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A Study on the Improvement of NOx Reduction Efficiency for a Urea SCR System Waseda University
- Format:
- Conference/Event
- Author/Creator:
- Nishiyama, Nishiyama, author.
- Conference Name:
- JSAE/SAE 2015 International Powertrains, Fuels & Lubricants Meeting (2015-09-01 : Kyoto, Japan)
- Language:
- English
- Physical Description:
- 1 online resource
- Place of Publication:
- Warrendale, PA SAE International 2015
- Summary:
- Urea SCR (Selective Catalytic Reduction) exhaust after-treatment systems are one of the most promising measures to reduce NOx emissions from diesel engines. Both Cu-zeolite (Cu-SCR) and Fe-zeolite (Fe-SCR) urea SCR systems have been studied extensively but not many detailed studies have been conducted on the combination of both systems. Thus, we carried out studies on such Combined-SCR systems and their capability to reduce NOx under various engine operating conditions. We also conducted transient engine tests using different catalyst systems to compare their performance. The results show that combined-SCR systems can reduce NOx more effectively than Fe-SCR or Cu-SCR alone. The best NOx reduction performance was achieved at a Cu ratio of 0.667 (id est Fe: Cu =1: 2). Combined-SCR thus apparently benefits from the characteristics of both Cu-SCR and Fe-SCR, allowing it to reduce NOx over a wide range of operating conditions
- Notes:
- Vendor supplied data
- Publisher Number:
- 2015-01-2014
- Access Restriction:
- Restricted for use by site license
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