Experimental study on the parameter optimization and application of a packed-bed dielectric barrier discharge reactor in diesel particulate filter regeneration  

作　　者：Yunxi SHI Yirui LU Yixi CAI Yong HE Yin ZHOU Yi CHEN Huarong QIU 施蕴曦;卢奕睿;蔡忆昔;何勇;周银;陈祎;邱华荣(School of Automotive and Traffic Engineering,Jiangsu University,Zhenjiang 212013,People's Republic of China;Vehicle Measurement,Control and Safety Key Laboratory of Sichuan Province,School of Automobile and Transportation,Xihua University,Chengdu 610039,People's Republic of China)

机构地区：[1]School of Automotive and Traffic Engineering,Jiangsu University,Zhenjiang 212013,People's Republic of China [2]Vehicle Measurement,Control and Safety Key Laboratory of Sichuan Province,School of Automobile and Transportation,Xihua University,Chengdu 610039,People's Republic of China

出　　处：《Plasma Science and Technology》2021年第11期128-138,共11页等离子体科学和技术（英文版）

基　　金：supported by National Natural Science Foundation of China (No. 51806085);China Postdoctoral Science Foundation (No. 2018M642175);Jiangsu Planned Projects for Postdoctoral Research Fund (No. 2018K101C);Open Research Subject of Key Laboratory of Automotive Measurement, Control and Safety (Xihua University) (No. QCCK2021-007);the Graduate Student Innovation Fund Project of Jiangsu Province (No. KYCX21_3354)

摘　　要：To compensate for the shortcomings of the thermal and catalytic regeneration of the diesel particulate filter(DPF),a self-designed packed-bed dielectric barrier discharge(DBD)reactor for DPF regeneration was developed.The DBD reactor with the main active substance of nonthermal plasma(NTP)as the target parameter was optimized by adjusting the feed gas,packing particles(material or size),and cooling water temperature.Moreover,a set of optimal working parameters(gas source,O_2;packing particles,1.2–1.4 mm ZrO_(2);and cooling water temperature,20℃)was selected to evaluate the effect of different O_(3) concentrations on DPF regeneration.The research results showed that selecting packing particles with high dielectric constant and large particles,as well as reducing the cooling water temperature,with oxygen as the feed gas,contributed to an increase in O_(3) concentration.During DPF regeneration,the following changes were observed:the power of the NTP reactor decreased to lower than 100 W,the O_(3) concentration increased from 15 g m^(-3) to 45 g m^(-3),the CO and CO_2 volume fractions of the particulate matter decomposition products increased,and the peak regeneration temperature increased to 173.4℃.The peak temperature arrival time was 60 min earlier,indicating that the regeneration rate of DPF increased with the increase in O_(3) concentration.However,the O_(3) utilization rate(the amount of carbon deposit removed per unit volume O_(3))initially increased and then decreased;when the O_(3) concentration was set to 25 g m^(-3),the highest O_(3) utilization rate was reached.The packed-bed DBD technology contributed to the increase in the concentration of NTP active substances and the regeneration efficiency of DPF.It provides a theoretical and experimental basis for high-efficiency regeneration of DPF at low temperatures(<200℃).

关 键 词：dielectric barrier discharge packing particles OZONE diesel particulate filter nonthermal plasma 

分 类 号：TK421.5[动力工程及工程热物理—动力机械及工程]