Development of a Diesel Particulate Filter Composition and Its Effect on Thermal Durability and Filtration Performance 940235
This paper details the development of the EX-80 composition, a new cordierite material for use as a diesel particulate filter (DPF), that was developed based on the following objectives; (1) improved thermal durability, (2) high filtration efficiency and (3) low pressure drop. The achievement of these goals was demonstrated through engine testing, stress modeling, and other evaluations. EX-80 has a low coefficient of thermal expansion (CTE) averaging less than 4x10-7°C-1 (25°C-800°C), the Modulus of Rupture (MOR) averages greater than 350 psi and the Modulus of Elasticity (MOE) averages less than 0.8 x 106 psi. The improvement of these three properties has resulted in improved thermal durability for EX-80 as compared to the current Corning DPF compositions (EX-47, EX-54 and EX-66). The new cordierite composition has been designed to achieve a low pressure drop as a function of soot loading (0.30 inHg/gm of soot collected), coupled with high efficiency, averaging greater than 90%. Engine testing was performed by Ortech International on a Detroit Diesel 6V92TA DDECII engine to evaluate filtration performance. In addition to confirming that EX-80 meets the filtration efficiency and back pressure goals, microscopy studies of engine tested filters has led to further understanding of the filtration mechanism for wall-flow filters.
Citation: Murtagh, M., Sherwood, D., and Socha, L., "Development of a Diesel Particulate Filter Composition and Its Effect on Thermal Durability and Filtration Performance," SAE Technical Paper 940235, 1994, https://doi.org/10.4271/940235. Download Citation
Martin J. Murtagh, Diana L. Sherwood, Louis S. Socha
International Congress & Exposition
Diesel Exhaust Aftertreatment 1994-SP-1020, Diesel Particulate Filter Technology-PT-124, SAE 1994 Transactions: Journal of Engines-V103-3