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

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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 (NO ₂).

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

Issue Date:: 2018-07-17

OSTI Identifier:: 1467418

Assignee:: Cummins Inc. (Columbus, IN) NETL

Patent Number(s):: 10,022,667

Application Number:: 15/663,457

Contract Number:: EE0006795

Resource Relation:: Patent File Date: 2017 Jul 28

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

Sponsoring Org:: USDOE

Country of Publication:: United States

Language:: English

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