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Effect of Ash Accumulation on the Performance of Diesel Exhaust Particulate Traps
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Abstract
This paper describes the study and the results obtained to determine the performance deterioration of diesel particulate traps due to ash accumulation. Based on the ash emission rate in an engine exhaust and the full-size trap volume, a flow and distance simulation technique was developed to translate the results from bench tests of small scaled down traps to engine conditions. Fuel doped with metalloorganic additives was used to accelerate the ash loading of the scaled traps. The study was conducted on both a cellular ceramic trap and a wire-mesh trap. Results indicate that for a 60 liter, ceramic trap mounted on the exhaust of a heavy duty engine, the pressure drop, Δp, will double in approximately 90,000 km. It is also seen that for the same size wire-mesh trap, the Δp will increase by 70% of the clean trap Δp in about 200,000 km.
The paper also describes the work done to determine the effect of particulate trap pore size on ash accumulation in cellular ceramic traps. Traps of various pore sizes were subjected to accelerated loading of ash and then subjected to repeated regenerations. Results show that ash trapping seems to be irreversible.
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Citation
Sachdev, R., Wong, V., and Shahed, S., "Effect of Ash Accumulation on the Performance of Diesel Exhaust Particulate Traps," SAE Technical Paper 830182, 1983, https://doi.org/10.4271/830182.Also In
References
- MacDonald, J. S. Vaneman, G. L. “Experimental Evaluation of Fibrous Filters for Trapping Diesel Exhaust Particulates” SAE Paper 810956 September 1981
- Howitt, J. S. Montierth, M. R. “Cellular Ceramic Diesel Particulate Filter” SAE Paper 810113 February 1981
- Mogaka, Z. N. Wong, V. W. Shahed, S. M. “Performance and Regeneration Characteristics of a Cellular Ceramic Diesel Particulate Trap” SAE Paper 820272 February 1982
- Otto, K. Sieg, M. H. Zinbo, M. Bartosiewicz, L. “The Oxidation of Soot Deposits from Diesel Engines” SAE Paper 800336 February 1980
- Ford Motor Company “Response to questions raised by EPA in connection with EPA’s study of the 1985 Light Duty Diesel Particulate Standards” U.S. EPA Washington, D.C. October 1981