Diesel particulate filter (DPF) is regarded as the most useful technology to reduceparticulate matter from exhaust gas of a diesel engine. Exhaust gas entering the channelis forced to flow through the ceramic porous walls into the adjoining cells and thusleaving the particulates behind. The collected particulate matter inside the trap has to beperiodically oxidized to DPF regeneration. We have developed a nonstationary spatially2D model of the filter, soot deposition and its regeneration with detailed kinetics of sootcombustion. Optimized numerical methods and software for the solution of the modelsare described and results for various catalyst distributions along washcoat layer arepresented and discussed.
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