Effects of continuously regenerating diesel particulate filters on regulated emissions and number-size distribution of particles emitted from a diesel engine

查看全文 作　　者：Zhihua [1,2]Liu;Asad Naeem [1,3]Shah;Yunshan [1]Ge;Yan [4]Ding,;Jianwei [1]Tan;Lei [1]Jiang;Linxiao [1]Yu;Wei [1]Zhao;Chu [1]Wang;Tao [1]Zeng

机构地区：[1]School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China. E-mail: liuzhihual61 @163.com;[2]Bourns College of Engineering, Center for Environmental Research and Technology, and Department of Chemical and Environmental Engineering University of California, Riverside, CA 92507, USA;[3]Department of Mechanical Engineering, University of Engineering and Technology, Lahore 54000, Pakistan;[4]Chinese Research Academy of Environmental Sciences, Beijing 100012, China

出　　处：《Journal of Environmental Sciences》索引2011年第23卷第5期,共10页

基　　金：supported by the National Natural Science Foundation of China (No. 40805053) 摘　　要：The effects of continuously regenerating diesel particulate filter (CRDPF) systems on regulated gaseous emissions, and number-size distribution and mass of particles emanated from a diesel engine have been investigated in this study. Two CRDPF units (CRDPF-1 and CRDPF-2) with different specifications were separately retrofitted to the engine running with European steady-state cycle (ESC). An electrical low pressure impactor (ELPI) was used for particle number-size distribution measurement and mass estimation. The conversion/reduction rate (R CR ) of hydrocarbons (HC) and carbon monoxide (CO) across CRDPF-1 was 83% and 96.3%, respectively. Similarly, the R CR of HC and CO and across CRDPF-2 was 91.8% and 99.1%, respectively. The number concentration of particles and their concentration peaks; nuclei mode, accumulation mode and total particles; and particle mass were highly reduced with the CRDPF units. The nuclei mode particles at downstream of CRDPF-1 and CRDPF-2 decreased by 99.9% to 100% and 97.8% to 99.8% respectively; and the particle mass reduced by 73% to 92.2% and 35.3% to 72.4%, respectively, depending on the engine conditions. In addition, nuclei mode particles increased with the increasing of engine speed due to the heterogeneous nucleation initiated by the higher exhaust temperature, while accumulation mode particles were higher at higher loads due to the decrease in the air-to-fuel ratio (A/F) at higher loads. 关键词：颗粒大小分布柴油发动机发动机排放微粒过滤器再生排放量质量估计和数

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Effects of continuously regenerating diesel particulate filters on regulated emissions and number-size distribution of particles emitted from a diesel engine

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