Modes of Catalytic Regeneration in Diesel Particulate Filters

The diesel particulate filter (DPF) technology with the use of fuel additives as regeneration aids is a promising technology for modern and future low-emissions diesel engines. The development of efficient and reliable DPF systems requires understanding of the regeneration process. Although the role of mathematical models in this respect has been widely recognized, few attempts to model the fuel-additive-assisted regeneration have been presented. In this work, a previously developed simplified authors` model is extended, to allow deeper investigation of the process. The 1D mathematical model of the catalytic regeneration in the channel of the particulate filter is based on a dynamic oxygen storage/release mechanism of additive action coupled to the transport phenomena occurring in the filter. A previously published set of full-scale measurements is employed to validate the model in a wide range of possible regeneration modes. The advantages of the present 1D model over the previous 0D model are illustrated. It is concluded that, at the present stage, the model can sufficiently describe and explain the main features of the regeneration process. The minor deviations of the model results from reality are attributed to the uncertainties of the reaction kinetics and to nonuniformities regarding flow distribution and soot deposition.more » The possible explanations are discussed, and directions for future work are suggested.« less

[1]  Jianxin Ma,et al.  Study on regeneration of diesel particulate filter using a laboratory reactor , 1990 .

[2]  Hiroshi Aoki,et al.  Numerical Simulation Model for the Regeneration Process of a Wall-Flow Monolith Diesel Particulate Filter , 1993 .

[3]  K. Pattas,et al.  Catalytic Activity in the Regeneration of the Ceramic Diesel Particulate Trap , 1992 .

[4]  Vittorio Rocco,et al.  A study of inlet flow distortion effects on automotive catalytic converters , 1991 .

[5]  Paul Zelenka,et al.  Worldwide diesel emission standards, current experiences and future needs , 1996 .

[6]  Anastassios M. Stamatelos,et al.  Computer Aided Engineering in the Design of Catalytically Assisted Trap Systems , 1997 .

[7]  John H. Johnson,et al.  The Measurement and Analysis of the Physical Character of Diesel Particulate Emissions , 1976 .

[8]  John H. Johnson,et al.  A Study of the Regeneration Process in Diesel Particulate Traps Using a Copper Fuel Additive , 1996 .

[9]  Susan T. Bagley,et al.  A Review of Diesel Particulate Control Technology and Emissions Effects - 1992 Horning Memorial Award Lecture , 1994 .

[10]  B. H. Engler,et al.  Diesel Emission Control , 1991 .

[11]  Grigorios C. Koltsakis,et al.  Modeling thermal regeneration of wall‐flow diesel particulate traps , 1996 .

[12]  Farhang Shadman,et al.  Thermal regeneration of diesel-particulate monolithic filters , 1985 .

[13]  Per Stobbe,et al.  Flow characteristics of SIC diesel particulate filter materials , 1994 .

[14]  Werner Engeler,et al.  Regeneration of Particulate Filters at Low Temperatures , 1983 .

[15]  Jianxin Ma,et al.  Kinetic study and modelling of diesel particulate filter regeneration , 1991 .

[16]  Anastassios M. Stamatelos,et al.  Modeling Catalytic Regeneration of Wall-Flow Particulate Filters , 1996 .