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Pulsed discharge regeneration of diesel particulate filters

journal contribution
posted on 02.10.2013 by K. Graupner, J.G.P. Binner, N. Fox, Colin Garner, J.E. Harry, David W. Hoare, Karim S. Ladha, Alex Mason, Andrew Williams
A novel method for the removal of soot from a diesel particulate filter using pulsed electric discharges is presented. High voltage pulses of between 18 and 25 kV of nano to microsecond duration and with pulse energies of typically 100–200 mJ were applied to the filter via a series spark gap. Initial slow erosion of the soot layer proceeds via the formation of microdischarges. Subsequent spark discharges removed the accumulated soot more effectively from a larger filter volume. Average soot removal rates of *0.1–0.2 g/min were achieved at 50 Hz breakdown frequency by optimizing both electrode geometry and breakdown voltage. On-engine long term testing of the technology showed soot removal by pulsed discharge to be reliable, efficient and uniform; a total of 100 g of soot was deposited and removed over 18 filter regeneration cycles.

History

School

  • Mechanical, Electrical and Manufacturing Engineering

Citation

GRAUPNER, K. ... et al., 2013. Pulsed discharge regeneration of diesel particulate filters. Plasma Chemistry and Plasma Processing, 33 (2), pp. 467 - 477.

Publisher

© Springer

Version

VoR (Version of Record)

Publication date

2013

Notes

Closed access. This article was published in the journal Plasma Chemistry and Plasma Processing [© Springer] and the definitive version is available at: http://dx.doi.org/10.1007/s11090-013-9433-0

ISSN

0272-4324

Language

en

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