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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:
; ;
Issue Date:
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
B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01J - CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY
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.
Zha, Yuhui, Heichelbech, John K., & Cunningham, Michael J. Systems and methods for increasing nitrogen dioxide fraction in exhaust gas at low temperature. United States.
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.
@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}
}

Works referenced in this record:

Methods and systems for emission system control
patent, January 2012


EGR extraction immediately downstream pre-turbo catalyst
patent, August 2012


Nitrogen dioxide generation diagnostic for a diesel after-treatment system
patent, March 2015


Pre-turbocharger catalyst
patent, April 2015


Improvements in Emissions Control
patent-application, May 2011


Exhaust Aftertreatment System and Method
patent-application, April 2014


Exhaust Treatment Apparatus and Method
patent-application, August 2016