Soot deposition effects and microwave regeneration modelling of diesel particulate filtration system |
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| Affiliation: | 1. Department of Mechanical Engineering, University of Petroleum and Energy Studies, Dehradun, 248007, India;2. Department of Aerospace Engineering, University of Petroleum and Energy Studies, Dehradun, 248007, India;1. College of Mechanical and Vehicle Engineering, Hunan University, Changsha 410082, China;2. College of Mechanical Engineering, Xiangtan University, Xiangtan 411105, China;3. Institute of New Energy and Energy-Saving & Emission-Reduction Technology, Hunan University, Changsha 410082, China;1. Key Laboratory of Fluid and Power Machinery, Ministry of Education, School of Energy and Power Engineering, Xihua University, Chengdu, 610039, PR China;2. Vehicle Measurement, Control and Safety Key Laboratory of Sichuan Province, School of Automobile and Transportation, Xihua University, Chengdu, 610039, PR China;3. College of Civil Aviation Safety Engineering, Civil Aviation Flight University of China, Guanghan, 618307, China;4. Department of Mechanical Engineering Sciences, University of Surrey, Guildford, Surrey, GU2 7XH, UK;1. State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body, Hunan University, Changsha 410082, China;2. College of Mechanical and Vehicle Engineering, Hunan University, Changsha 410082, China;3. Institute of New Energy and Energy-Saving & Emission-Reduction Technology, Hunan University, Changsha 410082, China;4. Mechanical and Mechatronics Engineering, University of Waterloo, Waterloo N2L 3G1, Canada |
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| Abstract: | Regeneration of accumulated soot particles in the substrate walls of the diesel particulate filtration system is one of the major challenges faced by the automotive industry. This study investigated the conversion efficiency and filtration behaviour of the after treatment system comprising of diesel oxidation catalysis (DOC) and diesel particulate filtration (DPF) system. The average conversion efficiency of hydrocarbons was close to 54% and filtration efficiency of the particle number emissions was around 92%. Characterization of the DOC and DPF substrate were conducted using microscopic imaging, Fourier transform infrared spectroscopy (FTIR) and particle size analysis (PSA). The results of FTIR study indicated the presence of carcinogenic agents trapped in the porous walls of the filter substrate. A model for microwave based regeneration system is proposed in this article and CFD analysis were conducted to determine the temperature and electric field distribution in the DPF substrate for a regeneration time of 180 s. Results of simulation showed that the microwave radiations raise the temperature close to soot oxidation temperature (873 K), ensuring effective regeneration. |
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| Keywords: | Diesel particulate filtration Emissions Nucleation Regeneration Soot |
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