NOx adsorber and method of regenerating same

Endicott, Dennis L; Verkiel, Maarten; Driscoll, James J

Title: NOx adsorber and method of regenerating same

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Abstract

New technologies, such as NOx adsorber catalytic converters, are being used to meet increasingly stringent regulations on undesirable emissions, including NOx emissions. NOx adsorbers must be periodically regenerated, which requires an increased fuel consumption. The present disclosure includes a method of regenerating a NOx adsorber within a NOx adsorber catalytic converter. At least one sensor positioned downstream from the NOx adsorber senses, in the downstream exhaust, at least one of NOx, nitrous oxide and ammonia concentrations a plurality of times during a regeneration phase. The sensor is in communication with an electronic control module that includes a regeneration monitoring algorithm operable to end the regeneration phase when a time rate of change of the at least one of NOx, nitrous oxide and ammonia concentrations is after an expected plateau region begins.

Inventors:

Endicott, Dennis L ^[1]; Verkiel, Maarten ^[2]; Driscoll, James J ^[3]

Peoria, IL
Metamora, IL
Dunlap, IL

Issue Date:: 2007-01-30

Research Org.:: Caterpillar Inc., Deerfield, IL (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 902919

Patent Number(s):: 7168243

Application Number:: 11/074,402

Assignee:: Caterpillar Inc (Peoria, IL)

Patent Classifications (CPCs):: F - MECHANICAL ENGINEERING F02 - COMBUSTION ENGINES F02D - CONTROLLING COMBUSTION ENGINES

F - MECHANICAL ENGINEERING F01 - MACHINES OR ENGINES IN GENERAL F01N - GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL

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F - MECHANICAL ENGINEERING F02 - COMBUSTION ENGINES F02D - CONTROLLING COMBUSTION ENGINES
F02D41/146 - {the characteristics being an NOx content or concentration}

F - MECHANICAL ENGINEERING F01 - MACHINES OR ENGINES IN GENERAL F01N - GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL
F01N2610/03 - the substance being hydrocarbons, e.g. engine fuel
F01N2560/026 - for measuring or detecting NOx

F - MECHANICAL ENGINEERING F02 - COMBUSTION ENGINES F02D - CONTROLLING COMBUSTION ENGINES
F02D41/029 - {the exhaust gas treating apparatus being a particulate filter}

F - MECHANICAL ENGINEERING F01 - MACHINES OR ENGINES IN GENERAL F01N - GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL
F01N3/0842 - {Nitrogen oxides}
F01N2430/08 - by modifying ignition or injection timing

Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02C - CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
Y02C20/10 - of nitrous oxide

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

F - MECHANICAL ENGINEERING F01 - MACHINES OR ENGINES IN GENERAL F01N - GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL
F01N2570/145 - Dinitrogen oxide
F01N3/0871 - {Regulation of absorbents or adsorbents, e.g. purging

Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02T - CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
Y02T10/40 - Engine management systems

F - MECHANICAL ENGINEERING F02 - COMBUSTION ENGINES F02D - CONTROLLING COMBUSTION ENGINES
F02D2041/1468 - {the characteristics being an ammonia content or concentration of the exhaust gases}
F02D41/0275 - {the exhaust gas treating apparatus being a NOx trap or adsorbent}

F - MECHANICAL ENGINEERING F01 - MACHINES OR ENGINES IN GENERAL F01N - GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL
F01N9/00 - Electrical control of exhaust gas treating apparatus
F01N2430/06 - by varying fuel-air ratio, e.g. by enriching fuel-air mixture

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DOE Contract Number:: FC05-00OR22806

Resource Type:: Patent

Country of Publication:: United States

Language:: English

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

Citation Formats


                    Endicott, Dennis L, Verkiel, Maarten, and Driscoll, James J. NOx adsorber and method of regenerating same.  United States: N. p., 2007. 
        Web.

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                    Endicott, Dennis L, Verkiel, Maarten, & Driscoll, James J. NOx adsorber and method of regenerating same.  United States.

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                    Endicott, Dennis L, Verkiel, Maarten, and Driscoll, James J. Tue .  
        "NOx adsorber and method of regenerating same".  United States.  https://www.osti.gov/servlets/purl/902919.

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@article{osti_902919,

  title        = {NOx adsorber and method of regenerating same},

  author       = {Endicott, Dennis L and Verkiel, Maarten and Driscoll, James J},

  abstractNote = {New technologies, such as NOx adsorber catalytic converters, are being used to meet increasingly stringent regulations on undesirable emissions, including NOx emissions. NOx adsorbers must be periodically regenerated, which requires an increased fuel consumption. The present disclosure includes a method of regenerating a NOx adsorber within a NOx adsorber catalytic converter. At least one sensor positioned downstream from the NOx adsorber senses, in the downstream exhaust, at least one of NOx, nitrous oxide and ammonia concentrations a plurality of times during a regeneration phase. The sensor is in communication with an electronic control module that includes a regeneration monitoring algorithm operable to end the regeneration phase when a time rate of change of the at least one of NOx, nitrous oxide and ammonia concentrations is after an expected plateau region begins.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {2007},

  month        = {1}

}

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