【摘要】 采用超声洗脱法,分离出柴油机排气微粒(PM)中的可溶有机组分(SOF)。利用色谱—质谱联用技术对SOF的成分进行了分析。结果表明,SOF中最大的组分为烷烃,其次是芳香烃;烷烃中大部分为直链烷烃,芳香烃以萘族和菲族等多环芳香烃为主。给出了微粒SOF中烷烃和芳香烃等有机成分在不同工况下所占有的比例,以及芳香烃中主要有机组分的百分含量。更多还原

【Abstract】 Soluble organic fraction(SOF)and insoluble organic fraction(IOF) in particulate matter(PM) emission from diesel engine were separated by supersonic elution.SOF in PM was analyzed by combined gas chromatography/mass spectrometry.Experiments were carried out in a sixcylinder, heavyduty diesel engine.The diesel engine is inline,turbocharged and intercooled.The 13mode engine test cycle was performed on the diesel engine.PM emission from the diesel engine under the 13 operating conditions was collected respectively.Analysis results show the dominant component in SOF is paraffin hydrocarbon,secondly,is aromatic hydrocarbon.The majority of paraffin hydrocarbon is normal paraffin hydrocarbon.The dominant fractions of aromatic hydrocarbon are naphthalene and phenanthrene.The relative contents of paraffin hydrocarbon and aromatic hydrocarbon of SOF in PM from the diesel engine are given in this paper,as well as the relative contents of main organic components in aromatic hydrocarbon. 更多还原