Degradationresistance of silicon carbide diesel particulate filters to diesel fuel ash deposits

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 contauning ferrocene as a catalytic additive, and diesel contauning 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 contauning Fe or Ce, ash sintering effects were a possible mechanism causing filter blockage at temperatures above 970 °C. For ashes contauning 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.

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Correspondence to D. O’Sullivan.

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O’Sullivan, D., Pomeroy, M.J., Hampshire, S. et al. Degradationresistance of silicon carbide diesel particulate filters to diesel fuel ash deposits. Journal of Materials Research 19, 2913–2921 (2004). https://doi.org/10.1557/JMR.2004.0373

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