This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Regeneration Behavior and Transient Thermal Response of Diesel Particulate Filters
Technical Paper
2001-01-1342
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Event:
SAE 2001 World Congress
Language:
English
Abstract
The diesel particulate filter (DPF) is effective for particulate removal from diesel engine exhaust under a variety of conditions, but development of regeneration strategies remains an ongoing challenge, primarily because of low exhaust temperatures. This paper addresses two issues related to DPF regeneration: the thermal response of DPFs during regeneration events and the soot oxidation (i.e., regeneration) rate at varying temperature, flow rate, oxygen content, and unsteady inlet temperature.
The experiments are performed in a laboratory reactor, which provides gas temperature and composition similar to diesel engine exhaust. The catalyzed and uncatalyzed DPFs used in this study are first loaded with soot on an engine dynamometer at a fixed load and engine speed. During constant temperature regeneration experiments, the change in pressure drop is monitored to determine the extent of regeneration. Mass loss measurements are used to calculate the soot oxidation rate and apparent activation energy for each condition tested. The catalytic coating increases the mass loss rate at a given inlet temperature for each test condition, and also sharply decreases the minimum regeneration temperature. Oxygen content has a strong impact on the soot oxidation rate for the coated and uncoated DPFs.
The effect of time-varying inlet gas temperatures on DPF exit temperature are predicted using a numerical model. Comparisons between the model and experiments are favorable. The model shows that a time-varying inlet temperature has little effect on the DPF temperature for high DPF thermal inertia (i.e., the product of mass and heat capacity), low mass flow rate, and high wave frequency. At the experimental conditions examined in this paper, high frequency temperature changes have little effect on the regeneration of DPFs below the ignition temperature, but significant effect above the ignition temperature. A combined analysis of the results provides insight into the regeneration process and could lead to improved strategies involving thermal management of the particulate control system.
Recommended Content
Authors
Topic
Citation
Rumminger, M., Zhou, X., Balakrishnan, K., Edgar, B. et al., "Regeneration Behavior and Transient Thermal Response of Diesel Particulate Filters," SAE Technical Paper 2001-01-1342, 2001, https://doi.org/10.4271/2001-01-1342.Also In
References
- Awara, A.E. Opris, C.N. Johnson, J.H. 1997 “A theoretical and experimental study of the regeneration process in a silicon carbide particulate trap using a copper fuel additive” SAE paper 970188
- Bouchez, M. Dementhon, J.B. 2000 “Strategies for the control of particulate trap regeneration” SAE paper 2000-01-0472
- Cooper, B.J. Hung, H.J. Thoss, J.E. 1990
- Gadde, S.B. Johnson, J.H. 1999 “A computational model describing the performance of a ceramic diesel particulate trap in steady-state operation and over a transient cycle” SAE paper 1999-01-0465
- Hoffmann, U. Rieckmann, T. Ma, J. 1991 “Kinetic study and modelling of diesel particulate filter regeneration” Chemical Engineering Science 46 4 1101 1113
- Jelles, S.J. Krul, R.R. Makkee, M. Moulijn, J.A. 1999 “The influence of NO x on the oxidation of metal activated diesel soot” Catalysis Today 53 623 630
- Johnson, J.H. Bagley, S.T. Gratz, L. D. Leddy, D. G. 1994 “A review of diesel particulate control technology and emissions effects - 1992 Horning memorial award lecture” SAE Paper 940233
- Koltsakis, G.C. 1997 “Warm-up behavior of monolithic reactors under non-reacting conditions” Chem. Eng. Sci. 52 17 2891 2899
- Koltsakis, G.C. Stamatelos, A.M. 1996 “Modeling catalytic regeneration of wall-flow particulate filters” Ind. Eng. Chem. Res. 35 2 13
- Koltsakis, G.C. Stamatelos, A.M. 1996 “Modeling thermal regeneration of wall-flow diesel particulate traps” AIChE J. 42 6 1662 1672
- Koltsakis, G.C. Stamatelos, A.M. 1999 “Dynamic behavior issues in three-way catalyst modeling” AIChE J. 45 3 603 614
- Konstandopoulos, A.G. Kostoglou, M. Skaperdas, E. Papaioannou, E. Zarvalis, D. Kladopoulou, E. 2000 “Fundamental studies of diesel particulate filters: transient loading, regeneration and aging” SAE paper 2000-01-1016
- Mul, G. Zhu, W.D. Kapteijn, F. Moulijn, J.A. 1998 “The effect of NO x and CO on the rate of transition metal oxide catalyzed carbon black oxidation: an exploratory study” Applied Catalysis B: Environmental 17 205 220
- Neeft, J.P.A. Makkee, M. Moulijn, J.A. 1996 “Catalysts for the oxidation of soot from diesel exhaust gases. I. An Exploratory Study” Applied Catalysis B: Environmental 8 57 78
- Neeft, J.P.A. van Pruissen, O.P. Makkee, M. Moulijn, J.A. 1997 “Catalysts for the oxidation of soot from diesel exhaust gases. II. Contact between soot and catalyst under practical conditions” Applied Catalysis B: Environmental 12 21 31
- Opris, C.N. Johnson, J.H. 1998 “A 2-D computational model describing the heat transfer, reaction kinetics and regeneration characteristics of a ceramic diesel particulate trap” SAE paper 980546
- Otto, K. Seig, M.H. Zinbo, M. Bartosiewicz, L. 1980 “The oxidation of soot deposits from diesel engines” SAE Paper 800336
- Page, D.L. MacDonald, R.J. Edgar, B.L. 1999 “The QuadCAT four-way catalytic converter: an integrated aftertreatment system for diesel engines” SAE paper 1999-01-2924
- Pauli, E. Lepperhoff, G. Pischinger, F. 1983 “The description of the regeneration behavior of diesel particulate traps with the aid of a mathematical model” SAE Paper 830180
- 1997 1998 1999 2000
- Stamatelos, A.M. Koltsakis, G.C. Kandylas, I.P. Pontikakis, G.N. 1999 “Computer aided engineering in diesel exhaust aftertreatment systems design” Proc Instn Mech Engrs: Part D 213 545 560
- Stanmore, B. Brilhac, J.-F. Gilot, P. Gilot, P. 1999 “The ignition and combustion of cerium doped diesel soot” SAE Paper 1999-01-0115
- Uchisawa, J.O. Obuchi, A. Enomoto, R. Liu, S.T. Nanba, T. Kushiyama, S. 2000 “Catalytic performance of Pt supported on various metal oxides in the oxidation of carbon black” Applied Catalysis B: Environmental 26 17 24
- Uchisawa, J.O. Obuchi, A. Ogata, A. Enomoto, R. Kushiyama, S. 1999 “Effect of feed gas composition on the rate of carbon oxidation with Pt/SiO2 and the oxidation mechanism” Applied Catalysis B: Environmental 21 9 17
- Uchisawa, J.O. Obuchi, A. Zhao, Z. Kushiyama, S. 1998 “Carbon oxidation with platinum supported catalysts” Applied Catalysis B: Environmental 18 L183 L187
- Guanglong Zhang Lunhui Liang Jiahua Chan Xiuren Zhao 1994 “Kinetic analysis on the igniting characteristics of diesel particulates” SAE Paper 941772