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Development of a dosing strategy for a heavy-duty diesel exhaust cleaning system based on NOx storage and reduction technology by Design of Experiments

Papadakis, Klaus LU ; Odenbrand, Ingemar LU ; Sjoblom, J. and Creaser, D. (2007) In Applied Catalysis B: Environmental 70(1-4). p.215-225
Abstract
A dosing strategy for the transient control of an exhaust after-treatment system using the NOx storage and reduction approach was developed on a heavy-duty diesel engine rig equipped with an I I I diesel engine. The catalysts were oxidation catalysts of 8.41 and NOx storage and reduction catalysts of 16.8 1 total volume. The dosing strategy has been tested in a European Transient Cycle (ETC) resulting in a NOx reduction of 60% (by 4.5 g/kWh) with a fuel penalty of 6.6% when the catalysts were preconditioned to 450 degrees C. The reducing agent was diesel fuel. To keep the fuel penalty low, a bypass system was used which bypassed approximately 90% of the exhaust flow under the regeneration periods. The parameters for the dosing strategy... (More)
A dosing strategy for the transient control of an exhaust after-treatment system using the NOx storage and reduction approach was developed on a heavy-duty diesel engine rig equipped with an I I I diesel engine. The catalysts were oxidation catalysts of 8.41 and NOx storage and reduction catalysts of 16.8 1 total volume. The dosing strategy has been tested in a European Transient Cycle (ETC) resulting in a NOx reduction of 60% (by 4.5 g/kWh) with a fuel penalty of 6.6% when the catalysts were preconditioned to 450 degrees C. The reducing agent was diesel fuel. To keep the fuel penalty low, a bypass system was used which bypassed approximately 90% of the exhaust flow under the regeneration periods. The parameters for the dosing strategy were obtained from steady-state optimization experiments (constant speed and torque) using Design of Experiments (DOE) to obtain much information from few experiments. The system was optimized for a high degree of NOx reduction with a low fuel penalty. The period when the flow through the catalyst is reduced (bypass time), the cycle time, the injection time and rate are important parameters to achieve an improved NOx reduction. The optimal values of these parameters varied with the load points used. The steady-state NOx conversion was approximately 60% (3.3-4.1 g/kWh) at catalyst temperatures between 330 and 530 degrees C. The most promising parameters for a large NOx reduction and a low fuel penalty have been applied in the dosing strategy and tested in an ETC. (c) 2006 Elsevier B.V. All rights reserved. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
fuel penalty, injection parameters, NSR, reduction, NOx storage and, DoE, experimental design, design of experiments, bypass, system, optimization, dosing strategy
in
Applied Catalysis B: Environmental
volume
70
issue
1-4
pages
215 - 225
publisher
Elsevier
external identifiers
  • wos:000243857900026
  • scopus:33845640616
ISSN
0926-3373
DOI
10.1016/j.apcatb.2005.10.033
language
English
LU publication?
yes
id
10100941-30ce-478b-8c16-c2e085d0c86e (old id 676451)
date added to LUP
2007-12-19 12:11:45
date last changed
2017-09-10 04:41:27
@article{10100941-30ce-478b-8c16-c2e085d0c86e,
  abstract     = {A dosing strategy for the transient control of an exhaust after-treatment system using the NOx storage and reduction approach was developed on a heavy-duty diesel engine rig equipped with an I I I diesel engine. The catalysts were oxidation catalysts of 8.41 and NOx storage and reduction catalysts of 16.8 1 total volume. The dosing strategy has been tested in a European Transient Cycle (ETC) resulting in a NOx reduction of 60% (by 4.5 g/kWh) with a fuel penalty of 6.6% when the catalysts were preconditioned to 450 degrees C. The reducing agent was diesel fuel. To keep the fuel penalty low, a bypass system was used which bypassed approximately 90% of the exhaust flow under the regeneration periods. The parameters for the dosing strategy were obtained from steady-state optimization experiments (constant speed and torque) using Design of Experiments (DOE) to obtain much information from few experiments. The system was optimized for a high degree of NOx reduction with a low fuel penalty. The period when the flow through the catalyst is reduced (bypass time), the cycle time, the injection time and rate are important parameters to achieve an improved NOx reduction. The optimal values of these parameters varied with the load points used. The steady-state NOx conversion was approximately 60% (3.3-4.1 g/kWh) at catalyst temperatures between 330 and 530 degrees C. The most promising parameters for a large NOx reduction and a low fuel penalty have been applied in the dosing strategy and tested in an ETC. (c) 2006 Elsevier B.V. All rights reserved.},
  author       = {Papadakis, Klaus and Odenbrand, Ingemar and Sjoblom, J. and Creaser, D.},
  issn         = {0926-3373},
  keyword      = {fuel penalty,injection parameters,NSR,reduction,NOx storage and,DoE,experimental design,design of experiments,bypass,system,optimization,dosing strategy},
  language     = {eng},
  number       = {1-4},
  pages        = {215--225},
  publisher    = {Elsevier},
  series       = {Applied Catalysis B: Environmental},
  title        = {Development of a dosing strategy for a heavy-duty diesel exhaust cleaning system based on NOx storage and reduction technology by Design of Experiments},
  url          = {http://dx.doi.org/10.1016/j.apcatb.2005.10.033},
  volume       = {70},
  year         = {2007},
}