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Reductant patents



      
           
This page is updated frequently with new Reductant-related patent applications. Subscribe to the Reductant RSS feed to automatically get the update: related Reductant RSS feeds. RSS updates for this page: Reductant RSS RSS


Multi-stage scr system

Multi-stage scr system

Injector mounting configuration for an exhaust treatment system

Donaldson

Injector mounting configuration for an exhaust treatment system

Injector mounting configuration for an exhaust treatment system

Gm Global Technology Operations

Vehicle and a method of updating efficiency of a selective catalytic reduction filter of an exhaust treatment system of…

Date/App# patent app List of recent Reductant-related patents
02/26/15
20150052879
 Mixing plate as stabilizer for ammonia gas injector patent thumbnailMixing plate as stabilizer for ammonia gas injector
A system for mixing ammonia (reductant) with engine exhaust includes an exhaust flow created by a vehicle engine, an ammonia feed line passing into the exhaust flow, an injector connected to the feed line and positioned within the exhaust flow, the injector having at least one port for discharging ammonia into the exhaust flow, and a mixing plate positioned within the exhaust flow downstream of the ammonia injector and stabilizing at least one of either the feed line and the injector. An aspect of the invention is to stabilize the injector by attaching the mixing plate to the feed line to provide such stability.
International Engine Intellectual Property Company , Llc
02/26/15
20150052878
 Multi-stage scr system patent thumbnailMulti-stage scr system
A multi-stage scr system including a front reductant injecting device, a front mixer, a front scr catalyst, a back reductant injecting device, a back mixer, a back scr catalyst, and a dcu. The front and back reductant injecting devices receives reductant from an air-driven pump, which includes a liquid supply tank, a pressure tank, and solenoids control valves.
02/19/15
20150047329
 Injector mounting configuration for an exhaust treatment system patent thumbnailInjector mounting configuration for an exhaust treatment system
The present disclosure relates to a device for mounting an injector to an exhaust pipe. The device includes an injector mounting structure having an exterior surface configured for mounting the injector.
Donaldson Company, Inc.
02/19/15
20150047328
 Vehicle and a  updating efficiency of a selective catalytic reduction filter of an exhaust treatment system of the vehicle patent thumbnailVehicle and a updating efficiency of a selective catalytic reduction filter of an exhaust treatment system of the vehicle
A vehicle and a method of updating efficiency of a selective catalytic reduction filter (scrf) of an exhaust treatment system of the vehicle are disclosed. The method includes obtaining an initial calculated efficiency of the scrf, via a controller, regarding one of a nox conversion, a reductant absorption, a reductant desorption and a reductant oxidation.
Gm Global Technology Operations Llc
02/19/15
20150047326
 Water injection exhaust treatment system patent thumbnailWater injection exhaust treatment system
An exhaust aftertreatment system may include a reductant supply and diluent supply conduits, an injector and a control module. The reductant supply conduit includes a first valve controlling a flow of reductant through the reductant supply conduit.
Tenneco Automotive Operating Company Inc.
02/19/15
20150047321
 Pressurized tank vehicular fluid delivery system patent thumbnailPressurized tank vehicular fluid delivery system
Systems and methods for delivering a vehicular fluid to a component of the vehicle. A reductant delivery system of a selective catalytic reduction system delivers the vehicular fluid to the component of the vehicle.
Cummins Emission Solutions, Inc.
02/19/15
20150047319
 Vehicle and a  determining a reductant storage capacity set point of a selective catalytic reduction filter of an exhaust treatment system of the vehicle patent thumbnailVehicle and a determining a reductant storage capacity set point of a selective catalytic reduction filter of an exhaust treatment system of the vehicle
A vehicle and a method of determining a reductant storage capacity set point of a selective catalytic reduction filter (scrf) of an exhaust treatment system of a vehicle are disclosed. The method includes determining a storage estimate of a reductant inside the scrf and determining a particulate estimate in the scrf representative of an amount of particulate matter collected inside the scrf.
Gm Global Technology Operations Llc
02/12/15
20150040722
 Iron reduction process and equipment patent thumbnailIron reduction process and equipment
An iron production furnace equipment (1) has a melting reactor (2) into which iron oxide-containing raw material (4) and slag formers (5) are added. A melter arrangement (22) melts the iron oxide-containing raw material and transforms the melted raw material into liquid slag (6) a smelting reduction reactor (3) is connected to the melting reactor by a slag transfer arrangement (10).
Valeas Recycling Ab
02/05/15
20150033705
 Exhaust fluid dosing control system and method patent thumbnailExhaust fluid dosing control system and method
A dosing control system for an exhaust system of an engine includes: a tank containing a reductant solution having urea; an injector operable to inject the reductant solution into an exhaust flow upstream of an scr apparatus; first and second nox sensors disposed to sense nox emissions in the exhaust flow upstream and downstream, respectively, of the scr apparatus; and a control module. The control module is disposed in signal communication with the first and second nox sensors and in operable communication with the injector, the control module being operable to set an original dosing level and decrease a dosing of the reductant solution injected by the injector based on a determination from signals received from the first and second nox sensors that a reduction in a conversion efficiency of the scr apparatus below a defined level of conversion efficiency has occurred..
Gm Global Technology Operations Llc
02/05/15
20150033704
 Temperature gradient correction of ammonia storage model patent thumbnailTemperature gradient correction of ammonia storage model
An exhaust gas treatment system includes a scr device that stores a reductant that reacts with the nox emissions and a reductant supply system to inject the reductant according to a reductant load model. At least one temperature sensor or model generates a temperature signal indicating an scr temperature of the scr device.
Gm Global Technology Operations Llc
01/29/15
20150030702

Nitric oxide-generating skin dressings


A skin dressing is provided comprising a first component including a source of protons, a second component including a nitrite salt, the skin dressing further comprising a non-thiol reductant. The skin dressing is adapted, such that, when the first and second components are brought together and applied to a skin site the nitrite reacts to generate nitric oxide, increasing the ph of the dressing in contact with the skin site from an acidic value to a more neutral value..
Insense Limited
01/29/15
20150030546

Oral care product formulation


A two-part oral care system includes a first vessel containing an oxidative composition having a ph less than 7.5 and a second vessel containing a reductant composition having a ph greater than 7. The first and second vessels isolate the oxidative and reductant compositions from reacting with one another during storage and the vessels can dispense the oxidative and reductant compositions for combining to result in a final composition for use.
01/22/15
20150023843

Reductant supply system


An aftertreatment system is disclosed. The aftertreatment system includes an exhaust conduit and a selective catalytic reduction module.
Caterpillar Inc.
01/22/15
20150020529

Gas turbine emissions control system and method


Embodiments of the present disclosure are directed towards a system including a gas turbine engine configured to produce exhaust gas, a selective catalytic reduction system configured to produce processed exhaust gas from the exhaust gas, and a control system. The control system includes a first controller configured to regulate operation of the selective catalytic reduction system, a second controller configured to regulate operation of the gas turbine engine, and an optimizer configured to coordinate operation of the first controller and the second controller to simultaneously maximize a first level of an emissions compound in the exhaust gas and regulate injection of a reductant into the selective catalytic reduction system to reduce a second level of the emissions compound in the processed exhaust gas to a first desired level of the emissions compound in the processed exhaust gas..
General Electric Company
01/15/15
20150017465

Silver powder and producing same


The present invention provides a method for producing a silver powder, the method being capable of producing a silver powder with high productivity and at low cost, the silver powder having an average particle diameter of 0.3 to 2.0 μm and a narrow particle size distribution, and provides a silver powder produced by the production method. According to the present invention, the method for producing a silver powder includes: quantitatively and continuously supplying each of a silver solution containing a silver complex and a reductant solution to a flow path; and quantitatively and continuously reducing a silver complex in a reaction solution obtained by mixing the silver solution with the reductant solution in the flow path, wherein the reaction solution is made to contain a dispersant, and also a silver concentration in the reaction solution is adjusted to be in a range of 5 to 75 g/l..
Sumitomo Metal Mining Co., Ltd.
01/08/15
20150011377

Catalyzed scr filter and emission treatment system


Provided is a catalyst article for simultaneously remediating the nitrogen oxides (nox), particulate matter, and gaseous hydrocarbons present in diesel engine exhaust streams. The catalyst article has a soot filter coated with a material effective in the selective catalytic reduction (scr) of nox by a reductant, e.g., ammonia..
Basf Corporation
01/08/15
20150010451

Catalytic reduction of nox


A system for nox reduction in combustion gases, especially from diesel engines, incorporates an oxidation catalyst to convert at least a portion of no to no2, particulate filter, a source of reductant such as nh3 and an scr catalyst and methods for operating such a system are disclosed. Considerable improvements in nox conversion and soot reduction are observed even at relatively low operating temperatures..
Johnson Matthey Public Ltd. Co.
01/01/15
20150004083

Injector boss and system and injecting liquid into a gas stream


An injector boss (114) for mounting an injector (110) that injects liquid reductant (u) into a flow of exhaust gas (eg) in an exhaust pipe (116) includes at least one sidewall (124) and a boss foundation (126). The boss foundation (126) is generally perpendicular to the at least one sidewall (124), and the at least one sidewall and the boss (114) define an internal area (120).
International Engine Intellectual Property Company, Llc
01/01/15
20150004068

Catalytic reduction of nox


A system for nox reduction in combustion gases, especially from diesel engines, incorporates an oxidation catalyst to convert at least a portion of no to no2, particulate filter, a source of reductant such as nh3 and an scr catalyst and methods for operating such a system are disclosed. Considerable improvements in nox conversion and soot reduction are observed even at relatively low operating temperatures..
Johnson Matthey Public Ltd. Co.
12/25/14
20140373508

Reductant delivery unit for automotive selective catalytic reduction with thermally optimized peak-and-hold actuation based on an injector open event


A trigger circuit is provided for a peak and hold driver circuit for a reductant delivery unit (rdu) having a solenoid-operated injector for selective catalytic reduction (scr) after-treatment for vehicles. The peak and hold driver circuit is constructed and arranged to actuate the injector in a rise-to-peak current phase followed by a low current hold phase.
Continental Automotive Systems, Inc.
12/18/14
20140369899

Multi-compartment phae separation tank for multiple reductant injectors


A cooling system in an aftertreatment unit for a multi-cylinder internal combustion engine is disclosed. The aftertreatment unit includes a selective catalyst reduction (scr) module, an exhaust conduit portion, and a number of reductant injectors.
Caterpillar Inc.
12/18/14
20140369898

Cross style (4 port) ammonia gas injector


An ammonia (reductant) injector for delivering a ammonia into an engine exhaust stream is disclosed. Generally speaking, the injector has a body with an inlet fluidly coupled to a plurality of channels within the body, a plurality of discharge ports, each port being fluidly coupled to at least one channel, and an ammonia feed line connected to the inlet of the body.
International Engine Intellectual Property Company, Llc
12/18/14
20140366870

Methods for recovering and recycling salt byproducts in biorefinery processes


In some variations, the invention provides a process for fractionating biomass, comprising: in a digestor, fractionating a biomass feedstock in the presence of a solvent for lignin, sulfur dioxide, and water, to produce a liquor containing hemicellulose, cellulose-rich solids, and lignin; substantially removing the cellulose-rich solids from the liquor; hydrolyzing the hemicellulose contained in the liquor, to produce hemicellulosic monomers; hydrolyzing the cellulose-rich solids to produce glucose; neutralizing, with lime, a hydrolysate liquid containing the hemicellulosic monomers and the glucose, thereby generating gypsum; heating the gypsum to form calcium sulfate; reducing the calcium sulfate with a reductant (such as syngas) to generate calcium oxide and sulfur dioxide; and recycling the calcium oxide and the sulfur dioxide. In other variations, magnesium oxide is the base from neutralizing the hydrolysate, and the resulting magnesium sulfate is converted back to magnesium oxide and sulfur dioxide through combustion..
Api Intellectual Property Holdings, Llc
12/18/14
20140366514

Premixer conduit for exhaust aftertreatment system


An exhaust aftertreatment system is disclosed. The exhaust aftertreatment system includes a premixer conduit that defines an exhaust flow path, a baffle disposed in the exhaust flow path, and a reductant injector in fluid communication with the exhaust flow path.
Caterpillar Inc.
12/11/14
20140363676

Phosphorus-doped nickel nanoparticle and manufacturing the same


The present invention provides a method of manufacturing a phosphorus-doped nickel nanoparticle. The method includes the steps of: mixing a nickel solution including a nickel compound and a solvent, a seed particle, and a phosphorus-containing reductant in an arbitrary order to prepare a mixed solution; and adjusting ph of the mixed solution such that the mixed solution becomes acidic.
12/11/14
20140363525

Method and generating nitric oxide for medical use


A method and system for generating and delivering nitric oxide directly to a patient. A reaction chamber is provided that is located at or in close proximity to the patient and reactants within the reaction chamber react together to produce a predetermined amount of nitric oxide.
12/11/14
20140363358

Exhaust aftertreatment operating the system


An exhaust system includes a first scr catalyst and a second scr catalyst positioned downstream of the first scr catalyst. A first injector is provided upstream of the first scr catalyst, and a second injector is provided upstream of the second scr catalyst.
12/11/14
20140363357

Systems and techniques for nozzle cooling of diesel exhaust fluid injection systems


A system is provided for delivery of diesel exhaust fluid or other reductant to an injector for release into an engine exhaust aftertreatment system. The injector includes a nozzle assembly that thermally shields the diesel exhaust fluid from the exhaust gas temperatures.
12/11/14
20140360166

Systems and methods for nox sensor diagnostics


Systems and methods are disclosed for diagnosing gain rationality of an nox sensor that is downstream of a selective catalytic reduction (scr) catalyst. Sensor diagnostics are performed while maintaining reductant dosing to the scr catalyst..
12/04/14
20140352280

Air driven reductant dosing system


A dosing system for delivering reductant into an exhaust gas treatment system of an internal combustion engine using an air driven hydraulic pump, which includes a pressure pump tank and a liquid supply tank, for closed-loop controlling reductant pressure, and a three-stage pwm control method for dosing rate control. Reductant residue in the dosing system is purged by using compressed air, and when the air driven hydraulic pumps is positioned inside a reductant tank, heating means in the reductant tank can also be used for heating the air driven hydraulic pump.
12/04/14
20140352279

Exhaust gas treatment system with emission control during filter regeneration


An exhaust gas treatment system for an engine includes an exhaust gas inlet tube configured to receive an exhaust gas from the engine. A particulate filter, a heat exchange system and first and second selective catalytic reduction (scr) devices are in fluid communication with the exhaust gas inlet tube.
11/27/14
20140349841

Catalyzed scr filter and emission treatment system


Provided is a catalyst article for simultaneously remediating the nitrogen oxides (nox), particulate matter, and gaseous hydrocarbons present in diesel engine exhaust streams. The catalyst article has a soot filter coated with a material effective in the selective catalytic reduction (scr) of nox by a reductant, e.g., ammonia..
11/27/14
20140349840

Ammonia oxidation catalyst in scr system


Disclosed herein is an ammonia oxidation catalyst for converting nitrogen oxides generated from a mobile source or fixed source into harmless nitrogen using ammonia as a reductant and preventing the formation of nitrogen oxides due to the oxidation of ammonia. The ammonia oxidation catalyst includes selective catalytic reductive zeolite sequentially impregnated with platinum and copper..
11/27/14
20140348732

Operating method in hydrometallurgy of nickel oxide ore


It is an object to provide a method for producing magnesium oxide by which magnesium oxide being high in purity and low in impurity content can be produced simply and efficiently from a sulfuric acid solution containing magnesium and calcium such as waste water. In the present invention, calcium is precipitated as calcium sulfate and separated by concentrating a sulfuric acid solution containing magnesium and calcium, and magnesium is precipitated as magnesium sulfate and separated by further concentrating the solution resulting from the separation of calcium.
11/27/14
20140345257

Mixing system


A mixing system is provided. The mixing system includes a housing defining a boundary of a mixing conduit including an expansion section with an injector mount and a reductant diverter extending into the conduit upstream of the injector mount in the expansion section.
11/13/14
20140334983

Reductant sensor system


An exhaust treatment fluid system includes a tank housing for storing an exhaust treatment fluid. A suction tube includes a first end positioned within the housing and a second end in communication with a suction port of the housing.
11/13/14
20140331655

Mounting assembly for a reductant injector


A mounting assembly for an injector is located in a curved portion of an exhaust line having an exhaust flow from an upstream end to a downstream end. The mounting assembly includes an indent extending at least partially into the exhaust line curved portion and disposed in the exhaust flow.
11/06/14
20140329149

Method for preparing electrode materials and electrode materials produced therefrom


The present invention provides a method for preparing an electrode material, comprising providing an acidic plating bath; adding titanium dioxide in the form of powder, metal salt, and reductant to said acidic plating bath to obtain a precursor; and heat treating said precursor to obtain an electrode material. When the electrode material obtained by said method is applied to batteries, the batteries have not only high capacity, but also long lifetime..
11/06/14
20140328936

Novel pharmaceutical statin composition


The invention relates to a pharmaceutical composition, comprising or consisting of: 10 to 30 weight percent of at least a pharmaceutically active amount of a pharmaceutical substance selected from the group comprising statins, in particular water-insoluble, oxidatively degradable statins, preferably cerivastatin, fluvastatin, lovastatin, pitavastatin, pravastatin, rosuvastatin, simvastatin, or combinations thereof, 30 to 70 weight percent of lactose hydrate, 2 to 15 weight percent of microcrystalline cellulose, 5 to 25 weight percent of a partially water-soluble starch, 0.2 to 4 weight percent of at least one alkali and/or alkaline-earth salt of stearic acid and/or stearyl fumaric acid, wherein the composition contains no antioxidatively active substances such as chain terminators, reductants, free-radical scavengers, and complexing agents. The invention further relates to a method for the production thereof, to a composition that can be obtained in the method, and to the use of the pharmaceutical composition according to the invention..
11/06/14
20140326325

System and filling reductant tank


A method for filling a reductant tank is disclosed. The method includes creating a lower air pressure within the reductant tank than a pressure of an external reductant reservoir using the first valve, the second valve, and the venturi.
11/06/14
20140325966

Injector control for a selective catalytic reduction system


Systems and methods are provided for controlling the amount and timing of nitrogen oxide reductant injected during a given injection cycle into an exhaust system of a vehicle as part of a selective catalytic reduction system. The amount of reductant injected is determined by at least one computational model that accounts for the growth of liquid and/or solid reductant film growth on the interior of the exhaust system.
11/06/14
20140325965

Diesel exhaust fluid control system


An engine has an exhaust gas system and a reductant delivery system. The reductant delivery system includes a pump which pumps reductant from a tank an injector which injects reductant into the exhaust gas, and a heater for heating the reductant in the tank.
11/06/14
20140325964

Ammonia gas pressure booster


A system and method for delivering a reductant into an engine exhaust stream for use in the reduction of nox is disclosed. The system includes a cartridge having an interior space for storing the reductant containing material, a fluid supply line fluidly connected to the cartridge for receiving the reductant, a pressure boosting device for boosting the flow of reductant, a flow management device, and, an injector for injecting the reductant into an after-treatment system for combining with the exhaust stream.
11/06/14
20140325962

Diesel engine exhaust gas purification method and exhaust gas purification system


An exhaust gas purification method of a diesel engine, which purifies exhaust gas while suppressing deterioration in drivability and fuel consumption, including when exhaust gas enters a rich reduction state, opening an egr valve and closing an intake throttle, if a temperature of an nox occlusion reduction catalyst is at or above a predetermined temperature, and a vehicle having a diesel engine is decelerating from a speed at or above a predetermined speed, and then closing an exhaust throttle provided downstream of the nox occlusion reduction catalyst and supplying fuel to the nox occlusion reduction catalyst as a reductant.. .
10/30/14
20140318102

Exhaust aftertreatment system where an activator material is added to the reductant fed to the catalytic converter


An exhaust gas after treatment system includes a catalytic converter arrangement with at least one catalytic material, wherein the catalytic converter arrangement is arranged in an exhaust gas path downstream of a combustion engine, and further includes one or more dosing interfaces for feeding at least one reducing agent for reducing an nox content in the exhaust gas. The one or more dosing interfaces are arranged to feed at least one activator material to the exhaust gas.
10/30/14
20140317918

Composition and methods of forming solder bump and flip chip using the same


Provided are a composition for an anisotropic conductive adhesive, a method of forming a solder bump and a method of forming a flip chip using the same. The composition for an anisotropic conductive adhesive includes a low melting point solder particle and a thermo-curable polymer resin.
10/30/14
20140317915

Composition and methods of forming solder bump and flip chip using the same


Provided are a composition for an anisotropic conductive adhesive, a method of forming a solder bump and a method of forming a flip chip using the same. The composition for an anisotropic conductive adhesive includes a low melting point solder particle and a thermo-curable polymer resin.
10/23/14
20140314645

Scr catalyst ammonia surface coverage estimation and control


Described herein are various embodiments of an apparatus, a system, and a methods for reducing nox emissions using ammonia storage on an scr catalyst. For example, according to one embodiment, an apparatus for controlling an scr system of an internal combustion engine system includes an ammonia storage module and a reductant dosing module.
10/23/14
20140314644

Reductant delivery unit for automotive selective catalytic reduction with reducing agent heating


A reductant delivery unit for selective catalytic reduction (scr) after-treatment for vehicles includes a solenoid operated fluid injector associated with an exhaust gas flow path upstream of a scr catalytic converter. The fluid injector has a fluid inlet and a fluid outlet.
10/23/14
20140311837

Safety brake system for trailers


In a gaseous-fuelled stoichiometric compression ignition internal combustion engine, a pilot fuel is injected directly into the combustion chamber to help initiate a multi-point ignition. The engine provides performance improvements approaching those of high pressure direct injection engines but with less complexity because the gaseous fuel is introduced into the intake air subsystem at relatively low pressure and as a result of the stoichiometric combustion, the low oxygen content in the combustion products exiting the combustion chamber allows the use of a three-way catalyst instead of other after treatment arrangements normally associated with conventional compression ignition engines that require the addition of a reductant..
10/23/14
20140311137

Tri-flow exhaust treatment device with reductant mixing tube


An exhaust treatment device includes first and second substrates positioned in parallel within a housing. A baffle plate supports the substrates, an inlet tube and an outlet pipe, and defines a portion of a first chamber.
10/23/14
20140311126

Air-injection system to improve effectiveness of selective catalytic reduction catalyst


Embodiments are described to improve the durability of a lean nox aftertreatment system. According to one embodiment of the present invention an air injection system is used to inject air continuously into the exhaust system between the upstream three-way catalyst and the downstream selective catalytic reduction (scr) catalyst when the engine is operating at stoichiometric or rich air/fuel ratios and the exhaust temperatures are above a calibratable level (e.g., 700° c.).
10/16/14
20140305346

Alkaline earth oxides for green processes for metals and other material


The present invention teaches the method to use the sulfate or sulfites based raw materials, such as magnesium, calcium and other alkative earth sulfates or sulfites to produce the respective oxides in a carbon five basis, by using sulfur as the fuel and the reductant. The invention also utilizes renewable energy such as solar thermal or green electricity wherever possible.
10/09/14
20140301923

Selective catalytic reduction catalyst system


Described are scr catalyst systems comprising a first scr catalyst composition and a second scr catalyst composition arranged in the system, the first scr catalyst composition promoting higher n2 formation and lower n2o formation than the second scr catalyst composition, and the second scr catalyst composition having a different composition than the first scr catalyst composition, the second scr catalyst composition promoting lower n2 formation and higher n2o formation than the first scr catalyst composition. The scr catalyst systems are useful in methods and systems to catalyze the reduction of nitrogen oxides in the presence of a reductant..
10/02/14
20140294963

Novel gold-platinum based bi-metallic nanocrystal suspensions, electrochemical manufacturing processes therefor and uses for the same


The present invention relates to novel gold-platinum based bi-metallic nanocrystal suspensions that have nanocrystal surfaces that are substantially free from organic or other impurities or films associated with typical chemical reductants/stabilizers and/or raw materials used in nanoparticle formation processes. Specifically, the surfaces are “clean” relative to the surfaces of metal-based nanoparticles made using chemical reduction (and other) processes that require organic (or other) reductants and/or surfactants to grow (and/or suspend) metal nanoparticles from metal ions in a solution.
10/02/14
20140290214

Fluid connectors for reductant systems


A reductant system for an aftertreatment system of an internal combustion engine is disclosed. The reductant system includes at least one reductant feed line and a reductant system component such as a dosing module.
09/25/14
20140286839

Process for the selective removal of molybdenum from a solution containing it


The present invention relates to a process for selectively removing molybdenum from a solution which contains molybdenum, said process comprising the following steps: bringing the solution to an acid ph lower than or equal to 3, preferably lower than or equal to 2, even more preferably lower than or equal to 0.5, by the addition of an inorganic acid; adding at least one organic solvent, preferably toluene or xylene, to the solution and stirring continuously so as to create a water-organic emulsion; adding to the water-organic emulsion at least one alkaline metal xanthate having the general formula merx, wherein r is a linear or branched alkyl group having a number of carbon atoms higher than or equal to 2, me is an alkaline metal selected from li, na, k, rb, cs and fr, and x is the xanthate group, so as to form a complex with molybdenum wherein the molar ratio molybdenum/alkaline metal xanthate ranges from 1/6 to 1/2, keeping the emulsion at an acid ph by the addition of an inorganic acid, and interrupting the stirring so as to allow the separation of the aqueous phase from the organic phase. The linear or branched alkyl group r preferably has a number of carbon atoms higher than or equal to 2 and lower than or equal to 12.
09/25/14
20140286832

Exhaust system


An exhaust system is provided. The exhaust system includes an exhaust conduit having a protuberance thereon.
09/25/14
20140283933

Scr system comprising a reductant distributor


An scr system comprising a reductant tank, a return passageway, and a reductant distributor. The return passageway is coupled fluidly to the reductant tank via an outlet of the return passageway.
09/18/14
20140275388

Redox polymers for improved dirt and water resistance for elastomeric wall and roof coatings


The present invention provides elastomeric roof coatings and aqueous coating compositions of (i) an acrylic emulsion copolymer that comprises (ii) a reductant and has a high molecular weight, (iii) a combination of a hydrophilic polymeric dispersant and a pigment, extender or filler, and (iv) a multivalent transition metal ion or multivalent transition metal ion compound or salt. The composition and coating provide excellent swelling resistance and a balance of tensile and elongation in an acrylic roof coating composition..
09/18/14
20140274665

Selective catalytic reduction catalyst system


Described are scr catalyst systems comprising a first scr catalyst composition and a second scr catalyst composition arranged in the system, the first scr catalyst composition having a faster denox response time when exposed to ammonia than the second catalyst composition and the second scr catalyst composition has a higher steady state denox performance than the first catalyst composition. The scr catalyst systems are useful in methods and systems to catalyze the reduction of nitrogen oxides in the presence of a reductant..
09/18/14
20140271452

Stabilized metal-exchanged sapo material


Described are catalyst materials and catalytic articles comprising a metal exchanged sapo material comprising a plurality of substitutional sites consisting essentially of si(4al) sites and substantially free of si(0al) sites. The materials and catalytic articles are useful in methods and systems to catalyze the reduction of nitrogen oxides in the presence of a reductant..
09/18/14
20140271423

Catalytic reduction of nox


A system for nox reduction in combustion gases, especially from diesel engines, incorporates an oxidation catalyst to convert at least a portion of no to no2, particulate filter, a source of reductant such as nh3 and an scr catalyst. Considerable improvements in nox conversion are observed..
09/18/14
20140271422

Selective catalytic reduction catalyst system


Described are scr catalyst systems comprising a first scr catalyst composition and a second scr catalyst composition arranged in the system, the first scr catalyst composition promoting higher n2 formation and lower n2o formation than the second scr catalyst composition, and the second scr catalyst composition having a different composition than the first scr catalyst composition, the second scr catalyst composition promoting lower n2 formation and higher n2o formation than the first scr catalyst composition. The scr catalyst systems are useful in methods and systems to catalyze the reduction of nitrogen oxides in the presence of a reductant..
09/18/14
20140271385

Catalytic reduction of nox


A system for nox, reduction in combustion gases, especially from diesel engines, incorporates an oxidation catalyst to convert at least a portion of no to no2, particulate filter, a source of reductant such as nh3 and an scr catalyst. Considerable improvements in nox conversion are observed..
09/18/14
20140262955

Process, method, and system for removing heavy metals from fluids


Trace element levels of mercury in crude oil are reduced by first passing the crude oil through a filtration device to generate filtered crude having a reduced concentration of mercury and a reject stream having a concentrated mercury level. In one embodiment, the filtration device is back-flushed to generate the reject stream.
09/18/14
20140260216

Apparatus, method, and system for diagnosing reductant delivery performance


An exhaust gas treatment system for an internal combustion engine may have a reductant delivery system with a controller that performs period diagnostics to determine whether there is a blockage in the reductant delivery system. The diagnostic procedure may include sampling first and second pressures at first and second operating conditions, respectively, and then comparing the first pressure differential between the first and second pressures with one or more threshold pressure differentials to determine whether system components such as a dosing line and an injector are at least partially blocked.
09/18/14
20140260206

Apparatus, method, and system for reductant filtration


An exhaust gas treatment system for an internal combustion engine may have a reductant delivery system with a reductant tank. A filter module positioned in the reductant tank filters reductant before it is conveyed to the reductant pump to remove impurities.
09/18/14
20140260202

Reductant material deposit reduction in exhaust aftertreatment systems


In one non-limiting embodiment, an apparatus for treating exhaust includes a reductant injector, an aftertreatment component including a nox reduction catalyst, and a pathway for directing exhaust to the aftertreatment component. The pathway includes a constriction zone within which is positioned a mixing member.
09/18/14
20140260200

Catalytic reduction of nox


A system for nox reduction in combustion gases, especially from diesel engines, incorporates an oxidation catalyst to convert at least a portion of no to no2, particulate filter, a source of reductant such as nh3 and an scr catalyst. Considerable improvements in nox conversion are observed..


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Reductant topics: Internal Combustion Engine, Exhaust Gas, Scr Catalyst, Combustion, Selective Catalytic Reduction, Catalytic Reduction, Downstream, Nox Reduction, Nanoparticle, Hydrogen Sulfide, Regenerate, Hydrocarbon, Nitrogen Dioxide, Diesel Oxidation Catalyst, Conversion Efficiency

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