CAJ | 학술논문

利用气相色谱-飞行时间质谱联用仪（GC-TOFMS）建立了测定柴油烃类分子组成的馏程分布的方法，可以得到柴油样品中各种类型烃类在不同馏程段的碳数分布与平均相对分子质量。利用所建方法研究了柴油中各种类型烃类平均分子结构随馏程的变化情况，发现柴油不同馏程段的平均相对分子质量与其芳烃含量和烃类异构化程度有关：芳烃含量越低、烃类异构化程度越高，该馏程段的平均相对分子质量越高。考察了柴油加氢精制前后烃类分子组成的馏程分布变化情况，柴油经加氢精制后，饱和烃的馏程分布基本不变，只是含量有所增加，芳烃的馏程分布在低馏分段没有变化，在高馏分段含量下降，导致产物的平均相对分子质量在高馏分段高于原料的平均相对分子质量。
이용기상색보-비행시간질보련용의（GC-TOFMS）건립료측정시유경류분자조성적류정분포적방법，가이득도시유양품중각충류형경류재불동류정단적탄수분포여평균상대분자질량。이용소건방법연구료시유중각충류형경류평균분자결구수류정적변화정황，발현시유불동류정단적평균상대분자질량여기방경함량화경류이구화정도유관：방경함량월저、경류이구화정도월고，해류정단적평균상대분자질량월고。고찰료시유가경정제전후경류분자조성적류정분포변화정황，시유경가경정제후，포화경적류정분포기본불변，지시함량유소증가，방경적류정분포재저류분단몰유변화，재고류분단함량하강，도치산물적평균상대분자질량재고류분단고우원료적평균상대분자질량。
A method for analysis of boiling range distribution of hydrocarbon molecular composition in diesel by gas chromatography-time of flight mass spectrometry (GC-TOFMS)was established. Car-bon number distributions,average molecular weights and structures of hydrocarbon in different boiling ranges were studied. It is found that the average molecular weight of distillation range was influenced by aromatic content and degree of isomerization. The lower the aromatic content and the higher the isomer-ization degree is,the higher average molecular weight of the boiling range is. The boiling range distri-butions of hydrocarbon molecular compositions in diesel before and after hydrotreating were investiga-ted. For hydrotreated diesel,boiling range distribution of saturated hydrocarbon is basically unchanged, but its concentration increases. Boiling range distribution of aromatic remains the same in low distillate fraction,whereas there is a concentration decrease in high distillate,which results in a higher average molecular weight of product than that of raw material diesel in high distillate fraction.