Composition analysis of aromatics-rich extraction oil from FCC slurry

FENG Yi; SUN Yu-dong; ZHANG Shuai

doi:10.1016/S1872-5813(21)60027-0

Volume 49 Issue 6

Jun. 2021

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FENG Yi, SUN Yu-dong, ZHANG Shuai. Composition analysis of aromatics-rich extraction oil from FCC slurry[J]. Journal of Fuel Chemistry and Technology, 2021, 49(6): 766-770. doi: 10.1016/S1872-5813(21)60027-0

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FENG Yi, SUN Yu-dong, ZHANG Shuai. Composition analysis of aromatics-rich extraction oil from FCC slurry[J]. Journal of Fuel Chemistry and Technology, 2021, 49(6): 766-770. doi: 10.1016/S1872-5813(21)60027-0

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Composition analysis of aromatics-rich extraction oil from FCC slurry

doi: 10.1016/S1872-5813(21)60027-0

College of Chemical Engineering, China University of Petroleum, Qingdao 266580, China

Received Date: 2020-10-21
Rev Recd Date: 2020-12-30

Available Online: 2021-03-30

Publish Date: 2021-06-30

Abstract

Abstract

The extracted oil of intermediate base FCC slurry is split into eight narrow fractions with a boiling point interval of 20 °C 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 ¹³C 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 °C. The aromatics consist of mainly tricyclic and tetracyclic aryl hydrocarbons in the narrow fractions with a boiling point lower than 440 °C; the content of pentacyclic aromatics increases rapidly with the increace of boling point over 440 °C, though the pentacyclic aromatics are also present in the narrow fractions with a boiling point of 400–420 °C. 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.
- FCC slurry,
- composition analysis,
- narrow fraction,
- physical property,
- aromatic hydrocarbon composition,
- heteroatomic compound

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References(15)

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