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Degradation resistance of silicon carbide diesel particulate filters to diesel fuel ash deposits

Published online by Cambridge University Press:  01 October 2004

D. O’Sullivan ,
M.J. Pomeroy ,
S. Hampshire  and
M.J. Murtagh
D. O’Sullivan
Affiliation:
Materials Ireland Research Centre, University of Limerick, Limerick, Ireland
M.J. Pomeroy
Affiliation:
Materials and Surface Science Institute, University of Limerick, Limerick, Ireland
S. Hampshire
Affiliation:
Materials Ireland Research Centre, University of Limerick, Limerick, Ireland, and Materials and Surface Science Institute, University of Limerick, Limerick, Ireland
M.J. Murtagh
Affiliation:
Corning Incorporated, Corning, New York 14831
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Abstract

A series of experiments were conducted to investigate chemical interactions between silicon carbide (SiC) and synthetic ash compositions expected to be deposited on the surfaces and within the pore structure of a diesel particulate filter. The chosen ash compositions simulated those arising from lubricants and three fuel types: standard diesel, diesel containing ferrocene as a catalytic additive, and diesel containing a cerium-based catalyst. Results demonstrated that SiC suffered little chemical or oxidative degradation in the presence of the ashes at 900 °C. For the ash not containing Fe or Ce, ash sintering effects were a possible mechanism causing filter blockage at temperatures above 970 °C. For ashes containing Fe or Ce, appreciable sintering effects were not observed below 1100 °C. Based upon the work conducted the suitability of SiC as a construction material for diesel particulate filters is not compromised by chemical degradation in the presence of lubricant/additive derived ash at temperatures less than 1100 °C.

Keywords

CeramicChemical reactivityEnvironmentally protective
Type
Articles
Information
Journal of Materials Research , Volume 19 , Issue 10 , October 2004 , pp. 2913 - 2921
Copyright
Copyright © Materials Research Society 2004

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References

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