Numerical Study on Effects of Key Factors on Performance of CeO 2 -based Catalyzed Diesel Particulate Filter
- PDF / 2,149,043 Bytes
- 12 Pages / 595.22 x 842 pts (A4) Page_size
- 30 Downloads / 137 Views
19-https://doi.org/10.1007/s11630-020-1338-7
Article ID: 1003-2169(2020)00-0000-00
Numerical Study on Effects of Key Factors on Performance of CeO2-based Catalyzed Diesel Particulate Filter WU Gang1,2, LI Zonglin1, ABUBAKAR Shitu3, LI Yuelin1, LI Yuqiang4,* 1. College of Automotive and Mechanical Engineering, Changsha University of Science and Technology, Changsha 410114, China 2. Key Laboratory of Advanced Manufacture Technology for Automobile Parts (Chongqing University of Technology), Ministry of Education, Chongqing 400054, China 3. College of Mechanical and Electrical Engineering, Central South University, Changsha 410083, China 4. School of Energy Science and Engineering, Central South University, Changsha 410083, China © Science Press, Institute of Engineering Thermophysics, CAS and Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract: Catalyzed diesel particulate filter (CDPF) combines the functions of the oxidization catalyst and the diesel particulate filter. Due to good redox capacity and oxygen storage capacity, CeO2 is used as the catalyst of CDPF. Since the effects of key factors on the performance of CeO2-based CDPF were rarely reported, it was performed in this study based on a zero-dimensional numerical model using plug flow reactor in which a reaction mechanism was established and validated by the experiment of the thermal gravimetric analyzer. The effects of exhaust gas temperature and three defined parameters including the ratios of NO2 in NOx (α), NOx to soot (β), and catalyst coated amount to carbon loading amount (γ) on catalyst poisoning temperature, N2O concentration, NOx reduction rate and soot regeneration rate were investigated. The results show that the rising exhaust gas temperature causes the reduction of NOx concentration, and the NOx reduction rate comes to 66% when the catalyst poisoning temperature is reached. The soot regeneration rate and the N2O concentration first increase and then decrease as the exhaust gas temperature increases. Meanwhile, the higher exhaust gas temperature suppresses the production of N2O, but raises the possibility of catalyst poisoning. The increasing α and β result in the increase of soot regeneration rate and the decrease of NOx reduction rate. The catalyst poisoning temperature is improved at higher α and lower β. The soot regeneration rate has a fast increase with γ at first and then stabilizes rapidly. The results of this study are valuable to optimize the operation of CDPF.
Keywords: catalyzed diesel particulate filter, CeO2, NOx, soot, catalyst poisoning temperature
1. Introduction Diesel engine has been widely used as a general power source in various fields due to its high efficiency,
economy, and reliability [1, 2]. However, pollution emissions from diesel engines have caused many health and social problems [3, 4]. Particulate matter (PM) and oxides of Nitrogen (NO x ) are the main emissions
Article type: Contributed by the 1st International Conference of Thermal Fluid Dynamics and Control (August 02–06, 2019, in Christchurc
Data Loading...
