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| Number | Title | Issue Date |
| 8178064 | Treatment of power utilities exhaust Provided is a process for treating nitrogen oxide-containing exhaust produced by a stationary combustion source by the catalytic reduction of nitrogen oxide in the presence of a reductant comprising hydrogen, followed by ammonia selective catalytic reduction to furt... | 05/15/2012 |
| 8173574 | Catalysts to reduce NOin an exhaust gas stream and methods of preparation Catalysts, systems and methods are described to reduce NOx emissions of an internal combustion engine. In one embodiment, an emissions treatment system for an exhaust stream is provided having a catalyst comprising silver on a particulate alumina support,... | 05/08/2012 |
| 8173087 | Gasoline engine emissions treatment systems having particulate traps Provided are exhaust systems and components suitable for use in conjunction with gasoline direct injection (GDI) engines to capture particulates in addition to reducing gaseous emission such as hydrocarbons, nitrogen oxides, and carbon monoxides. Exhaust treatment s... | 05/08/2012 |
| 8148290 | Diesel exhaust treatment system catalyst monitoring Diesel exhaust treatment articles, systems and methods are disclosed. According to one or more embodiments, an oxygen storage component is utilized and degradation of the oxygen storage component is correlated with degradation of the hydrocarbon conversion efficienc... | 04/03/2012 |
| 8122603 | Method of forming a catalyzed selective catalytic reduction (SCR) filter Provided is an emission treatment system and method for simultaneously remediating the nitrogen oxides (NOx), particulate matter, and gaseous hydrocarbons present in diesel engine exhaust streams. The emission treatment system has an oxidation catalyst upstream of a... | 02/28/2012 |
| 8119088 | SCR on low thermal mass filter substrates Provided are selective catalytic reduction (SCR) filters that effectively provide simultaneous treatment of particulate matter and NOx. Provided also are methods for reducing NOx concentration and particulate matter in a diesel engine exhaust b... | 02/21/2012 |
| 8119075 | Diesel particulate filters having ultra-thin catalyzed oxidation coatings The present invention is directed to an exhaust gas treatment system and method for removing particulate matter and nitrogen oxides from diesel engine exhaust streams. More specifically, the present invention relates to an emission treatment system that effectively ... | 02/21/2012 |
| 8114354 | Catalyzed soot filter manufacture and systems Catalyzed soot filters comprising a wall flow monolith having microcracks and pores and a catalyst comprising support particles with particle sizes greater than about the size of the microcracks and less than about the size of the pores are disclosed. Methods of man... | 02/14/2012 |
| 8062990 | Metal catalyst carriers and catalyst members made therefrom A pliable refractory metal carrier (46) may have coated thereon an anchor layer (47) to improve adherence to the carrier (46) of a catalytic coating (48). The conformable catalyst member (26, 82, 82′, 126, 226, 326) may be bent t... | 11/22/2011 |
| 8038956 | Catalyzed soot filter manufacture and systems Catalyzed soot filters comprising a wall flow monolith having microcracks and pores and a catalyst comprising support particles with particle sizes greater than about the size of the microcracks and less than about the size of the pores are disclosed. Methods of man... | 10/18/2011 |
| 8038954 | CSF with low platinum/palladium ratios An emission treatment system including a catalyzed soot filter comprising a wall flow monolith and a catalyst comprising at least two types of support particles is described. The first support particle contains at least a platinum component, the second support parti... | 10/18/2011 |
| 8038951 | Catalyst compositions Provided are catalyst composites comprising: a catalytic material on a carrier, the catalytic material comprising a precious metal selected from a palladium component and an oxygen storage component, the oxygen storage component being present in an amount of at leas... | 10/18/2011 |
| 8022010 | NOx storage materials and traps resistant to thermal aging Nitrogen oxide storage materials and methods of manufacturing nitrogen oxide storage materials are disclosed. The nitrogen oxide storage materials can be used to manufacture catalytic trap disposed in an exhaust passage of an internal combustion engine which is oper... | 09/20/2011 |
| 8007750 | Multilayered catalyst compositions A layered, three-way conversion catalyst having the capability of simultaneously catalyzing the oxidation of hydrocarbons and carbon monoxide and the reduction of nitrogen oxides is disclosed. Methods of making and using the same are also provided. In one or more em... | 08/30/2011 |
| 7998423 | SCR on low thermal mass filter substrates Provided are selective catalytic reduction (SCR) filters that effectively provide simultaneous treatment of particulate matter and NOx. Provided also are methods for reducing NOx concentration and particulate matter in a diesel engine exhaust b... | 08/16/2011 |
| 7981390 | Small engine palladium catalyst article and method of making Catalyst articles comprising substantially only a palladium precious metal component and related methods of preparation and use are disclosed. Disclosed is a catalyst article comprising a first layer formed on a carrier substrate, wherein the first layer comprises a... | 07/19/2011 |
| 7976784 | Methods and systems including CO oxidation catalyst with low NO to NOconversion Catalysts, catalyst systems, and methods for removing ammonia and/or carbon monoxide in flue gases are provided where ammonia is used with a selective catalytic reduction catalyst for reducing oxides of nitrogen. An oxidation catalyst is utilized, which comprises pa... | 07/12/2011 |
| 7951742 | Selective catalytic reduction of NO A gas stream containing nitrous oxide and ammonia is contacted with a catalyst composition containing a zeolite. N2O is reduced to N2 and H2O at low temperatures in a highly efficient manner. Ammonia-mediated reduction of nitrous oxi... | 05/31/2011 |
| 7943548 | Catalysts to reduce NOin an exhaust gas stream and methods of preparation Catalysts, systems and methods are described to reduce NOx emissions of an internal combustion engine. In one embodiment, an emissions treatment system for an exhaust stream is provided having a catalyst comprising silver and a platinum group metal on a p... | 05/17/2011 |
| 7922988 | Multilayered catalyst compositions A layered three-way conversion catalyst having the capability of simultaneously catalyzing the oxidation of hydrocarbons and carbon monoxide and the reduction of nitrogen oxides is disclosed. Engine exhaust treatment system and methods of using the same are also pro... | 04/12/2011 |
| 7919051 | Emission treatment system with NSR and SCR catalysts Provided is an emissions treatment system for an exhaust stream, having a NOx storage reduction (NSR) catalyst with a NOx sorbent at a concentration of at least 0.1 g/in3 and a platinum group metal component dispersed on a refractory metal oxide support; ... | 04/05/2011 |
| 7902107 | Catalyzed SCR filter and emission treatment system Provided is an emission treatment system and method for simultaneously remediating the nitrogen oxides (NOx), particulate matter, and gaseous hydrocarbons present in diesel engine exhaust streams. The emission treatment system has an oxidation catalyst upstream of a... | 03/08/2011 |
| 7879755 | Catalyst compositions Provided are catalyst composites comprising: a catalytic material on a carrier, the catalytic material comprising a precious metal selected from a palladium component and an oxygen storage component, the oxygen storage component being present in an amount of at leas... | 02/01/2011 |
| 7875573 | Pt-Pd diesel oxidation catalyst with CO/HC light-off and HC storage function The present invention is directed to a diesel oxidation catalyst for the treatment of exhaust gas emissions, such as the oxidation of unburned hydrocarbons (HC), and carbon monoxide (CO) and the reduction of nitrogen oxides (NOx). More particularly, the present inve... | 01/25/2011 |
| 7811962 | Manufacture of exhaust articles for internal combustion engines Provided are methods for manufacturing a base metal undercoat containing catalyst and an exhaust article containing the catalyst. The catalyst contains a base metal undercoat with an oxygen storage component, substantially free of platinum group metal components, an... | 10/12/2010 |
| 7759280 | Catalysts, systems and methods to reduce NOX in an exhaust gas stream Catalysts, systems and methods are described to reduce NOx emissions of an internal combustion engine. In one embodiment, an emissions treatment system for an exhaust stream is provided having an SCR catalyst comprising silver tungstate on an alumina supp... | 07/20/2010 |
| 7758834 | Layered catalyst composite A layered, three-way conversion catalyst having the capability of simultaneously catalyzing the oxidation of hydrocarbons and carbon monoxide and the reduction of nitrogen oxides is disclosed. In one or more embodiments, the catalyst comprises three layers in conjun... | 07/20/2010 |
| 7754171 | Multilayered catalyst compositions A multilayered, three-way conversion catalyst having the capability of simultaneously catalyzing the oxidation of hydrocarbons and carbon monoxide and the reduction of nitrogen oxides is disclosed. Provided is a catalytic material of at least four layers in conjunct... | 07/13/2010 |
| 7753992 | Methods of manufacturing mercury sorbents and removing mercury from a gas stream Sorbents for removal of mercury and other pollutants from gas streams, such as a flue gas stream from coal-fired utility plants, and methods for their manufacture and use are disclosed. The methods include injecting fluid cracking catalyst particles into a flue gas ... | 07/13/2010 |
| 7727499 | Ammonia oxidation catalyst for power utilities The present invention is directed to a method for removal by oxidation of the excess ammonia (NH3) gas (“ammonia slip”) resulting from flue gases that have been subjected to selective catalytic reduction (SCR) for reduction of nitrogen oxides (NOx) wi... | 06/01/2010 |
| 7722845 | Bifunctional catalysts for selective ammonia oxidation Catalysts, methods, and systems for treating diesel engine exhaust streams are described. In one or more embodiments, the catalyst comprises platinum, a second metal from one of the groups VB, VIB, VIIB, VIIIB, IB, or IIB of the periodic table, a refractory metal ox... | 05/25/2010 |
| 7722829 | Pressure-balanced, catalyzed soot filter The invention provides a catalyzed soot filter formed on a wall flow substrate having internal walls coated with catalyst compositions. The soot filter maintains a homogeneous flow of the exhaust gases through the internal walls of the substrate along the length of ... | 05/25/2010 |
| 7704920 | Pollutant emission control sorbents and methods of manufacture Sorbents for removal of mercury and other pollutants from gas streams, such as a flue gas stream from coal-fired utility plants, and methods for their manufacture and use are disclosed. The methods include mixing sorbent substrate particles with a sulfide salt and a... | 04/27/2010 |
| 7704915 | Methods for preparing coated metal substrates A coated metal substrate useful for carrying an exhaust emission treatment catalyst such as a three-way conversion catalyst for use with small engine platforms. The coated metal substrate comprises a metal such as a stainless steel, a carbon steel, a FeCr alloy, HAS... | 04/27/2010 |
| 7704475 | Zeolite catalyst with improved NOx reduction in SCR The present invention is directed to a novel metal-promoted zeolite catalyst, a method of producing the catalyst and a method of using the catalyst for the selective catalytic reduction of NOx with improved hydrothermal durability. The novel metal-promoted zeolite i... | 04/27/2010 |
| 7678347 | High phosphorous poisoning resistant catalysts for treating automobile exhaust The present invention discloses novel catalysts for treating automobile exhaust that have increased resistance to poisoning from oil- and/or fuel-derived additives. In the catalysts of this invention, the catalytic materials are not coated onto a front-end poison ca... | 03/16/2010 |
| 7673448 | Diesel exhaust article and catalyst compositions therefor A self-cleaning diesel exhaust particulate filter system is disclosed wherein burn-off of collected particulate matter is accomplished at normal exhaust gas temperatures, the filter system being provided with a catalyst mixture of a co-formed ceria-zirconia composit... | 03/09/2010 |
| 7622096 | Multilayered catalyst compositions A layered three-way conversion catalyst having the capability of simultaneously catalyzing the oxidation of hydrocarbons and carbon monoxide and the reduction of nitrogen oxides is disclosed. Engine exhaust treatment system and methods of using the same are also pro... | 11/24/2009 |
| 7601662 | Copper CHA zeolite catalysts Zeolite catalysts and systems and methods for preparing and using zeolite catalysts having the CHA crystal structure are disclosed. The catalysts can be used to remove nitrogen oxides from a gaseous medium across a broad temperature range and exhibit hydrothermal st... | 10/13/2009 |
| 7578869 | Methods of manufacturing bentonite pollution control sorbents Methods of manufacturing bentonite sorbents for removal of pollutants including mercury from gas streams, such as a flue gas stream from coal-fired utility plants are disclosed. The methods include mixing bentonite sorbent particles with a sulfide salt and a metal s... | 08/25/2009 |
