Systems and methods for increasing nitrogen dioxide fraction in exhaust gas at low temperature

Title: Systems and methods for increasing nitrogen dioxide fraction in exhaust gas at low temperature

Abstract

An aftertreatment system includes a first oxidation catalyst, a second oxidation catalyst, and a turbocharger. The first oxidation catalyst is upstream of the turbocharger and includes a first oxidation catalyst formulation. The second oxidation catalyst is downstream of the turbocharger and includes a second oxidation catalyst formulation different than the first oxidation catalyst formulation. The second oxidation catalyst formulation is configured to promote conversion of nitric oxide (NO) to nitrogen dioxide (NO₂).

Inventors:: Zha, Yuhui; Heichelbech, John K.; Cunningham, Michael J.

Issue Date:: 2018-07-17

Research Org.:: Cummins Inc., Columbus, IN (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 1467418

Patent Number(s):: 10022667

Application Number:: 15/663,457

Assignee:: Cummins Inc. (Columbus, IN)

Patent Classifications (CPCs):: B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01D - SEPARATION

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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B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01D - SEPARATION
B01D2255/20723 - Vanadium
B01D2255/2073 - Manganese

F - MECHANICAL ENGINEERING F01 - MACHINES OR ENGINES IN GENERAL F01N - GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL
F01N3/20 - specially adapted for catalytic conversion

B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01D - SEPARATION
B01D2255/2065 - Cerium
B01D2255/20738 - Iron
B01D2257/702 - Hydrocarbons
B01D53/9454 - {characterised by a specific device}
B01D2251/2067 - Urea
B01D2257/404 - Nitrogen oxides other than dinitrogen oxide

B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01J - CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY
B01J23/44 - Palladium

B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01D - SEPARATION
B01D2255/1025 - Rhodium
B01D2255/20761 - Copper

B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01J - CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY
B01J23/42 - Platinum
B01J35/0006 - {Catalysts containing parts with different compositions}

F - MECHANICAL ENGINEERING F02 - COMBUSTION ENGINES F02M - SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
F02M26/04 - with a single turbocharger

B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01D - SEPARATION
B01D53/565 - {by treating the gases with solids}
B01D2258/012 - Diesel engines and lean burn gasoline engines
B01D53/9477 - {with catalysts positioned on separate bricks, e.g. exhaust systems}
B01D2258/018 - Natural gas engines

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

B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01D - SEPARATION
B01D2255/1021 - Platinum
B01D2255/1023 - Palladium

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DOE Contract Number:: EE0006795

Resource Type:: Patent

Resource Relation:: Patent File Date: 2017 Jul 28

Country of Publication:: United States

Language:: English

Citation Formats


                    Zha, Yuhui, Heichelbech, John K., and Cunningham, Michael J. Systems and methods for increasing nitrogen dioxide fraction in exhaust gas at low temperature.  United States: N. p., 2018. 
        Web.

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                    Zha, Yuhui, Heichelbech, John K., & Cunningham, Michael J. Systems and methods for increasing nitrogen dioxide fraction in exhaust gas at low temperature.  United States.

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                    Zha, Yuhui, Heichelbech, John K., and Cunningham, Michael J. Tue .  
        "Systems and methods for increasing nitrogen dioxide fraction in exhaust gas at low temperature".  United States.  https://www.osti.gov/servlets/purl/1467418.

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@article{osti_1467418,

  title        = {Systems and methods for increasing nitrogen dioxide fraction in exhaust gas at low temperature},

  author       = {Zha, Yuhui and Heichelbech, John K. and Cunningham, Michael J.},

  abstractNote = {An aftertreatment system includes a first oxidation catalyst, a second oxidation catalyst, and a turbocharger. The first oxidation catalyst is upstream of the turbocharger and includes a first oxidation catalyst formulation. The second oxidation catalyst is downstream of the turbocharger and includes a second oxidation catalyst formulation different than the first oxidation catalyst formulation. The second oxidation catalyst formulation is configured to promote conversion of nitric oxide (NO) to nitrogen dioxide (NO2).},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {2018},

  month        = {7}

}

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Title: Systems and methods for increasing nitrogen dioxide fraction in exhaust gas at low temperature

Abstract

Citation Formats

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