Class 204/179 - Nitrogen oxides

Subclass of Class 204 - Chemistry: electrical and wave energy
Definition: Processes directed to the production of nitrogen oxides.
No. of patents: 44
Last issue date: 08/22/2006

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Number	Title	Issue Date
7093429	Reforming diesel fuel for NOx reduction The selective catalytic reduction of nitrogen oxides (especially NO and NO2) in exhaust from diesel and other lean burn engines is improved by use of a compact hyperplasma reactor for generating ozone and other highly oxidizing species in a stream of air....	08/22/2006
7090811	Method of reducing NOx in diesel engine exhaust This invention provides a method of reducing nitrogen oxides in an oxygen containing exhaust stream using ethanol as a reductant for plasma-assisted selective catalytic reduction. The exhaust gas, generated from a diesel engine or other lean-burn power source, compr...	08/15/2006
7060231	Plasma 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
7040313	Method and apparatus for nitric oxide generation Inhalation of low levels of nitric oxide can rapidly and safely decrease pulmonary hypertension in mammals. Precise delivery of nitric oxide at therapeutic levels of 20 to 100 ppm and inhibition of reaction of nitric oxide with oxygen to form toxic impurities such a...	05/09/2006
7025869	Nitric oxide delivery system Inhalation of low levels of nitric oxide can rapidly and safely decrease pulmonary hypertension in mammals. Precise delivery of nitric oxide at therapeutic levels of 20 to 100 ppm and inhibition of reaction of nitric oxide with oxygen to form toxic impurities such a...	04/11/2006
6957528	No reduction with diesel fuel reformed by nonthermal hyperplasma The reduction of NOx in diesel engine exhaust gas, typically at about 200° C. to 400° C., is accomplished using a dual bed NaY—CuY zeolite reduction catalyst. The effectiveness of the catalyst in reducing the nitrogen oxides is markedly increased by t...	10/25/2005
6955794	Slot 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
6818193	Segmented 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
H2102	Contamination control of gaseous emissions by corona-discharge generation of plasma Contaminants within the gaseous emission discharged from an incinerator are eliminated during passage in parallel through reactor chambers by chemical reaction induced during exposure to plasma generated within said chambers. The plasma is generated by corona-discha...	05/04/2004
6517794	Method for removing nitrogen oxides from an oxygen-containing flue gas stream A method for removing nitrogen oxides from a lean flue gas. The method is carried out by: a) treating the flue gas in an electrical gas discharge, b) passing the thus treated flue gas over a basic storage material to store the nitrogen oxides in the form of ni...	02/11/2003
6508991	Emission control device and method An emission control device and method are provided for treating exhaust to reduce pollutants contained therein. The device includes a first chamber through which the exhaust passes. First and second metal grids are disposed within the first chamber at a p...	01/21/2003
6321531	Method 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 a gas stream containing gas formed from the oxidation of fuel, such as, in the exhaust stream of a combustion engine. Radicals are produced using a corona discharge ...	11/27/2001
6238525	Process 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
6118040	Method and apparatus for purifying a gaseous mixture including molecules and/or cells of toxic or polluting substances The method includes a step of creating a flow of the mixture, a step of generating an electron discharge at a velocity such as to create a zone in which the mixture is ionised and a step of directing a series of electron beams so as to intercept the flow ...	09/12/2000
6029442	Method and apparatus for using free radicals to reduce pollutants in the exhaust gases from the combustion of 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...	02/29/2000
6027616	Extraction of contaminants from a gas A method of treating industrial gases to remove contaminants is disclosed. Ions are generated in stream of injectable gas. These ions are propelled through the contaminated gas as it flows through a collection unit. An electric field is applied to the con...	02/22/2000
5817283	Method for removing sulfur dioxide and nitrogen oxides from combustion gases A method of removing dioxide and nitrogen oxides from a gaseous stream where an alkaline earth compound is added, either in a wet scrubbing unit which substantially saturates the gaseous stream with water, or to a gaseous stream to which water has been ad...	10/06/1998
5733360	Corona discharge reactor and method of chemically activating constituents thereby A corona discharge reactor (10) and method for chemically activating various constituents of a gas stream by use of corona discharge is provided. The corona discharge reactor (10) includes within a conduit a discharge plate (30a,b) having a plurality of t...	03/31/1998
5711859	Process for plasma-chemical conversion of N₂ O into NO_x A process for the conversion of N2 O into NOx (x=1 or 2) thereof, comprising forming a jet of gas to be treated comprising N2 O and directing the jet into the interstitial space of at least two divergent electrodes placed ...	01/27/1998
5458748	Coronal-catalytic apparatus and method for NO_x reduction This invention presents an NOx environment effective reduction apparatus comprising a sulfur tolerant, high water vapor (about 3% to about 18%) tolerant, packing-free coronal-catalyst. In one embodiment the invention comprises an NOx...	10/17/1995
5433832	Exhaust treatment system and method A moving fluid containing pollutants including NOx compounds is subjected to a relatively low-power alternating-current dielectric discharge for a relatively long time duration. In this manner, pollutants are oxidized and dissociated while the temperature...	07/18/1995
5284556	Exhaust treatment system and method A moving fluid containing pollutants including NOx compounds is subjected to a relatively low-power alternating-current dielectric discharge for a relatively long time duration. In this manner, pollutants are oxidized and dissociated while the temperature...	02/08/1994
5240575	NO_x reduction by sulfur tolerant coronal-catalytic apparatus and method This invention presents an NOx environment effective reduction apparatus comprising a sulfur tolerant coronal-catalyst such as high dielectric coronal-catalysts like glass wool, ceramic-glass wool or zirconium glass wool and method of use. In o...	08/31/1993
5147516	NO_x reduction by sulfur tolerant coronal-catalytic apparatus and method This invention presents an NOx environment effective reduction apparatus comprising a sulfur tolerant coronal-catalyst such as high dielectric coronal-catalysts like glass wool, ceramic-glass wool or zirconium glass wool and method of use. In o...	09/15/1992
5110579	Transparent diamond films and method for making A method is provided for making substantially transparent polycrystalline diamond film having a thickness greater than 50 microns which can be used in glazing applications and as a heat sink in microelectric applications. A mixture of hydrogen and methane...	05/05/1992
5100630	Water powered magneto generator for the production of nitrogen and phosphorus fertilizer apparatus A system for producing nitrogen and phosphorus fertilizer using an electric arc discharge through air and phosphate rock in which the electric arc necessary for the process is generated by a magneto-electric generator powered by water pressure. The nitrog...	03/31/1992
4966666	Fluid energizing method and apparatus The energizer of the instant invention includes an electric discharge apparatus for creating an electric discharge and a focusing mechanism for focusing the electric discharge on a fluid to be energized. In a preferred embodiment of the invention, the foc...	10/30/1990
4915915	Water-powdered piezoelectric unit for producing nitrogen fertilizer A system for producing nitrogen fertilizer using an electric arc process is described in which the electric arc necessary for the process is generated by piezoelectric elements actuated by a hammer mechanism powered by water pressure such as from a garden...	04/10/1990
4883570	Apparatus and method for enhanced chemical processing in high pressure and atmospheric plasmas produced by high frequency electromagnetic waves An apparatus and method for creating high temperature plasmas for enhanced chemical processing of gaseous fluids, toxic chemicals, and the like, at a wide range of pressures, especially at atmospheric and high pressures includes an electro-magnetic resona...	11/28/1989
4877589	Nitrogen fixation by electric arc and catalyst The fixation of nitrogen by electric arc process is made more efficient by this system which combines a low frequency electric discharge and a catalyst in such a way that an electric arc is formed entirely within a catalyst bed when the reactant gases to ...	10/31/1989
4820643	Process for determining the activity of a palladium-tin catalyst The effectiveness of a palladium-tin catalyst for subsequent plating thereon is determined by employing cyclic voltammetry....	04/11/1989
4695358	Method of removing SO₂, NO_X and particles from gas mixtures using streamer corona A method for converting sulfur dioxide and/or nitrogen oxide gases to acid mist and or particle aerosols is disclosed in which the gases are passed through a streamer corona discharge zone having electrodes of a wire-cylinder or wire-plate geometry....	09/22/1987
4611109	Gas and process for plasma arc cutting There is proposed as a plasma-producing gas, a gas containing the elements nitrogen and oxygen chemically combined in a nitrogen oxide and in particular nitrous oxide. These plasma-producing gases or mixture of gases stored in a bottle, a frame, a contain...	09/09/1986
4559206	Arc reactor for fertilizer manufacture An improved arc reactor device is disclosed for producing nitrogen oxides by an electric discharge process wherein the improvement is the addition of an igniter electrode and circuit responsive to the discharge electrode voltage causing arcing of the igni...	12/17/1985
4505795	Plasma method and apparatus for the production of compounds from gas mixtures, particularly useful for the production of nitric oxides from atmospheric air A process and apparatus for the production of compounds from gas mixture by the plasma method, particularly useful for the production of nitric oxides from atmospheric air as a step in producing synthetic nitrogenous fertilizer. According to the novel met...	03/19/1985
4482525	Nitrogen fixation apparatus A method and apparatus for achieving nitrogen fixation includes a volumetric electric discharge chamber. The volumetric discharge chamber provides an even distribution of an electron beam, and enables the chamber to be maintained at a controlled energy to...	11/13/1984
4451436	Nitrogen fixation by plasma and catalyst A system and a method of nitrogen fixation is disclosed in which nitrogen and other gases such as oxygen are electrically activated and reacted on a catalyst-like material to provide a fixed nitrogen product in such a way that the reactant gases are first...	05/29/1984
4399012	Nitrogen fixation method and apparatus A method and apparatus for achieving nitrogen fixation includes a volumetric electric discharge chamber. The volumetric discharge chamber provides an even distribution of an electron beam, and enables the chamber to be maintained at a controlled energy to...	08/16/1983
4318708	Method of investigation or control of catalysts or catalyst reactions A method of investigation or control of catalysts or catalyst reactions wherein a gas or gas mixture is brought into contact with the catalyst (12). The properties of the catalyst and/or the progress of the reaction depending on the catalyst are determine...	03/09/1982
4297123	Method and apparatus for producing a nitrate fertilizer A portable, self-contained system for producing nitric acid from a supply of electricity and water, incorporates a nitrogen generating unit including a cabinet enclosing a manifold defining a plurality of series connected air combustion chambers each havi...	10/27/1981

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Class 204/179 - Nitrogen oxides