Browse Publications Technical Papers 2006-01-1524

Filtration and Regeneration Performance of a Catalyzed Metal Foam Particulate Filter 2006-01-1524

The objective of this study is to present a particulate filter concept, based on a new porous material: INCOFOAM® HighTemp, a Ni-based superalloy foam. The paper examines the filtration and pressure drop characteristics as well as the regeneration performance of different filter configurations, based on experimental data and modeling.
A number of different foam structures with variable pore characteristics are studied. The experimental testing covers flow and pressure drop behavior with air and exhaust gas, filtration efficiency measurements as function of particle size and regeneration rate measurements. The testing starts from mini-scale reactors and proceeds to real exhaust testing on the engine bench as well as vehicle tests on the chassis dynamometer and on-road. In parallel, a previously developed mathematical model is applied to study and understand the filtration and pressure drop mechanisms in the case of clean and soot loaded filters. Moreover, CFD studies are also employed to optimize the macroscopic structure of the metal foam filter.
The results show that the foam filter has a potential for reaching a filtration efficiency of the order of 90% at an acceptably low pressure drop. This can be accomplished by a proper macroscopic design of the filter, as well as careful selection of the microscopic pore size parameters. For the case of catalyst coated foams, the regeneration rates measured at low temperatures are very high, suggesting a superior exploitation of the catalyst compared to conventional coated wall-flow filter concepts. Finally, dedicated experimental tests indicate that no blow-off of the accumulated soot is observed even during severe operating modes.


Subscribers can view annotate, and download all of SAE's content. Learn More »


Members save up to 16% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.
We also recommend:

Simulation of Exhaust Gas Aftertreatment Systems - Thermal Behavior During Different Operating Conditions


View Details


Application of Genetic Algorithm for the Calibration of the Kinetic Scheme of a Diesel Oxidation Catalyst Model


View Details


Synergetic DOC-DPF System Optimization Using Advanced Models


View Details