全二维气相色谱-飞行时间质谱表征喷气燃料和生物航煤详细烃组成

Detailed Hydrocarbon Composition Analysis for Fossil Jet Fuel and Bio-Jet Fuel With Two-Dimensional Gas Chromatography and Time of Flight Mass Spectrometry

采用全二维气相色谱-飞行时间质谱(GC×GC-TOFMS)和全二维气相色谱-氢火焰离子化检测器(GC×GC-FID)构建石油基喷气燃料(简称喷气燃料)和生物基航空煤油(简称生物航煤)烃类分子水平表征方法。该方法利用GC×GC-TOFMS的族分离特性和瓦片效应对喷气燃料和生物航煤的烷烃、环烷烃和芳烃等组分进行定性分析和碳数分布规律研究,将族分类信息由GC×GC-TOFMS转移至GC×GC-FID,并利用保留时间关联方程校正后进行定量。考察了不同来源喷气燃料和生物航煤的烃组成和碳数分布特点。结果表明,喷气燃料和生物航煤的芳烃和异构烷烃含量差异很大,不同来源的喷气燃料和生物航煤碳数分布有很大不同。

A new method for detailed hydrocarbon analysis(DHA)in jet fuels was established with the two-dimensional gas chromatography and time of flight mass spectrometry(GC×GC-TOFMS),and comprehensive two-dimensional gas chromatography-hydrogen flame ionization detector(GC×GC-FID).The proposed method utilized group separation characteristics and tile effect of GC×GC to perform both qualitative analysis and carbon distribution studies on paraffin,naphthene and aromatics of fossil jet fuels and bio-jet fuels.Quantitative results have been obtained after transferring group classification information from GC×GC-TOFMS to GC×GC-FID and a set of retention time correlation equations.Experimental results suggested that there were significant differences for DHA composition between fossil jet fuels and bio-jet fuels,especially for aromatics and iso-paraffins.In addition,it was also found that carbon number distribution was also very different for fossil jet fuels and bio-jet fuels from different sources even though they might be in the same quality classification.