Numerical Study on Effects of Key Factors on Performance of Ce02-based Catalyzed Diesel Particulate Filter

作     者：WU Gang LI Zonglin ABUBAKAR Shitu LI Yuelin LI Yuqiang WU Gang;LI Zonglin;ABUBAKAR Shitu;LI Yuelin;LI Yuqiang

作者机构：College of Automotive and Mechanical EngineeringChangsha University of Science and TechnologyChangsha 410114China Key Laboratory of Advanced Manufacture Technology for Automobile Parts(Chongqing University of Technology)Ministry of EducationChongqing 400054China College of Mechanical and Electrical EngineeringCentral South UniversityChangsha 410083China School of Energy Science and EngineeringCentral South UniversityChangsha 410083China 

出 版 物：《Journal of Thermal Science》 (热科学学报（英文版）)

年 卷 期：2020年第29卷第6期

页      面：1398-1409页

核心收录：

学科分类：080703[工学-动力机械及工程] 08[工学] 0807[工学-动力工程及工程热物理] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：This work is supported by National Natural Science Foundation of China(Grant No.51976016 and 51806250) We also thank to the support by Open Research Subject of State Key Laboratory of Engines,China(Grant No.K2018-07) Open Research Subject of Key Laboratory of Advanced Manufacture Technology for Automobile Parts(Grant No.2017KLMT02,Chongqing University of Technology). 

主　　题：catalyzed diesel particulate filter CeO2 NOx soot catalyst poisoning temperature 

摘      要：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 Ce02-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 NO,(α),NOx to soot(β),and catalyst coated amount to carbon loading amount(y)on catalyst poisoning temperature,N20 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 a and p result in the increase of soot regeneration rate and the decrease of NOx reduction rate.The catalyst poisoning temperature is improved at higher a and lower p.The soot regeneration rate has a fast increase with y at first and then stabilizes rapidly.The results of this study are valuable to optimize the operation of CDPF.