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7213395 |
Hybrid catalyst system for exhaust emissions reduction
One aspect of the invention relates an exhaust treatment system having an SCR reactor following a NOx adsorber. Syn gas is used to regenerate the NOx adsorber. Another aspect relates to an LNT/SCR...
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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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7198769 |
Multi-stage process for SCR of NOx
A selective catalytic reduction apparatus has at least first and last catalyst layers in series for reducing nitrogen oxides in a flue gas, at least one interstage heat exchanger located after the...
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7179767 |
Small-volume NOx adsorber
A support body is described which has an adsorber material for adsorbing nitrogen oxides in an exhaust gas which is generated in at least one combustion chamber of an internal-combustion engine. A...
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7175822 |
Method for catalytic reduction of nitrogen oxides
The invention provides a catalyst structure for catalytic reduction of nitrogen oxides in exhaust gases by supplying and subjecting fuel to combustion with periodic rich/lean excursions and...
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7175821 |
Reactor and process for reducing emissions of CO and NOx
The current invention provides systems and method for reducing emissions of gaseous pollutants such as carbon monoxide, nitric oxide and nitrogen dioxide. The invention utilizes at least one...
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7166262 |
Control for ammonia slip in selective catalytic reduction
A method of operating a selective catalytic reduction (SCR) system includes detecting at least one of an ammonia level and a nitrogen oxide level within a cross-sectional area of a chamber at a...
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7163668 |
Hydrogen selective catalytic reduction for NOx
An emission control system for reducing NO x in the exhaust of a diesel engine. A partial oxidation system receives diesel fuel from the engine's fuel tank and partially oxidizes the diesel fuel...
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7156957 |
UV induced oxidation of nitric oxide
Nitric oxide in a gaseous stream is converted to nitrogen dioxide using oxidizing species generated at least in part using in situ UV radiation sources. The sources of the oxidizing species include...
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7153810 |
Silver doped catalysts for treatment of exhaust
A method of making an exhaust treatment catalyst includes dispersing a metal-based material in a first solvent to form a first slurry and allowing polymerization of the first slurry to occur....
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7146802 |
Reducing NOx emissions with a staged catalyst
The conversion of NO x to nitrogen in the exhaust of a lean burn engine using a hydrocarbon assisted-selective catalytic reduction system is benefited by a two-stage oxidation catalyst-reduction...
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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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7125531 |
Single stage denitration
A system and method is described having a single reaction vessel ( 12 ) using superheated stream optionally augmented by oxygen for reducing nitrogen oxides present in a wide variety of organic...
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7119044 |
Multiple washcoats on filter substrate
An integrated multi-functional catalyst system includes a diesel particulate filter having an inlet side for receiving flow and an opposite outlet side, a substrate in the diesel particulate filter...
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7118720 |
Method for combined removal of mercury and nitrogen oxides from off-gas streams
A method for removing elemental Hg and nitric oxide simultaneously from a gas stream is provided whereby the gas stream is reacted with gaseous chlorinated compound to convert the elemental mercury...
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7118721 |
Method for treating emissions
A method for removing pollutants from flue gas generated by a plant having one or more burners located at an inlet end of a vertically extending stack, the flue gas being discharged through an...
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7105137 |
Catalyst for the reduction of NO to N2 with hydrogen under NOx oxidation conditions
The invention relates to a novel catalyst having excellent activity, selectivity and stability for reducing nitric oxide to gas nitrogen, with hydrogen being used as a reducing agent, in the low...
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7101531 |
Fuel reforming system and control therefor
A fuel reforming system has a reformer ( 4 ) for reforming a fuel to produce a reformate gas; a shift converter ( 5 ) for reacting carbon monoxide (CO) contained in a reformate gas with water to...
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7097817 |
Method for treating soot-containing exhaust
A wall-flow filter ( 10 ) for an exhaust system of a combustion engine comprises: a plurality of channels ( 4,6,8 ) in honeycomb arrangement, wherein at least some of the channels ( 6 ) are plugged...
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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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7083765 |
Catalysts for lean burn engine exhaust abatement
The present invention provides a process for catalytically reducing nitrogen oxides in an exhaust gas stream containing nitrogen oxides and a reductant material by contacting the gas stream under...
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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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7074378 |
Process for the purification of NF3
This invention describes an improvement in a process for purifying a nitrogen trifluoride (NF 3 ) stream containing unreacted F 2 , HF, and nitrogen oxides from an NF 3 reactor wherein the F 2 ,...
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7070746 |
Process for nitrous oxide purification
A method for purification of an oxygen contaminated nitrous oxide gas by feeding the nitrous oxide gas and a reducing agent such as hydrogen, carbon monoxide or ammonia into a de-oxidation reactor,...
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7067092 |
Treatment of gaseous emissions
A reactor chamber forms part of an exhaust system of an internal combustion engine. Within the chamber are electrodes between which there is disposed a bed of active material through which, in use,...
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7067319 |
System for diagnosing reagent solution quality and emissions catalyst degradation
A system for determining a reagent solution quality indicator includes a reagent solution source for supplying the reagent solution to an emissions catalyst configured to receive a NOx-containing...
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7063817 |
Device for cleaning flue gas
Flue gas, in particular from a steam generator, requires cleaning. A catalytic converter for deNOxing the flue gas, which is used, for example, to heat an air preheater, is often employed for this...
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7056478 |
Emission treatment system
An emission treatment system for removing NO x from flue gas includes a diversion member that closes the stack at a position intermediate the inlet and outlet ends. A major component module...
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7041263 |
Catalyst composition for purifying exhaust gas
The present invention relates to a composite of cerium, zirconium and samarium components, a catalyst composition containing such composite and the use of the catalyst composition for the treatment...
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7033547 |
Exhaust gas treating apparatus and vehicle equipped with the apparatus
An exhaust gas treating an apparatus and a vehicle vehicles equipped with the apparatus, wherein a liquid-including substance having salt including oxygen acid radical of nitrogen is installed in...
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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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7014692 |
Scrubber
A scrubber for eliminating NO from air flowing through the scrubber, comprising a housing ( 1 ) having at least one inlet hole ( 2 ) and an outlet hole ( 4 ) and which is comprising filtering...
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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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7011801 |
Method for the simultaneous removal of nitrogen oxides and laughing gas from a gas stream containing nitrogen oxides and laughing gas
A method for the simultaneous removal of nitrogen oxides and laughing gas from a stream containing nitrogen oxides and laughing gas, wherein a first catalyst that contains cobalt and, as support,...
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7011800 |
Single stage denitration
A system and method using superheated steam optionally augmented by oxygen for the reduction of nitrogen oxides present for reducing nitrogen oxides present in a wide variety of organic compounds....
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7005116 |
Process 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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7000382 |
Partial oxidation of alcohols
A method of partially oxidizing an alcohol to an aldehyde or ketone comprises contacting a gas containing the alcohol with a solid catalyst containing molybdenum, preferably in a +6 oxidation...
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6979430 |
System and method for controlling NOx emissions from boilers combusting carbonaceous fuels without using external reagent
A system and a method for controlling NO X emissions from a boiler that combusts carbonaceous fuels. The method includes the steps of (a) introducing carbonaceous fuel and combustion air into a...
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6958136 |
Process for the treatment of waste streams
The present invention is directed to a process for treating, reducing, and/or stabilizing various wastes or flue gases. In one embodiment, the process is directed to treatment of alkali bearing...
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6953558 |
Process for reducing nitrogen oxide emissions
A non-catalytic process for reducing nitrogen oxide (NO x ) emissions in the combustion effluent of a stationary combustion apparatus is provided comprising contacting, in the combustion zone of...
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6948308 |
Combatting air pollution
In the control of pollutants such as NO x in the exhaust gases from internal combustion engines, ozone is reacted with NO to form NO 2 , which is then reduced catalytically to N 2 .
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6946107 |
Conversion of nitrogen oxides in the presence of a catalyst supported on a mesh-like structure
An apparatus for converting at least one nitrogen oxide, such as NO, O 2 , or N 2 O converts oxide in the presence of a catalyst supported on a metal mesh-like structure. The mesh-like structure is...
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6941742 |
Method and device for reducing the number of particles in an exhaust gas
To reduce the number of particles in an exhaust gas (A), in particular in the exhaust gas (A) from an internal-combustion engine, sulfur dioxide SO 2 which is contained in the exhaust gas (A) is...
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6936232 |
Process and apparatus for removing NOx from engine exhaust gases
A method and apparatus for removing nitrogen oxides from internal combustion engine exhaust emissions consisting of the operations of contacting the exhaust emissions with a non-thermal plasma ( 1...
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6928807 |
Method and apparatus for producing ammonia (NH3)
A method is provided for producing ammonia (NH 3 ) and introducing the produced ammonia (NH 3 ) into an exhaust gas stream as a reduction means for selectively catalytically reducing nitrogen...
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6926875 |
Porous material process of producing the porous material, catalyst for purifying exhaust gas comprising the porous material, method of purifying exhaust gas
Disclosed are a porous material comprising particles without substantial fibrous structure and having pores, the pores having a mean pore diameter in a meson-pore region, sharp pore size...
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6923945 |
Layered SOX tolerant NOX trap catalysts and methods of making and using the same
The present invention relates to a layered catalyst composite useful for reducing contaminants in exhaust gas streams, especially gaseous streams containing sulfur oxide contaminants. More...
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6916457 |
Preparation and use of non-chrome catalysts for Cu/Cr catalyst applications
A non-chrome, copper-containing catalyst, Cu—Al—O and method of preparing the same are provided wherein the Cu—Al—O catalyst is prepared by the co-precipitation of copper nitrate (Cu(NO 3 )...
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