Experimental study on filtration and continuous regeneration of a particulate filter system for heavy-duty diesel engines  

作　　者：Tao Tang Jun Zhang Dongxiao Cao Shijin Shuai Yanguang Zhao 

机构地区：[1]State Key Laboratory of Automotive Safety and Energy, Tsinghua University

出　　处：《Journal of Environmental Sciences》2014年第12期2434-2439,共6页环境科学学报（英文版）

基　　金：supported by the National High Technology Research and Development Program of China(863)(No.2013AA065304)

摘　　要：This study investigated the filtration and continuous regeneration of a particulate filter system on an engine test bench, consisting of a diesel oxidation catalyst（DOC） and a catalyzed diesel particulate filter（CDPF）. Both the DOC and the CDPF led to a high conversion of NO to NO2 for continuous regeneration. The filtration efficiency on solid particle number（SPN） was close to100%. The post-CDPF particles were mainly in accumulation mode. The downstream SPN was sensitively influenced by the variation of the soot loading. This phenomenon provides a method for determining the balance point temperature by measuring the trend of SPN concentration.This study investigated the filtration and continuous regeneration of a particulate filter system on an engine test bench, consisting of a diesel oxidation catalyst（DOC） and a catalyzed diesel particulate filter（CDPF）. Both the DOC and the CDPF led to a high conversion of NO to NO2 for continuous regeneration. The filtration efficiency on solid particle number（SPN） was close to100%. The post-CDPF particles were mainly in accumulation mode. The downstream SPN was sensitively influenced by the variation of the soot loading. This phenomenon provides a method for determining the balance point temperature by measuring the trend of SPN concentration.

关 键 词：Catalyzed diesel particulate filter Diesel oxidation catalyst FILTRATION REGENERATION Balance point temperature 

分 类 号：X701[环境科学与工程—环境工程]