Coke production from an FCC-decant oil: characterization of the thermal process

Detailed characterization of the thermal transformation of a decant oil, obtained from a fluid catalytic cracking (FCC), in a closed system makes it possible to determine the mode and timing of coke production. A fast dismutation process into light and heavy liquid products is observed, followed by...

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Bibliographic Details
Published in:Fuel (Guildford) 1994, Vol.73 (8), p.1284-1290
Main Authors: Fixari, Bernard, Belloir, Pierre, Le Perchec, Pierre
Format: Article
Language:English
Subjects:
cant oil
coke
pyrolysis
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Summary:Detailed characterization of the thermal transformation of a decant oil, obtained from a fluid catalytic cracking (FCC), in a closed system makes it possible to determine the mode and timing of coke production. A fast dismutation process into light and heavy liquid products is observed, followed by slow production of coke with an activation energy of only 150 kJ mol −1. From elemental analysis, nuclear magnetic resonance (n.m.r.) and mass spectra, dehydrogenation and condensation reactions are detected. These results are well modelled by the pyrolysis of a set of 1-aryl, 2-phenylethylene compounds (aryl = two to four aromatic rings) under the same conditions. The phenanthrenic derivative presents a similar thermal profile towards coke production. The first steps are mainly dominated by non-radical processes such as electrocyclic reactions.
ISSN:0016-2361
1873-7153
DOI:10.1016/0016-2361(94)90303-4