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6913737 |
Method for the treating in exhaust gas and exhaust gas treating system
The present invention provides a method for the treatment of mercury present in exhaust gas wherein, after a chlorinating agent is added to exhaust gas containing nitrogen oxides, sulfur oxides and...
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6901748 |
Heater system for diesel engines having a selective catalytic reduction system
A diesel engine ( 10 ) having a selective catalytic reduction system with a urea tank ( 12 ). A heater element ( 26 ) is mounted in the urea tank and another heating element ( 34 ) is mounted in...
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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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6890500 |
Salt-templated microporous solids
The invention is directed to open-framework and microporous solids well suited for use in catalysis and ion exchange. The microporous solids are constructed by using a salt template which can be...
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6890499 |
Catalyst for decomposing N2O, its use and method for the production thereof
Catalyst for decomposing N 2 O, its use, and process for its production A process is described for the decomposition of N 2 O during nitric acid production by bringing the N 2 O-containg waste gas...
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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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6878359 |
Process and device for the selective catalytic reduction of nitrogen oxides in an oxygen-containing gaseous medium
The process and the device are provided for the selective catalytic reduction of nitrogen oxides in an oxygen-containing gaseous medium. The reducing agent required for the reaction is prepared in...
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6875409 |
Catalyst and process for oxidation and removal of nitrogen oxides (NOx) from combustion gases
A bi-functional oxidation catalyst and process for catalytic oxidation and removal of nitrogen oxides (NO x ) from combustion gases derived from combustion of carbonaceous fuels such as coal, oil,...
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6872371 |
Method and apparatus for NOx and SO2 removal
NO is removed from a gas stream by reacting NO with an absorbent to form a metal nitrosyl complex. The metal nitrosyl complex is reacted with sulfite and/or bisulfite to produce recoverable...
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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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6863875 |
Flue gas treating system and process
In a flue gas treating system, an absorption tower ( 21 ), a reheating section ( 22 ) and a fan ( 23 ) are arranged in line on a vertical axis so as to function as at least a part of a stack for...
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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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6855303 |
Method for selective catalytic reduction of nitrogen oxides
A method for catalytically reducing nitrogen oxide compounds (NO x , defined as nitric oxide, NO, +nitrogen dioxide, NO 2 ) in a gas by a material comprising a base metal consisting essentially of...
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6848374 |
Control of mercury emissions from solid fuel combustion
A system 26 for removing elemental mercury or mercury compounds handles carbonaceous sorbent 28 of a starter batch stored in a silo 30 in an agglomerated state. The sorbent 28 is fed by a...
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6846471 |
Catalyst for decomposing nitrous oxide, process for producing the same and method for decomposing nitrous oxide
The invention relates to a catalyst for decomposing nitrous oxide, which is [1] a catalyst comprising a support having supported thereon aluminum, magnesium and rhodium, [2] a catalyst comprising...
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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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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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6805849 |
System for NOx reduction in exhaust gases
Selective catalytic reduction of NO x in combustion gases, especially from diesel engines, utilizes a system incorporating an oxidation catalyst to convert at least a portion of NO to NO 2 , a...
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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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6793903 |
High temperature decomposition of hydrogen peroxide
Nitric oxide (NO) is oxidized into nitrogen dioxide (NO 2 ) by the high temperature decomposition of a hydrogen peroxide solution to produce the oxidative free radicals, hydroxyl and hydroperoxyl....
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6787023 |
Metal-containing macrostructures of porous inorganic oxide, preparation thereof, and use
There is provided a catalyst containing porous macrostructures comprised of: (a) a three-dimensional network of particles of porous inorganic material (e.g., zeolites); and, (b) at least one metal...
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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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6761863 |
Process for the removal of impurities from gas streams
The present invention relates to a process for removing nitrogen oxides, sulfur oxides, mercury and mercuric oxide from gas streams such as furnace or utility boiler flue gas streams, particularly...
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6759564 |
Hydrate-based decontamination of toxic gases
Areas in which toxic material has been released, particularly in gaseous form but also in liquid form, are decontaminated by forming gas hydrate of the toxic agent. Smaller-molecule toxic agents...
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6759021 |
Method and device for introducing a gaseous reducing agent of a nitrogen oxide into a gas mixture
A method for introducing at least one gaseous reducing agent for a nitrogen oxide into a gas mixture, and a device for carrying out the method. Thermal energy is supplied to a body made from a...
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6743404 |
Method for the catalytic decomposition of N2O
A reactor for the catalytic oxidation of ammonia to form nitrogen oxides which has a noble metal gauze catalyst and a heat exchanger in that order in the direction of flow, a catalyst for the...
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6743749 |
Photocatalyst
A Ti—O—N film is formed on an SiO 2 substrate by sputtering. For example, TiO 2 is used as a target and nitrogen gas is introduced into the atmosphere. Crystallization is carried out by a...
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6743271 |
Air filter for gasoline and diesel engines
An air filter for gasoline and diesel engines that drastically improves the burning efficiency of gasoline and diesel engines is provided. The air filter includes a, replaceable filtering member...
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6737033 |
Method and device for the catalytic removal of a pollutant contained in an exhaust gas of a combustion system
The method and the device are configured for the catalytic removal of a pollutant contained in an exhaust gas of a combustion system using a reagent. A temporal mean, or time average, is formed for...
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6737032 |
Method of introducing a reaction medium into a first reaction medium flowing in a flow channel and for intensive mixing of the reaction media
A second reaction medium is introduced into a first reaction medium flowing in a flow channel and the reaction media are intensively mixed. The second reaction medium (which may be one or more...
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6735541 |
Process unit monitoring program
The present invention is a method to monitor and analyze the performance of a hydrocarbon-processing unit such as pipestill or hydrocracker unit. The invention includes the steps of collecting...
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6730280 |
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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6727202 |
Enhanced NOx trap having increased durability
A catalytic trap disposed in an exhaust passage of an internal combustion engine which is operated with periodic alternations between lean and stoichiometric or rich conditions, for abatement of NO...
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6723295 |
High-temperature stabile catalysts for decomposing N2O
A copper-containing catalyst of the composition of N 2 O contains a compound of the formula M x Al 2 O 4 , where M is Cu or a mixture of Cu and Zn and/or Mg and x is from 0.8 to 1.5. The novel...
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6722295 |
Method for the combined reduction of nitrogen oxide and sulfur dioxide concentrations in the furnace region of boilers
A method for the combined reduction of sulfur dioxide, SO 2 , and nitrogen oxides, NO x , in the gas stream of a furnace from the combustion of fossil fuels is disclosed. In a narrow gas...
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6713031 |
Structured catalysts for selective reduction of nitrogen oxides by ammonia using a compound that can be hydrolyzed to ammonia
A structured catalyst for selective reduction of nitrogen oxides with ammonia using an ammonia-supplying compound. The catalyst is preferably used for exhaust gas treatment of diesel vehicles...
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6713030 |
Process and apparatus for reducing the nitrogen oxide content in exhaust gases by the controlled addition of NH3
In the reduction of quantities of No x in the exhaust gases of lean bum engines such as diesel engines, using a selective reduction catalyst and a source of ammonia, the present invention improves...
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6709643 |
Catalyst and method of use in the reduction of nitrogen oxides using lower hydrocarbons
The present invention includes a supported catalyst for the reduction of nitrogen oxides (NO x ) with a lower hydrocarbon. The supported catalyst comprising at least one active metal and at least...
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6706246 |
System and method for the selective catalytic reduction of nitrogen oxide in a gas stream
A system and method for the selective catalytic reduction of nitrogen oxide in a furnace exhaust includes cooling the furnace exhaust in a first heat recovery section to a temperature between 400°...
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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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6692712 |
Exhaust gas catalyst comprising rhodium, zirconia and rare earth oxide
A catalyst comprising rhodium on a support, the support comprising 52-95% zirconia and 5-48% rare earth oxide, based on the total weight of (a) and (b), the concentration of the rhodium on the...
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6685897 |
Highly-basic large-pore zeolite catalysts for NOx reduction at low temperatures
A high-surface-area (greater than 600 m2/g), large-pore (pore size diameter greater than 6.5 angstroms), basic zeolite having a structure such as an alkali metal cation-exchanged Y-zeolite is...
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6682710 |
Catalytic reduction of nitrous oxide content in gases
A process and catalyst for reducing the nitrous oxide content in gas, which operates at relatively low temperatures, the activity of which is relatively insensitive to the presence of water vapour...
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6682709 |
Method for reducing NOx from exhaust gases produced by industrial processes
Gas-phase methods and systems for reducing NOx emissions and other contaminants in exhaust gases, and industrial processes using the same, are disclosed. In accordance with the present invention,...
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6680037 |
Device and method for removing sooty particulate from exhaust gases from combustion processes
A canister ( 1 ) contains a catalyst for generating NO 2 and a filter ( 8 ) for trapping PM, e.g. from diesel engines. The filter is thermally isolated from the canister, and preferably is...
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6667017 |
Process for removing environmentally harmful compounds
A process for oxidizing environmentally harmful compounds which participate in atmospheric photochemical reactions to produce for example ozone and undesirable smog constituents from a fluid, in...
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6656439 |
Pillared trioctahedral micas and/or vermiculites
Pillared trioctahedral micas and/or vermiculites are prepared. The process includes a conditioning operation for the partial reduction of the layer charge through an accelerated weathering process,...
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