Asphaltene Reaction Pathways. 1. Thermolysis

Phillip E. Savage, Michael T. Klein, Simon G. Kukes

Research output: Contribution to journalArticle

85 Citations (Scopus)

Abstract

Petroleum asphaltenes were pyrolyzed at temperatures ranging from 350 to 565 °C for times from 5 to 150 min in batch tubing bomb reactors. Gas, maltene, coke, and unreacted asphaltene product fractions were recovered by using a solvent extraction sequence and were subsequently analyzed by GC and GC/MS. The variation of these products' yields with time and temperature provided insight to asphaltene structure, thermal reaction pathways, and processing schemes. Primary pyrolysis products included light heteroatomic and hydrocarbon gases, alkanes, cycloalkanes, and single-ring aromatics, from which the presence of corresponding moieties in the asphaltene was inferred. The product fractions’ temporal variations were consistent with an asphaltene structure containing a hydrogen-deficient, condensed aromatic core. These temporal variations also allowed discernment of primary and secondary thermal reaction pathways. The primary reaction of the asphaltene to each of its aromatic core and maltene andjgas fractions was followed by secondary degradation of these primary products to lighter compounds. These results suggest that catalyst deactivation during the hydroprocessing of heavy oils can be partially attributed to the precipitation and deposition of asphaltene and its aromatic core.

Original languageEnglish (US)
Pages (from-to)1169-1174
Number of pages6
JournalIndustrial and Engineering Chemistry Process Design and Development
Volume24
Issue number4
DOIs
StatePublished - Jan 1 1985

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Thermolysis
Crude oil
Catalyst deactivation
Asphaltenes
Solvent extraction
Tubing
Gases
Coke
Paraffins
Pyrolysis
Hydrocarbons
Degradation
Hydrogen
Temperature
Processing
Hot Temperature

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)
  • Engineering(all)
  • Industrial and Manufacturing Engineering

Cite this

Savage, Phillip E. ; Klein, Michael T. ; Kukes, Simon G. / Asphaltene Reaction Pathways. 1. Thermolysis. In: Industrial and Engineering Chemistry Process Design and Development. 1985 ; Vol. 24, No. 4. pp. 1169-1174.
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Asphaltene Reaction Pathways. 1. Thermolysis. / Savage, Phillip E.; Klein, Michael T.; Kukes, Simon G.

In: Industrial and Engineering Chemistry Process Design and Development, Vol. 24, No. 4, 01.01.1985, p. 1169-1174.

Research output: Contribution to journalArticle

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