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An Investigative Study of Sudden Pressure Increase Phenomenon Across the SCR on Filter Catalyst
Technical Paper
2016-01-2319
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
In the previous research1), the authors discovered that the sudden pressure increase phenomenon in diesel particulate filter (DPF) was a result of soot collapse inside DPF channels. The proposed hypothesis for soot collapse was a combination of factors such as passive regeneration, high humidity, extended soak period, high soot loading and high exhaust flow rate. The passive regeneration due to in-situ NO2 and high humidity caused the straw like soot deposited inside DPF channels to take a concave shape making the collapse easier during high vehicle acceleration.
It was shown that even if one of these factor was missing, the undesirable soot collapse and subsequent back pressure increase did not occur. Currently, one of the very popular NOx reduction technologies is the Selective Catalytic Reduction (SCR) on Filter which does not have any platinum group metal (PGM) in the washcoat. This work investigated the possibility of sudden pressure increase due to soot collapse in SCR on Filter
Absence of PGM prevented any in-situ NO2 formation in SCR on Filter. The passive regeneration in this case did not create the gap between the soot layers and filter wall that was observed previously with the catalyzed DPF. Consequently, the concave shape of soot under high humidity and subsequent soot collapse causing sudden pressure rise in the SCR on Filter were not observed.
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Citation
Kim, K., Mital, R., and Higuchi, T., "An Investigative Study of Sudden Pressure Increase Phenomenon Across the SCR on Filter Catalyst," SAE Technical Paper 2016-01-2319, 2016, https://doi.org/10.4271/2016-01-2319.Also In
References
- Kim , K. , Mital , R. , Higuchi , T. , Chan , S. et al. An Investigative Study of Sudden Pressure Increase Phenomenon Across the DPF SAE Technical Paper 2014-01-1516 2014 10.4271/2014-01-1516
- http://www.dieselnet.com/
- Rui Fukui ., Yuki Okamoto ., and Masayuki Nakao Experimental Analysis of Sudden Pressure Increase Phenomenon by Real-Time Internal Observation of Diesel Particulate Filter ASEM 2015 Internal Combustion Engine Division Fall Technical Conference 1CEF2015, ICEF2015-1038
- Tan , J. , Solbrig , C. , and Schmieg , S. The Development of Advanced 2-Way SCR/DPF Systems to Meet Future Heavy-Duty Diesel Emissions SAE Technical Paper 2011-01-1140 2011 10.4271/2011-01-1140
- Colombo , M. , Koltsakis , G. , and Koutoufaris , I. A Modeling Study of Soot and De-NO x Reaction Phenomena in SCRF Systems SAE Technical Paper 2011-37-0031 2011 10.4271/2011-37-0031
- https://en.wikipedia.org/wiki/Selective_catalytic_reduction
- Cavataio , G. , Girard , J. , and Lambert , C. Cu/Zeolite SCR on High Porosity Filters: Laboratory and Engine Performance Evaluations SAE Technical Paper 2009-01-0897 2009 10.4271/2009-01-0897
- Ballinger , T. , Cox , J. , Konduru , M. , De , D. et al. Evaluation of SCR Catalyst Technology on Diesel Particulate Filters SAE Int. J. Fuels Lubr. 2 1 369 374 2009 10.4271/2009-01-0910
- Hohl , Y. SCR on Filter - The Future for Construction Machinery 10th International CTI Conference, SCR Systems Stuttfgart July 8, 2014