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Analysis of transient thermal and conversion characteristics of catalytic converters during warm-up
Institution:1. Mechanical Division I. Toyota Central Research & Development Labs., Inc., Nagakute Yokomichi 41-1, Nagakute-cho, Aichi, 480-11, Japan;2. Higashifuji Research Labs., Toyota Motor Corporation, Mishuku 1200, Susono-shi. Shizuoka, 411-10, Japan;1. Institute of Forensic Medicine and Toxicology, First Faculty of Medicine, Charles University and General University Hospital in Prague, 121 08 Prague 2, Czech Republic;2. Department of Analytical Chemistry, Faculty of Science, Charles University, Albertov 6, 128 43 Prague 2, Czech Republic;3. National Institute of Mental Health, Topolová 748, 250 67 Klecany, Czech Republic;4. Department of Physiology, Faculty of Science, Charles University, Albertov 6, 128 43 Prague 2, Czech Republic;5. Faculty of Food and Biochemical Technology, University of Chemistry and Technology Prague, Technická 5, 166 28 Prague 6, Czech Republic;6. 3rd Faculty of Medicine, Charles University, Ruská 87, 100 00 Prague 10, Czech Republic;1. School of Mechanical and Automotive Engineering, Guangxi University of Science and Technology, Liuzhou, 545006, China;2. Liuzhou Key Laboratory of Automobile Exhaust Control Technology, Guangxi University of Science and Technology, Liuzhou, 545006, China;3. Guangxi Earthmoving Machinery Collaborative Innovation Center, Liuzhou, 545006, China;4. Research and Development Department, Faurecia (Liuzhou) Emissions Control Technologies Co., Ltd., Liuzhou, 545000, China
Abstract:Transient thermal and conversion characteristics of catalytic converters during warm-up were numerically simulated. The following observations were obtained and verified experimentally. There is great maldistribution of concentrations inside a catalytic converter during warm-up. CO and THC have high concentrations in the exhaust gas passing through outer region cells because they are not converted due to low wall temperature. Reduction rates of CO and THC concentrations in each cell are higher than those of the total mean concentrations in the exhaust gas passing through the converters.
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