Simulation of low temperature combustion mechanism of different combustion-supporting agents in close-coupled DOC and DPF system |
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| Affiliation: | 1. State Key Laboratory of Engines, Tianjin University, Tianjin 300072, China;2. Tianjin Electronic Information College, Tianjin 300350, China;1. Department of Mechanical Engineering, Politecnico di Milano, 20156 Milan, Italy;2. School of Transportation Science and Engineering, Beihang University, Beijing 100191 China;3. Institute for automatic control and complex systems, University of Duisburg-Essen, Germany |
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| Abstract: | In the coupled Diesel Oxidation Catalyst (DOC) and Diesel Particular Filter (DPF) system, soot cannot be completely removed by only using the passive regeneration. And DPF active regeneration is necessary. The research method in this paper is to spray different kinds of combustion-supporting agents to the DOC in the front of the DPF. Therefore, the low temperature combustion mechanism of different kinds of combustion-supporting agents in DOC was studied, in order to grasp the law of combustion in DOC, and the influence of follow-up emission on DPF removal of soot. During the study, CH4 H2 mixture and diesel (n-heptane + toluene) were used as combustion-supporting agents respectively. The simplified mechanisms of two kinds of gas mixtures used as the combustion-supporting agents in DPF have been constructed and testified in the paper. In this paper, the combustion and emission conditions of the two combustion-supporting agents were analyzed so as to meet the practical requirements of different working conditions. |
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| Keywords: | Diesel DOC+DPF Simulated calculation Reaction mechanism Combustion-supporting agent |
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