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7390471 |
Apparatus and method for catalytic treatment of exhaust gases
An exhaust gas treatment apparatus ( 20 ) for reducing the concentration of NO x , HC and CO in an exhaust gas stream ( 18 ) such as produced by a gas turbine engine ( 12 ) of a power generating...
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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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7384615 |
Method oil shale pollutant sorption/NOx reburning multi-pollutant control
A method of decreasing pollutants produced in a combustion process. The method comprises combusting coal in a combustion chamber to produce at least one pollutant selected from the group consisting...
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7371357 |
Process for removal of pollutants
A process for the removal of pollutants from a combustion process and, more particularly, a process for removing pollutants such as carbon dioxide, mercury, sulphur dioxide, nitrogen compounds and...
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7368094 |
Plasma-assisted NOx reduction
Ozone, preferably produced in an ambient air stream passed through a non-thermal hyperplasma reactor, is added to the hot exhaust gas stream from a lean-burn (oxygen-rich) combustion source. The...
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7364711 |
Method for removing N2O during the production of nitric acid
N 2 O is removed in nitric acid manufacture by using catalysts comprising three-dimensional structures coated with catalytically active materials.
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7361321 |
Exhaust stream treatment
A method comprises injecting a reductant stream comprising a hydrocarbon reductant and water into an exhaust chamber comprising a nitrogen oxide-containing exhaust stream; contacting a composition...
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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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7361319 |
Mixed metal oxide sorbents
The present invention is directed to methods for reducing SOx, NOx, and CO emissions from a fluid stream comprising contacting said fluid stream with a compound comprising magnesium and aluminum...
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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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7357903 |
Method for reducing NOx during combustion of coal in a burner
An organically complexed nanocatalyst composition is applied to or mixed with coal prior to or upon introducing the coal into a coal burner in order to catalyze the removal of coal nitrogen from...
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7357901 |
Exhaust gas purification device for an internal combustion engine and exhaust gas purification method for an internal combustion engine
An internal combustion engine with an exhaust gas purification device is provided in which the NOx held in a NOx catalyst can be efficiently reduced and purified, and a sufficient amount of NOx can...
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7334400 |
Valveless dual leg exhaust aftertreatment system
An exhaust aftertreatment system comprising two or more branches, at least one of which contains a NOx adsorber-catalyst. The branches unite downstream into a trailing conduit that contains an...
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7332143 |
Targeted duct injection for SO3 control
NO x and SO 3 emissions from combustion of a sulfur containing carbonaceous fuel are reduced simultaneously. The combustion gases comprising NO x and SO 2 are mixed with a NO x control agent...
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7332142 |
Method and apparatus for bubble injection of agent into exhaust gas for use with emission abatement device
An apparatus comprises an exhaust system and an injection system. The injection system is configured to vaporize a first liquid portion of an agent into at least one bubble so as to inject a second...
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7320781 |
Method for adjusting a reductant used in an internal combustion engine to reduce NOx
A method for controlling reductant injection into an exhaust stream upstream of a catalyst coupled to an internal combustion engine is disclosed. In the method, an ammonia sensor located downstream...
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7306774 |
Reactive membrane process for the removal of vapor phase contaminants
Generally, the present invention provides a method and apparatus for removing a vapor phase contaminant from a gas stream, thereby reducing the concentration of the vapor phase contaminant in the...
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7300640 |
Method for clarifying exhaust gas
A cleaning process of exhaust gas which includes the steps of bringing the exhaust gas containing at least one of nitrogen oxides or organic solvent into contact with a cleaning agent including...
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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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7273595 |
Method and apparatus for the production of gaseous ammonia from a urea solution
A safe, economical and predictable process for producing ammonia from a urea solution, preferably where only a small amount of ammonia is required, (i.e. for SCR denitrification for small boilers,...
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7264785 |
Selective catalytic reduction
A method of selectively catalysing the reduction of NO x in an exhaust gas flowing in an exhaust system of an internal combustion engine comprising a filter ( 40 ) for particulate matter...
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7264784 |
Method for treating exhaust gas
An object of the present invention is to provide a new method for treating an exhaust gas, which can effectively treat an exhaust gas containing a nitrogen oxide and metal mercury over a long term,...
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7259121 |
Method of reducing the N2O content of gases and selected catalysts
A method of reducing the N 2 O content in gases is described. A selected zeolite catalyst is used in the method. This catalyst is present in the H form and/or contains exchanged iron and is...
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7255842 |
Multi-component removal in flue gas by aqua ammonia
A new method for the removal of environmental compounds from gaseous streams, in particular, flue gas streams. The new method involves first oxidizing some or all of the acid anhydrides contained...
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7241431 |
Method and emission control system for catalytically reducing nitrogen oxides in the exhaust gas of a combustion system
A method and an emission control system are for catalytically reducing nitrogen oxides in the exhaust gas of a combustion system, especially a diesel motor. An oxidation catalyst is arranged...
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7238332 |
Material and process for the filtration of nitric acid and NO2 from streams of air
A material for filtering NO 2 and nitric acid vapors from air over a wide range of humidities and temperatures including a porous hydrophobic substrate and an amine is provided.
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7238223 |
Acoustical stimulation of vapor diffusion system and method
An apparatus for removing constituents from a fluid stream is provided. The apparatus includes a duct, a collection device, a sorbent injector, and an acoustic generator. The duct has a fluid...
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7235223 |
Method for operating a flue gas purification plant
In a method for operating a flue gas purification plant ( 10 ) including a plurality of parallel of absorber chambers ( 11 ), in which in each absorber chamber ( 11 ), CO and NO are simultaneously...
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7235222 |
Process for treating waste anesthetic gas
To provide a process and an apparatus for treating a waste anesthetic gas containing a volatile anesthetic and nitrous oxide discharged from an operating room by introducing the gas into an...
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7223375 |
Emission control systems and methods thereof
A method and system for controlling one or more emissions includes introducing ammonia to react with at least a portion of sulfur trioxides in an exhaust emission and result in at least one or more...
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7220395 |
Methods for the production of ammonia from urea and/or biuret, and uses for NOx and/or particulate matter removal
This patent describes technology for generating ammonia from urea. The method is based on the hydrolysis of an aqueous solution of urea and/or biuret by heating under pressure to form a mixture of...
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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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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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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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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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