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The performance of radial type metal foam DPF was studied. The radial type metal foam DPF was built by rolling INCOfoam® HighTemp into a hollow cylinder and installing it inside the DPF can with a conical flow reflector. Several types of metal foam DPF were tested. They are different in filter thickness, mean pore size, and Platinum coating with 2.5g/l or not. The test mode was determined to simulate the on-road vehicle speeds on the engine bench. In the testing vehicle speeds, the SOF in total PM emissions was so high due to the low engine load that the PM reduction via Platinum coating was dominant. Compared with cordierite filters, the radial type metal foam DPF showed similar PM reduction rate but lower increase in Δp during engine run at steady engine conditions due to their large mean pore sizes. Compared with axial type metal foam DPF studied in previous studies, the radial type metal foam DPF provides 7 times higher filtering area which enables higher PM reduction rate and lower Δp across DPF. The Platinum coated radial type metal foam filter was proven to be suitable for the replacement for cordierite filter in that it provides slow increase in Δp but comparable PM reduction rate.

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UCI(KEPA) : I410-ECN-0101-2009-556-017191220