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

Patent · Tue Jul 17 00:00:00 EDT 2018

OSTI ID:1467418

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

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).

• Research Organization: Cummins Inc., Columbus, IN (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: EE0006795
• Assignee: Cummins Inc. (Columbus, IN)
• Patent Number(s): 10,022,667
• Application Number: 15/663,457
• OSTI ID: 1467418
• Resource Relation: Patent File Date: 2017 Jul 28
• Country of Publication: United States
• Language: English