Method and apparatus to selectively reduce NO.sub.x in an exhaust gas feedstream

Schmieg, Steven J; Blint, Richard J; Den, Ling; Viola, Michael B; Lee, Jong-Hwan

Title: Method and apparatus to selectively reduce NO.sub.x in an exhaust gas feedstream

Abstract

A method and apparatus are described to selectively reduce NO.sub.x emissions of an internal combustion engine. An exhaust aftertreatment system includes an injection device operative to dispense a hydrocarbon reductant upstream of a silver-alumina catalytic reactor device. A control system determines a NO.sub.x concentration and hydrocarbon/NOx ratio based upon selected parameters of the exhaust gas feedstream and dispenses hydrocarbon reductant during lean engine operation. Included is a method to control elements of the feedstream during lean operation. The hydrocarbon reductant may include engine fuel.

Inventors:

Schmieg, Steven J ^[1]; Blint, Richard J ^[2]; Den, Ling ^[3]; Viola, Michael B ^[4]; Lee, Jong-Hwan ^[5]

Troy, MI
Shelby Township, MI
Sterling Heights, MI
Macomb Township, MI
Rochester Hills, MI

Issue Date:: 2011-08-30

Research Org.:: GM Global Technology Operations LLC (Detroit, MI)

Sponsoring Org.:: USDOE

OSTI Identifier:: 1023934

Patent Number(s):: 8006481

Application Number:: 11/533,434

Assignee:: GM Global Technology Operations LLC (Detroit, MI)

Patent Classifications (CPCs):: F - MECHANICAL ENGINEERING F01 - MACHINES OR ENGINES IN GENERAL F01N - GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL

Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02T - CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

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F - MECHANICAL ENGINEERING F01 - MACHINES OR ENGINES IN GENERAL F01N - GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL
F01N2560/07 - the means being an exhaust gas flow rate or velocity meter or sensor, intake flow meters only when exclusively used to determine exhaust gas parameters
F01N2610/03 - the substance being hydrocarbons, e.g. engine fuel
F01N2560/025 - for measuring or detecting O2, e.g. lambda sensors

Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02T - CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
Y02T10/12 - Technologies for the improvement of indicated efficiency of a conventional ICE

F - MECHANICAL ENGINEERING F01 - MACHINES OR ENGINES IN GENERAL F01N - GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL
F01N2560/026 - for measuring or detecting NOx
F01N2610/146 - Control thereof, e.g. control of injectors or injection valves
F01N2560/06 - the means being a temperature sensor
F01N3/208 - {Control of selective catalytic reduction [SCR], e.g. dosing of reducing agent}

Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02A - TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
Y02A50/20 - Air quality improvement or preservation

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DOE Contract Number:: FC26-02NT41218

Resource Type:: Patent

Country of Publication:: United States

Language:: English

Subject:: 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Citation Formats


                    Schmieg, Steven J, Blint, Richard J, Den, Ling, Viola, Michael B, and Lee, Jong-Hwan. Method and apparatus to selectively reduce NO.sub.x in an exhaust gas feedstream.  United States: N. p., 2011. 
        Web.

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                    Schmieg, Steven J, Blint, Richard J, Den, Ling, Viola, Michael B, & Lee, Jong-Hwan. Method and apparatus to selectively reduce NO.sub.x in an exhaust gas feedstream.  United States.

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                    Schmieg, Steven J, Blint, Richard J, Den, Ling, Viola, Michael B, and Lee, Jong-Hwan. Tue .  
        "Method and apparatus to selectively reduce NO.sub.x in an exhaust gas feedstream".  United States.  https://www.osti.gov/servlets/purl/1023934.

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@article{osti_1023934,

  title        = {Method and apparatus to selectively reduce NO.sub.x in an exhaust gas feedstream},

  author       = {Schmieg, Steven J and Blint, Richard J and Den, Ling and Viola, Michael B and Lee, Jong-Hwan},

  abstractNote = {A method and apparatus are described to selectively reduce NO.sub.x emissions of an internal combustion engine. An exhaust aftertreatment system includes an injection device operative to dispense a hydrocarbon reductant upstream of a silver-alumina catalytic reactor device. A control system determines a NO.sub.x concentration and hydrocarbon/NOx ratio based upon selected parameters of the exhaust gas feedstream and dispenses hydrocarbon reductant during lean engine operation. Included is a method to control elements of the feedstream during lean operation. The hydrocarbon reductant may include engine fuel.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {2011},

  month        = {8}

}

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Works referenced in this record:

In-Cylinder Production of Hydrogen During Net-Lean Diesel Operation
conference, April 2006

West, Brian; Huff, Shean; Parks, James
SAE 2006 World Congress & Exhibition, SAE Technical Paper Series
https://doi.org/10.4271/2006-01-0212

Selective Catalytic Reduction of NOx Emissions from a 5.9 Liter Diesel Engine Using Ethanol as a Reductant
conference, October 2003

Kass, Michael D.; Thomas, John F.; Lewis, Samuel A.
SAE Powertrain & Fluid Systems Conference & Exhibition, SAE Technical Paper Series
https://doi.org/10.4271/2003-01-3244

Selective Catalytic Reduction of NOx with N-Free Reductants
journal, January 1995

Shelef, M.
Chemical Reviews, Vol. 95, Issue 1
https://doi.org/10.1021/cr00033a008

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Title: Method and apparatus to selectively reduce NO.sub.x in an exhaust gas feedstream

Abstract

Citation Formats

In-Cylinder Production of Hydrogen During Net-Lean Diesel Operation conference, April 2006

Selective Catalytic Reduction of NOx Emissions from a 5.9 Liter Diesel Engine Using Ethanol as a Reductant conference, October 2003

Selective Catalytic Reduction of NOx with N-Free Reductants journal, January 1995

In-Cylinder Production of Hydrogen During Net-Lean Diesel Operation
conference, April 2006

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conference, October 2003

Selective Catalytic Reduction of NOx with N-Free Reductants
journal, January 1995