摘要
针对柴油机氧化催化器(diesel oxidation catalyst,DOC)与催化型柴油机颗粒捕集器(catalyst diesel particulate filter,CDPF)组合的后处理系统,研究了在CDPF中沉积灰分对柴油机排气中醛酮污染物类、苯系污染物的影响。研究结果发现,随着沉积灰分的增加,CDPF前苯系污染物排放呈现U形变化趋势,在各个工况下,CDPF后排气中苯系污染物排放量与CDPF前相比均明显升高,苯系污染物各组分的排放量变化程度不同;存在灰分时,CDPF前的醛酮类污染物排放量与新鲜状态相比有明显增加,但CDPF后醛酮类污染物排放量呈明显下降趋势,并且醛酮类污染物物种发生变化。
In terms of diesel oxidation catalyst(DOC)and catalyst diesel particulate filter(CDPF)diesel engine aftertreatment system,the effects of ash deposited in CDPF on the BTEX(Benzene,Toluene,enthylbenzene and xylene)and carbonyl compound emission were studied.Research results indicate that the tendency of the BTEX emission before CDPF with ash is U shaped with the ash accumulation.Meanwhile,the BTEX emission after CDPF with ash increases clearly compared with the BTEX emission before CDPF with ash in different working conditions and the BTEX contents are also changed in different degrees.The total carbonyl compound emission before CDPF with ash increases obviously compared with the CDPF without ash.In addition,the total carbonyl compound emission after CDPF with ash decreases obviously and the carbonyl compounds change a lot in different working conditions compared with the compounds before CDPF with ash.
作者
王浩浩
葛蕴珊
谭建伟
WANG Haohao;GE Yunshan;TAN Jianwei(School of Mechanical Engineering,Beijing Institute of Technology,Beijing 100081,China)
出处
《内燃机工程》
EI
CAS
CSCD
北大核心
2021年第3期81-85,92,共6页
Chinese Internal Combustion Engine Engineering
基金
国家重点研发计划项目(2017YFF0211802)
国家自然科学基金项目(51676017)。
关键词
灰分
柴油颗粒捕集器
非常规排放
ash
diesel particulate filter(DPF)
unregulated emissions
