Reductant

Reductant-related patent applications - as published by the U.S. Patent and Trademark Office (USPTO).

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NEW System and method for forming spherical silica-based proppant and pig iron utilizing mining slag
May 25, 2017 - N°20170145527

Pig iron and spherical silica-based proppant are extracted and produced through the use of formers, fluxes, reductants, and stabilizers, at predetermined specified weight ratios. The base material utilized in this process is slag, typically derived from the mining industry. The slag is delivered and utilized in a manner that allows the adding and mixing of the various materials such as, ...
NEW Silver particle synthesizing method, silver particles, conductive paste producing method, and conductive paste
May 25, 2017 - N°20170144220

A silver particle synthesizing method includes reducing a dispersant from first silver particles each covered with the dispersant to obtain second silver particles. The method further includes synthesizing third silver particles each having a larger particle diameter than the second silver particles by causing a reaction between a silver compound and a reductant in a liquid phase containing the second ...
Methods to adapt reductant injection controls for catalyst aging
General Electric Company
May 18, 2017 - N°20170138244

A system includes an exhaust treatment system configured to treat emissions from a combustion engine via a catalyst. The system includes a controller configured to obtain an operating parameter indicating catalyst performance. The controller is configured to determine a deterioration factor indicating deterioration of the catalyst based at least in part on the operating parameter. The controller is configured to ...
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Electrochemical reductant generation while dosing def
Paccar Inc
May 11, 2017 - N°20170128884

A diesel exhaust fluid (def) doser includes a def inlet configured to receive def, a def outlet configured to spray def out of the def doser, and an electrochemical cell. The electrochemical cell is located between the def inlet and the def outlet and couplable to a power source. The electrochemical cell is configured such that, when def is flowing ...
Filter system and filtration method for fluid reservoirs
Caterpillar Inc.
May 04, 2017 - N°20170122170

A fluid reservoir for accommodating a fluid reductant used in an scr exhaust treatment process may include various styles or designs of bag filters to filter debris and contaminants from the reductant prior to being channeled out of the reservoir. To secure the bag filter to a header assembly accommodating the various inlet and outlet tubes, in one aspect, the ...
Exhaust aftertreatment system with ammonia gas generator
Tenneco Automotive Operating Company Inc.
May 04, 2017 - N°20170122169

An exhaust aftertreatment system may include a reductant tank, a reactor system, a storage tank, a first conduit and a second conduit. The reactor system may receive reductant from the reductant tank and may output a gas comprising ammonia. The storage tank may receive gas comprising ammonia from the reactor system and may store a volume of gas comprising ammonia. ...
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Method for producing polymer film with high concentration of silver nanoparticles
Institute Of Chemistry Of New Materials Of National Academy Of Sciences Of Belarus
May 04, 2017 - N°20170121471

A method for producing a polymer film of polyvinyl alcohol (pva) having a high concentration of silver nanoparticles (nps) includes forming the nps by drying the forming composition by the process of slow reduction of ag ions by soft organic reductants. Changing a filling degree of ag nps in the film is achieved by displacement of ag nps and their ...
Systems and methods to reduce reductant consumption in exhaust aftertreatment systems
Cummins Inc.
April 27, 2017 - N°20170114690

Systems, apparatus and methods are provided for reducing reductant consumption in an exhaust aftertreatment system that includes a first scr device and a downstream second scr device, a first reductant injector upstream of the first scr device, and a second reductant injector between the first and second scr devices. Nox conversion occurs with reductant injection by the first reductant injector ...
Mounting plate for mounting injectors and directing reductant flow in exhaust conduits
Cummins Emission Solutions Inc.
April 20, 2017 - N°20170107882

An aftertreatment system comprises a scr system including at least one catalyst for decomposing constituents of an exhaust gas produced by an engine. An exhaust conduit is fluidly coupled to the scr system and is structured to deliver the exhaust gas to the scr system and defines an exhaust conduit opening on a sidewall thereof. A mounting plate is positioned ...
Ruthenium based catalysts for nox reduction
Southwest Research Institute
April 20, 2017 - N°20170107880

The present disclosure is directed at a ruthenium based catalyst for nox reduction. More specifically, ruthenium based catalysts are used for nox reduction in an internal combustion engine to reduce nox to nitrogen, at relatively high conversion and selectivity, using carbon monoxide and hydrogen as reductants. The ruthenium based catalyst has particular utility in exhaust gas recirculation such as in ...
Variable geometry exhaust conduit
Cummins Emission Solutions Inc.
April 20, 2017 - N°20170107877

A method for reducing reductant deposits in an exhaust conduit fluidly coupled to an engine comprises operating the engine to produce an exhaust gas. The exhaust gas is communicated into the exhaust conduit which has an initial cross-sectional area. An initial flow rate corresponding to an initial flow velocity of the exhaust gas entering the exhaust conduit is determined. The ...
Reductant dosing control using prediction of exhaust species in selective catalytic reduction
Paccar Inc
April 20, 2017 - N°20170106338

A system and related method for controlling reductant dosing in a selective catalyst reduction system includes a chamber containing a catalyst, and a controllable reductant dosing system that includes a controllable injector connected to a reservoir of reductant, and a controller that obtains inlet exhaust temperature, speed, and composition information, for example, from one or more sensors in the exhaust ...
System and method for varying reductant delivery pressure to aftertreatment systems
Cummins Emission Solutions Inc.
April 13, 2017 - N°20170101913

An aftertreatment system comprises a reductant storage tank and a scr system including a catalyst for reducing constituents of an exhaust gas. A reductant insertion assembly is fluidly coupled to the reductant storage tank and the scr system. A controller is communicatively coupled to the reductant insertion assembly. The controller is configured to: determine an initial pressure of the reductant, ...
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Selective dosing module control system
Cummins Emission Solutions, Inc.
March 30, 2017 - N°20170089245

Systems and methods to selectively control plurality of dosing modules may include receiving data indicative of an exhaust flow rate. An amount of reductant to be dosed may be determined based, at least in part, on the data indicative of the exhaust flow rate. A decomposition delay time may also be determined and a first dosing module and a second ...
Method for injecting reductant into an exhaust gas of an engine
Deere & Company
March 30, 2017 - N°20170089244

A method for injecting a reductant into an exhaust gas of a power system. The method includes oscillating injections of the reductant between a higher reductant injection rate and a lower reductant injection rate. The higher injection rate is high enough to result in storage of a decomposed form of the reductant on a selective catalytic reduction on-filter (“...
Method for injecting reductant into an exhaust gas of an engine using an oscillating supply ...
Deere & Company
March 30, 2017 - N°20170089243

A method for injecting a reductant into an exhaust gas of a power system. The method includes injecting the reductant at a commanded flow rate, while simultaneously oscillating a supply pressure of the reductant between a higher supply pressure and a lower supply pressure.
Uniform flow distribution of a reductant
Caterpillar Inc.
March 30, 2017 - N°20170087514

A system for uniform flow distribution of a reductant is disclosed. The system includes an injector lance and a diffuser assembly. The injector lance further includes a reductant supply conduit and an injector lance. The reductant supply conduit extends into an internal diameter of an exhaust conduit from a first end of the exhaust conduit towards a second end of ...
Emission reduction system
Caterpillar Inc.
March 23, 2017 - N°20170082002

An emission reduction system is provided. The emission reduction system includes a tank configured to store a reductant. The emission reduction system also includes a pump configured to draw the reductant from the tank and supply the reductant to an exhaust system. The pump is further configured to draw in air from an ambient air source. The emission reduction system ...
Diesel exhaust fluid deposit mitigation
Cummins Emission Solutions, Inc.
March 16, 2017 - N°20170074141

One form of the present application is an apparatus including an internal combustion engine structured to produce an exhaust flow, an exhaust system structured to receive the exhaust flow, and a reductant injector structured to inject reductant into a primary passage of the exhaust system upstream of a catalyst. The apparatus further includes an injector passage structured to receive a ...
Method of operating an aftertreatment system of an internal combustion engine
Gm Global Technology Operations Llc
March 16, 2017 - N°20170074137

A method of operating an aftertreatment system of an internal combustion engine having a lean nitrogen-oxides trap and a reductant storage device placed downstream of the lean nitrogen-oxides trap is disclosed. A regeneration of the lean nitrogen-oxides trap is performed. During the regeneration, a reductant concentration between the lean nitrogen-oxides trap and the reductant storage device is measured. An amount ...
Asynchronous reductant insertion in aftertreatment systems
Cummins Emission Solutions Inc.
March 09, 2017 - N°20170067387

An aftertreatment system comprises a first scr system, a second scr system positioned downstream of the scr system and a reductant storage tank. At least one reductant insertion assembly is fluidly coupled to the reductant storage tank. The at least one reductant insertion assembly is also fluidly coupled to the first scr system and the scr system. A controller is ...