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Modeling and Numerical Analysis of NOx Storage-Reduction Catalysts - On the Two Effects of Rich-Spike Duration
Technical Paper
2001-01-1297
ISSN: 0148-7191, e-ISSN: 2688-3627
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Sector:
Event:
SAE 2001 World Congress
Language:
English
Abstract
Two effects of rich-spike duration on NOx-storing have been analyzed. The first one, that NOx-storing speed decreases as rich-spike duration increases, is explained as the influence of NOx diffusion in wash-coat layer, which is quantified by a simple mathematical expression for NOx-storing rate. The second one, a peculiar behavior of NOx-storing in appearance of the outlet NOx concentration, is clarified: Heat produced directly or indirectly (via oxygen storage in ceria) by rich-spike warms up the downstream part, which releases excess NOx at the raised temperature. Contributions of the oxygen storage and the carbonate of NOx-storage material are also discussed.
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Authors
- Shinji Kojima - Toyota Central Research and Development Laboratories, Inc.
- Naoki Baba - Toyota Central Research and Development Laboratories, Inc.
- Shin-ichi Matsunaga - Toyota Central Research and Development Laboratories, Inc.
- Kouji Senda - Toyota Motor Corp.
- Kenji Katoh - Toyota Motor Corp.
- Takaaki Itoh - Toyota Motor Corp.
Citation
Kojima, S., Baba, N., Matsunaga, S., Senda, K. et al., "Modeling and Numerical Analysis of NOx Storage-Reduction Catalysts - On the Two Effects of Rich-Spike Duration," SAE Technical Paper 2001-01-1297, 2001, https://doi.org/10.4271/2001-01-1297.Also In
Advanced Catalytic Converters and Substrates for Gasoline Emission Systems
Number: SP-1573; Published: 2001-03-05
Number: SP-1573; Published: 2001-03-05
References
- Asanuma T. Takeshima S. Yamashita T. Tanaka T. Murai T. Iguchi S. “Influence of Sulfur Concentration in Gasoline on NOx Storage-Reduction Catalyst” SAE paper 1999-01-3501
- Ikeda Y. Sobue K. Tsuji S. Matsumoto S. “Development of NOx Storage-Reduction Three-way Catalyst for D-4 Engines” SAE paper 1999-01-1279
- Miyoshi N. Matsumoto S. Katoh K. Tanaka T. Harada J. Takahashi N. Yokota K. Sugiura M. Kasahara K. “Development of New Concept Three-Way Catalyst for Automotive Lean-Burn Engines” SAE paper 950809
- Matsumoto S. Ikeda Y. Suzuki H. Ogai M. Miyoshi N. “NOx storage-reduction catalyst for automotive exhaust with improved tolerance against sulfur poisoning” Applied Catalysis B: Environmental 25 115 124 2000
- Baba N. Ohsawa K. Sugiura S. “Numerical Approach for Improving the Conversion Characteristics of Exhaust Catalysts Under Warming-Up Condition” SAE paper 962076
- Chan S.H. Hoang D.L. “Modeling of Catalytic Conversion of CO/HC In Gasoline Exhaust at Engine Cold-Start” SAE paper 1999-01-0452
- Kojima S. “Numerical Calculation of the Two Dimensional Unsteady Laminar Flame Propagation in a Confined H2/Air System” Combustion and Flame 63 151 163 1986
- Votruba J. Mikus O. Nguen K. Hlavacek V. Skrivanek J. “Heat and Mass Transfer in Honeycomb Catalysts - II” Chem.Eng.Sci. 30 201 206 1975
- Hindmarsh A.C. Lawrence Livermore Labor 1971 1974
- Koltsakis G.C. Konstantinidis P.A. Stamatelos A.M. “Development and application range of mathematical models for 3-way catalytic converters” Applied Catalysis B: Environmental 12 161 191 1997
- The Japan Society of Calorimetry and Thermal Analysis “Thermodynamic Database MALT2” Kagaku Gijutsu-sha Tokyo 1992
- Kobayashi T. Yamada T. Kayano K. “Study of NOx Trap Reaction by Thermodynamic Calculation” SAE paper 970745