FCC油浆富芳烃抽出油组成分析  

Composition analysis of aromatics-rich extraction oil from FCC slurry

作　　者：冯祎 孙昱东[1] 张帅 FENG Yi;SUN Yu-dong;ZHANG Shuai(College of Chemical Engineering,China University of Petroleum,Qingdao 266580,China)

机构地区：[1]中国石油大学(华东)化学工程学院,山东青岛266580

出　　处：《燃料化学学报》2021年第6期766-770,共5页Journal of Fuel Chemistry and Technology

摘　　要：以中间基属FCC油浆的抽出油为原料,采用实沸点减压蒸馏切割为每20℃一个窄馏分,测量其密度、残炭和运动黏度等基本物性,并结合元素分析、核磁共振波谱以及全二维气相色谱/飞行时间质谱等考察了窄馏分中芳烃组成和结构的变化。结果表明,随着沸点升高,窄馏分的密度、残炭、运动黏度均呈现递增趋势,沸点达420℃后变化尤为明显;440℃之前窄馏分中的芳烃主要以三、四环为主,其后五环芳烃含量急剧增加。FCC油浆中的芳烃具有较高的缩合度且芳环上仅含有少量较短的烷基侧链;油浆窄馏分中的杂原子化合物主要以硫化物和氧化物为主,氮化物和卤化物含量较低。The extracted oil of intermediate base FCC slurry is split into eight narrow fractions with a boiling point interval of 20℃ by vacuum distillation.The aromatic composition and constitution of these narrow fractions were determined by measuring their density,carbon residue and kinematic viscosity as well as elemental analysis,1H and ^(13)C nuclear magnetic resonance(NMR)spectroscopy and comprehensive two-dimensional gas chromatography and time-of-flight mass spectrometry(GC×GC TOF MS).The results indicate that the density,carbon residue and kinematic viscosity of each narrow fraction increase with the increase of boiling point,in particular with a boiling point higher than 420℃.The aromatics consist of mainly tricyclic and tetracyclic aryl hydrocarbons in the narrow fractions with a boiling point lower than 440℃;the content of pentacyclic aromatics increases rapidly with the increace of boling point over 440℃,though the pentacyclic aromatics are also present in the narrow fractions with a boiling point of 400–420℃.The aromatics in the FCC slurry are highly-condensed and contain a small amount of short-alkyl groups.The heteratomic compounds in the narrow fractions include mainly sulfur-and oxygen-containing compounds,whereas the content of nitrogen-and halogen-containing compounds is very low.

关 键 词：FCC油浆 组成分析 窄馏分 物性 芳烃组成 杂原子化合物 

分 类 号：TE624.5[石油与天然气工程—油气加工工程]