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Controlled Energy Deposition in Diesel Particulate Filters During Regeneration by Means of Microwave Irradiation
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English
Abstract
Control and location of the energy input to a ceramic diesel filter is essential for successful filter regeneration. External heat sources, such as burners or resistance heaters, initiate soot combustion at the inlet face of the filter, and complete regeneration depends on the combustion front propagating throughout the filter. Uneven or uncontrolled soot combustion can cause incomplete filter regeneration and/or filter destruction.
In contrast, it is possible to provide a more uniform energy input to a filter by incorporating microwave-susceptible materials in the filter body and then using RF (microwave) energy to initiate combustion. This method gives improved control over the soot combustion and lower thermal stresses within the filter.
This paper discusses the RF engineering and materials considerations involved in RF-based regeneration of wall-flow and ceramic-foam diesel filters. The development of filters containing susceptors that couple to both electric and magnetic components of an RF field is described, together with results from prototype testing programs in which both filter types have been successfully regenerated by RF heating.
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Authors
- Frank B. Walton - Atomic Energy of Canada Ltd., Whiteshell Nuclear Research Establishment Pinawa, Manitoba, Canada
- Peter J. Hayward - Atomic Energy of Canada Ltd., Whiteshell Nuclear Research Establishment Pinawa, Manitoba, Canada
- David J. Wren - Atomic Energy of Canada Ltd., Whiteshell Nuclear Research Establishment Pinawa, Manitoba, Canada
Citation
Walton, F., Hayward, P., and Wren, D., "Controlled Energy Deposition in Diesel Particulate Filters During Regeneration by Means of Microwave Irradiation," SAE Technical Paper 900327, 1990, https://doi.org/10.4271/900327.Also In
References
- Garner C.P. Dent J.C. “Microwave Assisted Regeneration of Diesel Particulate Traps” SAE 890174
- Atomic Energy of Canada Ltd. Research Co.
- Mizrah T. Maurer A. Gauckler L. Gabathuler J.-P. “Open-Pore Ceramic Foam as Diesel Particulate Filter” SAE 890172
- Helferich R.L. Schenck R.C. “Evaluation of Stacked Element Diesel Particulate Trap Using a Newly Developed Membrane Covered Ceramic Foam Filtering Media” SAE 890787
- Kitagawa J. Hijikata T. Makino M. “Effects of DPF Volume on Thermal Failures During Regeneration” SAE 890173
- Yoshida K. Makino S. Sumiya S. Muramatsu G. Helferich R. “Simultaneous Reduction of NO x and Particulate Emissions from Diesel Engine Exhaust” SAE 892046