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Regeneration of Particulate Filters at Low Temperatures
ISSN: 0148-7191, e-ISSN: 2688-3627
Published February 01, 1983 by SAE International in United States
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Due to good trapping abilities, the ceramic trap filter was chosen for the reduction of the particulate emission of Diesel engines.
Both, tests and the analysis of the regeneration kinetic show that in real-world application the lite-off limit of 500 °C may not be exceeded.
The minimum exhaust gas temperature necessary for regeneration without the use of a catalyst, can be reduced to approx. 200 °C to 250 °C with the use of fuel additives.
The use of additives for the filter regeneration showed excellent results in real-world conditions as well as with endurance tests.
There was no significant change in emissions or specific fuel consumption about 20,000 km as compared to the operation without additives.
The regeneration dependability however, is questionable because of the destruction of the filter. This destruction is caused by exceeding the melting point of the ceramic by thermal reactions due to erratic regeneration and by thermal reactions due to a high temperature increase rate after exceeding the lite-off limit.
For the increase of the service life of the trap, a ceramic material with a lower thermal expansion coefficient is required. The start of regeneration can be achieved simultaneously by significantly exceeding the lite-off limit.
Finally, with the control of the amount of oxygen in the exhaust gas (i.e. with EGR), it is possible to avoid exceeding the melting point of the ceramic.
CitationWiedemann, B., Doerges, U., Engeler, W., and Poettner, B., "Regeneration of Particulate Filters at Low Temperatures," SAE Technical Paper 830086, 1983, https://doi.org/10.4271/830086.
- Smith, George W. “Kinetic Aspects of Diesel Soot Coagulation” SAE Paper 820466
- Howitt, John S. “Cellular Ceramic Diesel Particulate Filter of Corning” VW Diesel Particulate Symposium 09.03.82
- Mochida, Shigeru “Ceramic Honeycomb Diesel Particulate Filter of NGK” VW Diesel Particulate Symposium 09.03.82
- Otto, K. Siog, M. H. Zinbo, M. Bartosiewicz, L. “The Oxidation of Soot Deposits from Diesel Engines” SAE Paper 800336
- Mogaka, Z. M. Wong V. W. Shaded, S. M. “Performance and Regeneration Characteristics of a Cellular Ceramic Diesel Particulate Trap” SAE Paper 820272
- Rudy, Wayne M. “Diesel Particulate Removal and Regeneration Using Wall Flow Filters” VW Diesel Particulate Symposium 09.03.82
- Koberstein, E. Pletka, H. Völker, H. “Catalytically Coated Diesel Filters and Test Procedure for their Evaluation” VW Diesel Particulate Symposium 09.03.82
- Wade, W. R. White, J. E. Florek, J. J. “Diesel Particulate Trap Regeneration Techniques” SAE Paper 810118
- Öser Polat Thorns, Ulrich “Particulate Control Systems for Diesel Engines Using Catalytically Coated and Uncoated Traps with Consideration of Regeneration Techniques” SAE Paper, presented at International Congress, Detroit March 1983