-to-aluminum atomic ratio (M:Al) of about 0.10 to about 0.24 based on the framework aluminum; and optionally comprising (c) at least about 1 weight percent of cerium in said zeolite material, based on the total weight of the zeolite, wherein said cerium is present in a form selected from exchanged cerium ions, monomeric ceria, oligomeric ceria, and combinations thereof, provided that said oligomeric ceria has a particle size of less than 5 μm. | 08-09-2012 |
20120258032 | CATALYZED FILTER FOR TREATING EXHAUST GAS - Provided is a wall-flow filter coated with an SCR catalyst composition, wherein the catalyst composition contains transition metal promoted molecular sieve crystals, and wherein (i) the crystals have a mean crystalline size of about 0.5 μm to about 15 μm, (ii) the crystals are present in said composition as individual crystals, agglomerations having a mean particle size of less than about 15 μm, or a combination of said individual crystals and said agglomerations; and (iii) said molecular sieve is an aluminosilicate or a silico-aluminophosphate of a Framework Type having a maximum ring size of eight tetrahedral atoms. | 10-11-2012 |
20120275977 | CATALYSTS FOR TREATING TRANSIENT NOx EMISSIONS - A heterogeneous catalyst article having at least one combination of a first molecular sieve having a medium pore, large pore, or meso-pore crystal structure and optionally containing a first metal, and a second molecular sieve having a small pore crystal structure and optionally containing a second metal, and a monolith substrate onto or within which said catalytic component is incorporated, wherein the combination of the first and second molecular sieves is a blend, a plurality of layers, and/or a plurality of zones. | 11-01-2012 |
20130136677 | CATALYSTS FOR TREATING TRANSIENT NOx EMISSIONS - A heterogeneous catalyst article having at least one combination of a first molecular sieve having a medium pore, large pore, or meso-pore crystal structure and optionally containing a first metal, and a second molecular sieve having a small pore crystal structure and optionally containing a second metal, and a monolith substrate onto or within which said catalytic component is incorporated, wherein the combination of the first and second molecular sieves is a blend, a plurality of layers, and/or a plurality of zones. | 05-30-2013 |
20130340413 | EXHAUST SYSTEM INCLUDING NOx REDUCTION CATALYST AND EGR CIRCUIT - An exhaust system for a vehicular lean burn internal combustion engine that emits oxides of nitrogen (NOx) and particulate matter (PM) is disclosed. The system comprises a NOx reduction catalyst for reducing NOx in the presence of a reductant, means for introducing reductant into a flowing exhaust gas and a source of hydrocarbon reductant, a nitrogenous reductant, and/or hydrogen, a filter for removing PM from exhaust gas flowing in the exhaust system and a low pressure exhaust gas recirculation (EGR) circuit for connecting the exhaust system downstream of the filter to an air intake of the engine. The EGR circuit comprises a IMOx adsorber catalyst (NAC) comprising a NO adsorbent. | 12-26-2013 |
20140033685 | EXHAUST SYSTEM HAVING AMMONIA SLIP CATALYST AND EGR CIRCUIT - An exhaust system for a vehicular lean burn internal combustion engine that emits oxides of nitrogen (NOx) and particulate matter (PM) is disclosed. The system comprises a NOx reduction catalyst for reducing NOx in the presence of a nitrogenous reductant, means for introducing the nitrogenous reductant into a flowing exhaust gas, a filter for removing PM from exhaust gas flowing in the exhaust system and a low pressure exhaust gas recirculation (EGR) circuit for connecting the exhaust system downstream of the filter to an air intake of the engine. The EGR circuit comprises an ammonia oxidation catalyst. | 02-06-2014 |
20140037523 | ZEOLITE CATALYST CONTAINING METAL - A catalyst composition is provided having a zeolite material of a CHA crystal structure and a silica to alumina mole ratio (SAR) of about 10 to about 25 and preferably having a mean crystal size of at least 1.0 microns; and a non-aluminum base metal (M), wherein said zeolite material contains said base metal in a base metal to aluminum ratio (M:Al) of about 0.10 to about 0.24. | 02-06-2014 |
20140157763 | EXTRUDED HONEYCOMB CATALYST - An extruded honeycomb catalyst for nitrogen oxide reduction according to the selective catalytic reduction (SCR) method in exhaust gases from motor vehicles includes an extruded active carrier in honeycomb form having a first SCR catalytically active component and with a plurality of channels through which the exhaust gas flows during operation, and a washcoat coating having a second SCR catalytically active component being applied to the extruded body, wherein the first SCR catalytically active component and the second SCR catalytically active component are each independently one of:
| 06-12-2014 |
20140186232 | COATING A MONOLITH SUBSTRATE WITH CATALYST COMPONENT - A method of coating a honeycomb monolith substrate comprising a plurality of channels with a liquid comprising a catalyst component comprises the steps of: (i) holding a honeycomb monolith substrate substantially vertically; (ii) introducing a pre-determined volume of the liquid into the substrate via open ends of the channels at a lower end of the substrate; (iii) sealingly retaining the introduced liquid within the substrate; (iv) inverting the substrate containing the retained liquid; and (v) applying a vacuum to open ends of the channels of the substrate at the inverted, lower end of the substrate to draw the liquid along the channels of the substrate. | 07-03-2014 |
20140241950 | Exhaust System for a Lean Burn IC Engine - An exhaust system ( | 08-28-2014 |
20140260200 | Catalytic Reduction of NOx - A system for NO | 09-18-2014 |
20140271385 | Catalytic Reduction of NOx - A system for NO | 09-18-2014 |
20140271423 | CATALYTIC REDUCTION OF NOX - A system for NO | 09-18-2014 |
20140328738 | Catalyst for Treating Exhaust Gas - Provided is a metal promoted, low SAR zeolite-based SCR catalyst having at least about 1.35 weight percent of cerium, based on the total weight of the zeolite, wherein said cerium is present in a form selected from exchanged cerium ions, monomeric ceria, oligomeric ceria, and combinations thereof, provided that said oligomeric ceria has a particle size of less than 5 μm, the catalyst having superior durability after hydrothermal aging. | 11-06-2014 |
20150010451 | CATALYTIC REDUCTION OF NOx - A system for NO | 01-08-2015 |
20150064074 | ZEIOLITE CATALYST CONTAINING METAL - A catalyst composition is provided wherein the composition includes a zeolite having a non-phosphorous CHA crystal structure and having a mean crystalline size of about 1 to about 5 microns; and at least one non-aluminum base metal present in an amount sufficient to achieve a NOx conversion of at least about 65% at a temperature of at least 450° C. | 03-05-2015 |
20150064088 | ZEOLITE BLEND CATALYSTS FOR TREATING EXHAUST GAS - Provided is an improved catalyst for treating exhaust gas, particularly for selectively reducing NO | 03-05-2015 |