摘要
在一台国-Ⅲ柴油机上,燃用G5、D1、D2、D3、和D4五种芳烃含量不同的柴油,对不同负荷下的排放特性进行了研究。利用PUF泡沫和聚四氟氯乙烯纤维滤膜串联法采集柴油机尾气中的气相和颗粒固相多环芳烃(PAHs),并采用气相色谱-质谱联用仪进行分析,重点研究了PAHs的排放特征。结果表明:燃用不同柴油时柴油机PM排放随负荷增加呈现先降后增的趋势。PAHs排放以气相为主,占总PAHs含量的90%以上,颗粒固相PAHs则低于10%;在柴油燃烧排放的总PAHs中萘和甲基萘含量最高,且不同油品燃烧排放的PAHs排放状况与油品中PAHs自身含量密切相关。不同柴油燃烧排放的气相PAHs均以2环和3环为主,而颗粒固相PAHs则以3环和4环为主。
Emission characteristics of a China State III diesel engine fueled with five diesel fuels of different AH contents, G5, D1, D2, D3 and D4, were analyzed in various load conditions. PAHs of gaseous phase and particle state were respectively trapped with serial foamed PUF and PTFE fiber filter, and analyzed by GC-MS, especially examining the PAHs emission. Results show that particulate matter （PM） emissions of all diesel fuels exhibit decrease-increase trend with load increase, finally reach max. values at full load. The PAHs emissions exist mainly in gaseous phase, more than 90% of the total. The rest in PM state is less than 10%. Majority of total PAHs is naphthalene and methylnaphthalene, and the PAHs emissions of each fuel depend on its PAHs content. The emitted gaseous phase PAHs are mainly of 2 and 3 benzene rings, and the PM state PAHs mainly of 3 and 4 benzene rings.
出处
《内燃机工程》
EI
CAS
CSCD
北大核心
2015年第2期25-29,37,共6页
Chinese Internal Combustion Engine Engineering
作者简介
张仲荣（1979-），女，工程师，硕士，主要研究方向为汽车尾气排放分析，E-mail：zhangzhr1999@126．com。
