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Sustained Low Temperature NOx Reduction
Technical Paper
2018-01-0341
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Sustained NOx reduction at low temperatures, especially in the 150-200 °C range, shares some similarities with the more commonly discussed cold-start challenge, however, poses a number of additional and distinct technical problems. In this project, we set a bold target of achieving and maintaining 90% NOx conversion at the SCR catalyst inlet temperature of 150 °C. This project is intended to push the boundaries of the existing technologies, while staying within the realm of realistic future practical implementation.
In order to meet the resulting challenges at the levels of catalyst fundamentals, system components, and system integration, Cummins has partnered with the DOE, Johnson Matthey, and Pacific Northwest National Lab and initiated the Sustained Low-Temperature NOx Reduction program at the beginning of 2015 and completed in 2017. Through this collaboration, we are exploring catalyst formulations and catalyst architectures with enhanced catalytic activity at 150 °C; opportunities to approach the desirable ratio of NO and NO2 in the SCR feed gas; options for robust low-temperature reductant delivery; and the requirements for the overall system integration. This paper will provide information on the approach used and share results of an on-engine performance demonstration on the path towards a commercially viable solution.
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Authors
- Yuhui Zha - Cummins Inc.
- Michael Cunningham - Cummins Inc.
- Yadan Tang - Cummins Inc.
- Anand Srinivasan - Cummins Inc.
- Jinyong Luo - Cummins Inc.
- John Heichelbech - Cummins Inc.
- Venkata Lakkireddy - Cummins Inc.
- Aleksey Yezerets - Cummins Inc.
- Sade Ruffin - Cummins Emission Solutions
- Zhehao Wei - Johnson Matthey Inc.
- Joseph Fedeyko - Johnson Matthey Inc.
- Balaji Sukumar - Johnson Matthey Inc.
- Howard Hess - Johnson Matthey Inc.
- Feng Gao - Pacific Northwest National Laboratory
- Janos Szanyi - Pacific Northwest National Laboratory
- Yong wang - Pacific Northwest National Laboratory
Topic
Citation
Zha, Y., Cunningham, M., Tang, Y., Srinivasan, A. et al., "Sustained Low Temperature NOx Reduction," SAE Technical Paper 2018-01-0341, 2018, https://doi.org/10.4271/2018-01-0341.Data Sets - Support Documents
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References
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