FT-i.r. characterization of pitches derived from Avgamasya asphaltite and Raman-Dinçer heavy crude

Pitches were prepared by three methods from Avgamasya asphaltite: (1) solvent extraction; (2) pyrolysis followed by vacuum distillation of the resulting tar; (3) air blowing of some of the vacuum-distilled tars. For Raman-Dinçer heavy crude oil, only vacuum distillation was used. The chemical change...

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Bibliographic Details
Published in:Fuel (Guildford) 1997-11, Vol.76 (14), p.1389-1394
Main Authors: Akrami, H.A., Yardim, M.F., Akar, A., Ekinci, E.
Format: Article
Language:English
Subjects:
Applied sciences
asphaltite pitch
chemical structure
Crude oil, natural gas and petroleum products
Energy
Exact sciences and technology
FT-i.r
Fuels
petroleum pitch
pitch preparation
Processing of crude oil and oils from shales and tar sands. Processes. Equipment. Refinery and treatment units
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Summary:Pitches were prepared by three methods from Avgamasya asphaltite: (1) solvent extraction; (2) pyrolysis followed by vacuum distillation of the resulting tar; (3) air blowing of some of the vacuum-distilled tars. For Raman-Dinçer heavy crude oil, only vacuum distillation was used. The chemical changes due to the different processes were studied by Fourier-transform infrared spectroscopy, softening point measurement and elemental analysis. Vacuum distillation and air blowing markedly increased the softening point, promoted dehydrogenation and aromatization through significant reduction of aliphatic structures and reduced the H C atomic ratio. The formation of oxygenated compounds is the major feature of the air blowing technique. The aromaticity and the softening point of solvent-extracted pitches depended on the effectiveness of the solvent.
ISSN:0016-2361
1873-7153
DOI:10.1016/S0016-2361(97)00100-2