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Class 204/177 - Nitrogen compounds


Subclass of Class 204 - Chemistry: electrical and wave energy
Definition: Processes directed to the production of inorganic nitrogen
No. of patents: 102
Last issue date: 12/25/2007


1      
NumberTitleIssue Date
7311887Hybrid wet and dry electrostatic precipitator ammonia scrubber
A process reduces SOx emissions in a flue gas stream by adding a wet collector plate section to an existing electrostatic precipitator (ESP) or by converting the last field of an existing ESP to wet operation. To achieve the conversion, the last field or ...
12/25/2007
7272925NOreduction in lean burn engine exhaust
The nitric oxide (NO) and nitrogen dioxide (NO2) content of lean-burn engine exhaust is beneficially prepared for selective catalytic reduction (SCR) of these oxides to nitrogen by two sidestream additions to the exhaust. An ozone-containing air stream is...
09/25/2007
7255844Systems and methods for synthesis of gallium nitride powders
A method of producing high quality GaN powder by combining high purity gallium and high purity ammonia in a tube reactor under controlled conditions. A reaction between the ammonia and gallium under the controlled conditions produces a porous gallium melt and to a f...
08/14/2007
7163663Reactor for plasma assisted treatment of gaseous
A plasma reactor (11) of the silent discharge or dielectric barrier type for treatment of a gaseous medium is provided with a layer of material (34) positioned to present a surface extending along at least part of the length of the gas flow path. Parti...
01/16/2007
7156959Plasma based trace metal removal apparatus and method
A system and method for the removal of metals such as mercury from a gas stream. The method involves contacting a gas stream containing the target metals with reactive chemical species generated in a plasma device. The metal to be removed is chemically converted int...
01/02/2007
7078000Apparatus and method for mat protection of non-thermal plasma reactor
A non-thermal plasma reactor is provided. The non-thermal plasma reactor includes a plasma-generating substrate, a housing and a mat. The plasma-generating substrate has one or more flow paths for an exhaust gas. The housing has an inlet and an outlet. The mat retai...
07/18/2006
7074370Plasma assisted reactor
A plasma assisted reactor for the removal of carbonaceous combustion products or for simultaneous removal of carbonaceous products and nitrogen oxides from the exhaust emissions from an internal combustion engine, wherein the reactor includes a gas permeable bed mad...
07/11/2006
7067092Treatment 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, the exhaust gases pass. In the presence of an electrical discharge, ...
06/27/2006
7063819Nonthermal plasma processor utilizing additive-gas injection and/or gas extraction
A device for processing gases includes a cylindrical housing in which an electrically grounded, metal injection/extraction gas supply tube is disposed. A dielectric tube surrounds the injection/extraction gas supply tube to establish a gas modification passage there...
06/20/2006
7060231Plasma reactor having regions of active and passive electric field
A plasma reactor for automotive exhaust gas applications which efficiently promotes diffusion, mass transfer and chemical reaction processes of atoms, ions and radicals, in that the ground (outer) electrode has an axially discrete pattern which provides alternating ...
06/13/2006
7048899Removing NOx, SO, and Hg from a gas stream using limestone regeneration
A process and apparatus for removing SO2, NO, and NO2 from a gas stream having the steps of oxidizing a portion of the NO in the flue gas stream to NO2, scrubbing the SO2, NO, and NO2 with an ammonia, ammonium h...
05/23/2006
7029636Electrode discharge, non-thermal plasma device (reactor) for the pre-treatment of combustion air
A device for the pre-treatment of combustion air by exposure to non-thermal plasma at substantially atmospheric pressure and a method for operating the same. The device includes an inner electrode having a longitudinal channel defined therein to receive a fuel. An o...
04/18/2006
7011796Plasma assisted catalytic treatment of gases
A catalytic material for the plasma-assisted treatment of the exhaust gases from internal combustion engines, consisting of an activated alumina, which contains silver or molybdena (MoO3). For silver doped alumina, a preferred silver concentration is betw...
03/14/2006
7011790Non-thermal disinfection of biological fluids using non-thermal plasma
A method and apparatus are provided for at least partially disinfecting biological fluid of a mammal, which comprises pathogens in addition to normal cellular fractions. The method includes placing the biological fluid in a reaction volume and contacting a non-therm...
03/14/2006
6998027Highly efficient compact capacitance coupled plasma reactor/generator and method
A compact capacitively coupled electrode structure for use in a gas plasma reactor/generator is disclosed. The electrode structure comprises a parallel plate type anode and cathode spaced to define a gas flow path or volume therebetween. A plurality of electrically ...
02/14/2006
6994830Reactor for plasma treatment of gases
In a non-thermal plasma reactor (300), at least a component of the active material (320) is selected or modified to provide the capability to adsorb or trap a predetermined chemical species in the gas flow thereby to increase the effective residence ti...
02/07/2006
6969494Plasma based trace metal removal apparatus and method
A system and method for the removal of metals such as mercury from a gas stream. The method involves contacting a gas stream containing the target metals with reactive chemical species generated in a plasma device. The metal to be removed is chemically converted int...
11/29/2005
6955790Apparatus for plasma-chemical production of nitrogen monoxide
A method and an apparatus for plasma-chemical production of nitrogen monoxide is used to produce inhalation gas enriched with nitrogen monoxide for medical purposes. The nitrogen-monoxide production is achieved through the use of a dielectric barrier discharge creat...
10/18/2005
6955794Slot discharge non-thermal plasma apparatus and process for promoting chemical reaction
A plasma reactor including a first dielectric having at least one slot defined therethrough, and a segmented electrode including a plurality of electrode segments, each electrode segment is disposed proximate an associated slot. Each electrode segment may be formed ...
10/18/2005
6921516Reactor system including auto ignition and carbon suppression foam
A reactor system including a reactor housing having an inlet portion defined at one end of the housing and having a discharge opening formed in the housing at an opposite end. An air intake charge line is connected to the housing for charging air into the inlet port...
07/26/2005
6911225Method and apparatus for non-thermal pasteurization of living-mammal-instillable liquids
A non-thermal plasma reactor is provided for treating a liquid with non-thermal plasma species. The reactor includes a liquid inlet, a liquid outlet, a reaction volume between the liquid inlet and the liquid outlet and at least one non-thermal plasma electrode adjac...
06/28/2005
6906280Fast pulse nonthermal plasma reactor
A fast pulsed nonthermal plasma reactor includes a discharge cell and a charging assembly electrically connected thereto. The charging assembly provides plural high voltage pulses to the discharge cell. Each pulse has a rise time between one and ten nanoseconds and ...
06/14/2005
6852200Non-thermal plasma reactor gas treatment system
A gas treatment system and method for using the same is disclosed. The gas treatment system, comprises: a non-thermal plasma reactor; and a catalyst composition disposed within said non-thermal plasma reactor, said catalyst composition comprising a MZr4(P...
02/08/2005
6835358Non-thermal plasma reactor for lower power consumption
A system and method for treating a combustion exhaust stream includes admitting an exhaust stream into a non-thermal plasma reactor having at least one segmented non-thermal plasma element including a plurality of individually energizable electrode segments defining...
12/28/2004
6818193Segmented electrode capillary discharge, non-thermal plasma apparatus and process for promoting chemical reactions
A plasma reactor including a first dielectric having at least one capillary defined therethrough, and a segmented electrode including a plurality of electrode segments, each electrode segment is disposed proximate an associated capillary. Each electrode segment may ...
11/16/2004
6787002Compact plasma reactor
A device for purifying an exhaust gas contains at least one first and one second component with a respective shell and core through which the exhaust flows, as well as with two front faces each. At least one of the front faces of the first component and at least one...
09/07/2004
6716398Method and apparatus for using hydroxyl to reduce pollutants in the exhaust gases from the combustion of a fuel
A method and apparatus are provided for reducing pollutants in the exhaust gases produced from the combustion of a fuel by introducing hydroxyl and associated radicals and oxidizers into at least one of the precombustion and postcombustion gas stream of the combusti...
04/06/2004
6649132Process for the removal of impurities from gas streams
The present invention relates to a process for removing nitrogen oxides, sulfur dioxides and mercury from gas streams such as furnace or utility boiler flue gas streams, particularly those derived from coal-fired utility boilers. A stream containing relat...
11/18/2003
6524538Method and apparatus for plasma treatment of gas
A method and an apparatus for plasma treatment of gas, particularly for transformation, passivation and stabilization of polluting and toxic admixtures is disclosed. A flowing gas (1) to be treated is passed through a hollow cathode (2) provided with a co...
02/25/2003
6482368Non-thermal plasma reactor for lower power consumption
A dielectric barrier discharge non-thermal plasma reactor system and method for treating a combustion exhaust stream includes admitting an exhaust stream into a non-thermal plasma reactor having at least one segmented non-thermal plasma element including ...
11/19/2002
6479023System for converting particulate matter in gasoline engine exhaust gases
A system for converting particulate matter in exhaust gases, which system comprises a stoichiometrically-operated engine and an exhaust system including a plasma generator for converting water vapor in the exhaust gases into an oxidant and a filter downst...
11/12/2002
6475350Method for removing NOx and other pollutants from gas streams using a plasma assisted catalyst
An apparatus and a method for removing pollutants from gas streams using a reactor assembly. The reactor assembly includes an inlet, an outlet, at least two electrodes, a catalyst bed, and plasma generated from the electrodes. Electrical energy is applied...
11/05/2002
6432280Pollution control device
A pollution control apparatus and method reduces contaminants, such as NOx and SOx pollutants, from an effluent gas stream. The pollution control device includes a resonance chamber that ionizes the effluent gas stream. The contamina...
08/13/2002
6423190Pulse density modulation for uniform barrier discharge in a nonthermal plasma reactor
An exhaust treatment system is provided for use with an internal combustion engine of a motor vehicle. The exhaust treatment system includes a parallel plate, monolithic plasma reactor for reducing nitrogen oxides in the exhaust gas from the engine, an el...
07/23/2002
6368468Zirconia based article, use of such an article as a wear resistant exterior part for a wristwatch and method for obtaining such an article
A zirconia based article having a core of ZrO2 and/or partially reduced ZrO2, is characterized in that it includes, over at least part of its surface, a superficial layer integral with the article, the thickness of the superficial la...
04/09/2002
6357223Method and apparatus for enhancing the rate and efficiency of gas phase reactions
An apparatus and a method for enhancing the rate of a chemical reaction in a gas stream. The apparatus includes at least one heterogeneous catalyst having an upstream end and a downstream end, and at least one surface having a plurality of catalytically a...
03/19/2002
6330794Method and apparatus for using free radicals to reduce pollutants in the exhaust gases from the combustion of a fuel
The invention is directed to an apparatus and a method for the reduction of pollutants in the exhaust stream of a combustion engine. Radicals are produced using a corona discharge in the combustion gas stream of the engine, either in the precombustion gas...
12/18/2001
6309610Non-thermal plasma apparatus utilizing dielectrically-coated electrodes for treating effluent gas
An improved non-thermal plasma apparatus for treating NOx bearing gas streams has a plasma reactor and an inlet and outlet. The plasma reactor is equipped with a plurality of dielectrically-coated electrodes between which a selected voltage is ...
10/30/2001
6296827Method and apparatus for plasma-chemical production of nitrogen monoxide
A method and an apparatus for plasma-chemical production of nitrogen monoxide is used to produce inhalation gas enriched with nitrogen monoxide for medical purposes. The nitrogen-monoxide production is achieved through the use of a dielectric barrier disc...
10/02/2001
6238525Process for reducing the nitrogen oxides content of exhaust gas from an internal combustion engine
A process for reducing the nitrogen oxides content of the exhaust gas from an internal combustion engine includes treating the exhaust gas in an electric gas discharge such that at least one of nitrogen dioxide or nitric acid are formed from nitrogen oxid...
05/29/2001
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