Analysis of hydrocarbons and sulfur compounds in two FCC decant oils and their carbonization products

Rose M. Filley, Semih Eser

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

Two decant oils (DO A and DO B) which produce coke with different optical textures were quantitatively analyzed before and at several stages of carbonization. The differences observed in mesophase development and sulfur incorporation in the semicokes were related to differences in the molecular composition of the two decant oils, including hydrocarbons and sulfur compounds. The analysis of the GC-amenable fractions of the decant oils showed that DO A contains an abundance of pyrene and substituted pyrenes, while DO B is dominated by high concentrations of polymethylphenanthrenes. In general, DO B has a much higher proportion of alkyl-substituted PAHs and a higher concentration of n-alkanes. The presence of more reactive hydrocarbons in DO B is considered to be responsible for the inferior texture development and rapid incorporation of sulfur in the semicoke. Extensive methylation/demethylation reactions appear to occur during the early stages of carbonization; the role of these reactions in mesophase development and sulfur incorporation is addressed further in the companion papers.

Original languageEnglish (US)
Pages (from-to)623-629
Number of pages7
JournalEnergy and Fuels
Volume11
Issue number3
StatePublished - May 1 1997

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Sulfur Compounds
Sulfur compounds
Carbonization
Hydrocarbons
Sulfur
Oils
Pyrene
Pyrenes
Textures
Alkanes
Methylation
Polycyclic aromatic hydrocarbons
Coke
Paraffins
Chemical analysis

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Fuel Technology
  • Energy Engineering and Power Technology

Cite this

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abstract = "Two decant oils (DO A and DO B) which produce coke with different optical textures were quantitatively analyzed before and at several stages of carbonization. The differences observed in mesophase development and sulfur incorporation in the semicokes were related to differences in the molecular composition of the two decant oils, including hydrocarbons and sulfur compounds. The analysis of the GC-amenable fractions of the decant oils showed that DO A contains an abundance of pyrene and substituted pyrenes, while DO B is dominated by high concentrations of polymethylphenanthrenes. In general, DO B has a much higher proportion of alkyl-substituted PAHs and a higher concentration of n-alkanes. The presence of more reactive hydrocarbons in DO B is considered to be responsible for the inferior texture development and rapid incorporation of sulfur in the semicoke. Extensive methylation/demethylation reactions appear to occur during the early stages of carbonization; the role of these reactions in mesophase development and sulfur incorporation is addressed further in the companion papers.",
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Analysis of hydrocarbons and sulfur compounds in two FCC decant oils and their carbonization products. / Filley, Rose M.; Eser, Semih.

In: Energy and Fuels, Vol. 11, No. 3, 01.05.1997, p. 623-629.

Research output: Contribution to journalArticle

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