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Silicon carbide diesel particulate filter (DPF) is now recognized as the most effective and robust way to reduce not only the mass but also the number of emitted particles on diesel passenger cars. Widespread use of expensive catalytic platinum-containing coatings has contributed to increased harmful NO₂ emissions. A novel low-cost palladium-base metal coating, BMC-211, was developed which assists soot regeneration by oxygen transport and which actively removes NO₂ still having comparable passive and active soot regeneration properties. The novel coating was tested against a traditional commercial platinum coating on a modern series-produced car, on chassis dynamometer and on engine test bench.

Tighter emission regulations, fuel consumption concern, improved durability requirements, packaging and cost reduction are current drivers for after treatment systems development. As the Diesel Particulate Filter is the main component of diesel exhaust systems, catalytic function integration into the DPF has been widely investigated: it has reached an agreement, that increasing the substrate material’s porosity will thus be a solution in order to accommodate higher washcoat loading, and especially higher washcoat base material (non PGM compounds), with acceptable impact on backpressure. In addition to porosity increase, this development focuses on proposing new substrate structures for accommodating washcoat, and thus offering potential for further catalytic functions integration.