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7390469 |
Bimodal catalyst-urea SCR system for enhanced NOx conversion and durability
The present invention discloses a method for reducing NO x in exhaust gases of an internal combustion engine. The purpose of this invention is to convert engine out NO x (approximately 90% NO in...
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7384612 |
Diesel exhaust gas purifying filter
An exhaust cleanup filter which, even if the exhaust temperature is low as during vehicular driving under low load, can trap PM efficiently to prevent clogging by PM buildup and which also is...
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7371358 |
Catalyst for treatment and control of post-combustion emissions
The present invention utilizes two precious metals with two to five different metal-oxides in a layered matrix to convert CO, HCs, and NOx to CO 2 , and N 2 by oxidation of two components and...
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7361320 |
Exhaust gas purification unit with reducing agent supply
The invention proposes an exhaust-gas purification unit for purifying the exhaust gas from an internal combustion engine which is preferably operated in lean-burn mode, in particular a diesel...
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7357904 |
Reduction of oxides of nitrogen in a gas stream using molecular sieve SSZ-74
The present invention relates to new crystalline molecular sieve SSZ-74 prepared using a hexamethylene-1,6-bis-(N-methyl-N-pyrrolidinium)dication as a structure-directing agent, and its use in the...
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7287370 |
NOx-trap
A NOx-trap composition comprises: (a) at least one first NOx storage component comprising at least one alkali metal supported on at least one first support material; and (b) a platinum oxidation...
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7235221 |
NOx catalyst and method of suppressing sulfate formation in an exhaust purification system
The activity and durability of a zeolite lean-burn NOx catalyst can be increased by loading metal cations on the outer surface of the zeolite. However, the metal loadings can also oxidize sulfur...
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7226569 |
Reduction of oxides of nitrogen in a gas stream using molecular sieve SSZ-56
The present invention relates to new crystalline molecular sieve SSZ-56 prepared using a N,N-diethyl-2-methyldecahydroquinolinium cation as a structure-directing agent, methods for synthesizing...
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7211232 |
Refractory exhaust filtering method and apparatus
A method for catalytically cleaning an exhaust gas, including receiving the exhaust gas in an inlet channel, blocking the exhaust gas in the inlet channel, diffusing the exhaust gas through a...
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7210288 |
Exhaust gas aftertreatment installation and method
An exhaust gas aftertreatment installment and associated exhaust gas aftertreatment method utilizes a nitrogen oxide storage catalytic converter and an SCR catalytic converter. A particulate filter...
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RE39553 |
SOx tolerant NOx trap catalysts and methods of making and using the same
The present invention relates to sulfur tolerant catalyst composites useful for reducing contaminants in exhaust gas streams, especially gaseous streams containing sulfur oxide contaminants. More...
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7150861 |
Catalyst for purification of exhaust gases and process for purification of exhaust gases
A catalyst for purification of CO-containing exhaust gases, includes a metal oxide as a support and a catalytic component A being supported thereon as a catalytic component and including a specific...
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7141526 |
Exhaust gas purifying catalyst and process for purifying exhaust gas by use of the catalyst
An exhaust gas purifying catalyst characterized by having zeolite subjected to ion exchange with cerium and deposited on cerium oxide as well and containing platinum and/or palladium, and a process...
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7138097 |
Reduction of oxides of nitrogen in a gas stream using molecular sieve SSZ-73
The present invention relates to new crystalline, essentially all silicon oxide molecular sieve SSZ-73 prepared using a 3-ethyl-1,3,8,8-tetramethyl-3-azoniabicyclo[3.2.1]octane cation as a...
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7137249 |
Thermally stable lean nox trap
The present invention provides a method of removing harmful gases from an automobile exhaust. The method of the invention comprises contacting a thermally stable NO x trap composition with a first...
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7094722 |
NOx catalyst and method of suppressing sulfate formation in an exhaust purification system
The activity and durability of a zeolite lean-bum NOx catalyst can be increased by loading metal cations on the outer surface of the zeolite. However, the metal loadings can also oxidize sulfur...
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7083766 |
Reduction of oxides of nitrogen in a gas stream using molecular sieve SSZ-71
The present invention relates to new molecular sieve SSZ-71 prepared using a N-benzyl-1,4-diazabicyclo[2.2.2]octane cation as a structure-directing agent, methods for synthesizing SSZ-71 and...
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7078004 |
Diesel oxidation catalyst
The present invention relates to a method and article for treating a diesel engine exhaust stream. The stream is contacted with an upstream catalytic composition having a cerium component and/or a...
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7033558 |
Method for eliminating traces of hydrocarbons from gas streams
The invention refers to a method for removing traces of hydrocarbons, particularly propane, from gas flows. The conversion of hydrocarbons into carbon oxides is achieved by loading suitable carrier...
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7022297 |
Method and system for purifying or cleansing a gas stream or gaseous body
A method and system for eliminating, in whole or in part, contaminants in a gas stream or gaseous body such as air or an exhaust gas or gas emission stream is provided. The method includes the...
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7014825 |
Perovskite-type metal oxide compounds and methods of making and using thereof
Perovskite-type catalyst consists essentially of a metal oxide composition and methods of using them are provided. The metal oxide composition is represented by the general formula A a−x B x MO b...
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6912847 |
Diesel engine system comprising a soot filter and low temperature NOx trap
The invention provides low temperature NO 2 trap compositions useful for adsorbing NO 2 from a gas stream at lower temperatures, and releasing the NO 2 at higher temperatures. The low...
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6893997 |
Exhaust gas purifying catalyst and method for purifying exhaust gas
An exhaust gas purifying catalyst including a catalyst component containing a refractory inorganic oxide carrying a platinum family metal, a nitrogen oxide adsorbent, and a hydrocarbon adsorbent...
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6887443 |
Exhaust gas purifying catalyst and method for purifying exhaust gas
An exhaust gas purifying catalyst comprises a catalytic ingredient including rhodium, at least one of platinum and palladium, at least one of absorption materials for absorbing NOx, a porous...
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6883305 |
Method for cleaning exhaust gas from an internal combustion engine
In a method and apparatus for removing nitrogen oxides from the exhaust gas of a lean-burn automobile, a CO adsorbent component, which may, for example be made of Pd, Ru or Ir, is contained in an...
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6875725 |
Exhaust-gas purification catalyst to be used close to the engine and process for its production
A starter catalyst for the purification of the exhaust gases from internal combustion engines, which include palladium on aluminum oxide and of barium oxide, as well as a process for its...
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6866834 |
NOx reduction catalyst and NOx reduction system
A NOx reduction catalyst for exhaust gas discharged from an automotive internal combustion engine operable in a lean region and in a range including a stoichiometric region and a rich region. The...
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6864214 |
Exhaust gas purifying catalyst
To provide an exhaust gas purifying catalyst that requires a smallest possible quantity of rhodium for developing the activity effectively, so as to produce an excellent purifying performance...
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6863874 |
Process and apparatus for treating combustion exhaust gas
A system and method for the control of emissions from a diesel engine exhaust, comprises a catalyst ( 14 ) to convert NO to NO 2 , a filter ( 16 ) to trap soot and hold it for combustion with the...
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6858193 |
Catalyst for lowering the amount of nitrogen oxides in the exhaust gas from lean burn engines
The invention relates to a catalyst for lowering the amount of NO x in the lean exhaust gas from lean burn engines, comprising active aluminum oxide, magnesium oxide and at least one noble metal...
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6843971 |
Process and catalyst for reducing nitrogen oxides
A process for reducing the nitrogen oxides present in a lean exhaust gas from an internal combustion engine by selective catalytic reduction on a reduction catalyst using ammonia, wherein a...
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6843817 |
Ceramic filter and filter device
The present invention provides a ceramic filter to be used at a high temperature, and it contains a substance having preferential reactivity with an ash component contained in materials captured by...
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6806225 |
Catalyst for exhaust gas purification, process for producing the same, and method of purifying exhaust gas
An NO x storage member including at least one member selected from the group consisting of alkali metals, alkaline-earth metals and rare-earth elements, and at least one noble metal selected from...
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6797247 |
Material with a channel structure for eliminating oxides of nitrogen
The invention concerns materials for eliminating oxides of nitrogen NO and NO 2 present in exhaust gases, in particular from the internal combustion engines of automotive vehicles operating in a...
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6786041 |
Exhaust gas purification method and exhaust gas purification apparatus
A particulate filter ( 22 ) is arranged in an exhaust passage of an engine. When an amount of discharged particulate discharged from a combustion chamber ( 5 ) per unit time exceeds an amount of...
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6776973 |
Using molecular sieve SSZ-63 for reduction of oxides of nitrogen in a gas stream
The present invention relates to new crystalline molecular sieve SSZ-63 prepared using N-cyclodecyl-N-methyl-pyrrolidinium cation as a structure-directing agent, methods for synthesizing SSZ-63 and...
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6774080 |
Gas treatment device comprising SMSI material and methods for making and using the same
A gas treatment device, comprises a substrate disposed within a shell. The substrate comprises a catalyst composition comprising a support, a catalyst, and a sufficient amount of SMSI material such...
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6770252 |
Rolling regeneration diesel particulate trap
A rolling regeneration diesel particulate filter and filtering process that utilizes NO produced in the process to generate additional amounts of NO 2 than the NO 2 produced by the diesel engine....
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6764665 |
Layered catalyst composite
The present invention relates to a layered catalyst composite of the type generally referred to as a three-way conversion catalyst having the capability of simultaneously catalyzing the oxidation...
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6764664 |
Catalyst for the combustion of diesel soot, methods for making the catalyst and methods of using the catalyst
A catalyst composition is disclosed for the reduction of soot and undesirable gaseous emissions from engine exhaust, particularly exhaust from diesel engines. The catalyst contains an alkali metal...
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6709644 |
Small crystallite zeolite CHA
The present invention relates to zeolites having the crystal structure of chabazite (CHA) and having small crystallite size, to processes using the small crystallite CHA as a catalyst, and to gas...
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6699448 |
SOx tolerant NOx trap catalysts and methods of making and using the same
The present invention relates to sulfur tolerant catalyst composites useful for reducing contaminants in exhaust gas streams, especially gaseous streams containing sulfur oxide contaminants. More...
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6696031 |
Treatment of exhaust gas
A process for treating exhaust gas from internal combustion engines wherein the combustion exhaust gas contains HC, CO, O 2 , soot and possibly NO x . In treating the combustion exhaust gas, HC is...
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6685900 |
Catalyst for purifying the exhaust gases of diesel engines, and process for the preparation thereof
A catalyst for purifying the exhaust gases of diesel engines, which catalyst contains at least one zeolite and, additionally, at least one of the support oxides aluminum oxide, silicon dioxide,...
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6685899 |
Catalyst and method for purifying exhaust gas from vehicle engines
A catalyst, method, and exhaust system for purifying exhaust gas from vehicle engines, including a catalyst having a carrier doped with copper oxide (CuO), and a precious metal as a main catalyst...
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6667018 |
Catalyst-adsorbent for purification of exhaust gases and method for purification of exhaust gases
A catalyst-adsorbent for purification of exhaust gases, including a monolithic carrier and a catalyst-adsorbent layer formed thereon, the catalyst-adsorbent layer including a catalyst for reduction...
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6655128 |
Purging of an NOx trap
A lean burn engine having a lean NOx trap in the form of a matrix of narrow flow passages is described. The engine is provided with means for injecting reducing gases upstream of the NOx trap...
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6641785 |
Catalytic converter and method for cleaning exhaust gas
The invention relates to a catalytic converter and a method for cleaning the exhaust gas from an internal combustion engine which is operated with excess air. The catalytic converter has an active...
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6630115 |
Exhaust emission control process for internal combustion engines
In an exhaust gas purification process for eliminating nitrogen oxides contained in a combustion exhaust gas emitted from an internal combustion engine with a reducing gas such as carbon monoxide,...
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6627167 |
Catalyst for automotive lean-burn engine and process for preparing the same
The present invention relates to a catalyst for automotive lean-burn engine comprising platinum impregnated on a zeolite support and a process for preparing the same. In accordance with the...
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