摘要
在柴油机排气管状态下 ,采用自行设计的微粒采样装置对十三工况下的排气微粒进行了采样 ,利用气相色谱—质谱联用技术对微粒中可溶性有机组分 (SOF)的成分进行了测定、分析 ;还测定了排气温度对微粒排放质量流量及SOF组分的影响。结果表明 :在排气管采样状态下 ,微粒SOF组分中 80 %左右为正烷烃和支链烷烃 ,碳数从C9～C2 8,余下组分为多环芳香烃 (茚、芴、菲、萘等的同系物 )以及少量其它有机物 ;同一工况下 ,随采样温度升高 ,微粒排放质量流量。
Diesel exhaust particulates were sampled on a specially designed particulates sampling apparatus under normal exhaust temperature.The soluble organic fraction (SOF) was analyzed by gas chromatography/mass spectrometry (GC/MS).The influence of exhaust temperature on particulate fractions was measured.The results showed that under normal exhaust temperature,about 80% of SOF in particulates are alkanes with straight or branch chains,the carbon atoms are from 9 to 28.The rest fractions of SOF are polycyclic aromatic hydrocarbons (homologs of indene,fluorene,phenanthrene,naphthalene etc.) and other organic substances.Under the same engine operating condition,both the particulate mass flow and the number of SOF fractions decreased with the increase in sampling temperature.
出处
《内燃机学报》
EI
CAS
CSCD
北大核心
2004年第2期110-115,共6页
Transactions of Csice
基金
山东大学青年基金资助项目 ( 870 3 9)
