Characterization of pitches by solid state nuclear magnetic resonance

Solid petroleum, ethylene-cracker, and coal tar pitches were characterized by 13C cross-polarizationmagic-angle-spinning nuclear magnetic resonance spectroscopy (CP/MAS n.m.r.) and by dipolar dephasing. The relative numbers of carbon atoms were determined by peak synthesis of the dipolar dephased (D...

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Bibliographic Details
Published in:Fuel (Guildford) 1989-11, Vol.68 (11), p.1490-1492
Main Authors: Grint, Alan, Proud, Graeme P., Poplett, Iain J.F., Bartle, Keith D., Wallace, Stephen, Matthews, Raymond S.
Format: Article
Language:English
Subjects:
Applied sciences
carbon-13 n.m.r
Coal and petroleum industry by products processing
Energy
Exact sciences and technology
Fuel processing. Carbochemistry and petrochemistry
Fuels
n.m.r
pitch
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Summary:Solid petroleum, ethylene-cracker, and coal tar pitches were characterized by 13C cross-polarizationmagic-angle-spinning nuclear magnetic resonance spectroscopy (CP/MAS n.m.r.) and by dipolar dephasing. The relative numbers of carbon atoms were determined by peak synthesis of the dipolar dephased (DD) spectrum and of the difference spectrum between the CP/MAS and DD spectra. Spectra and derived structural information obtained in this way were in good agreement with high-resolution n.m.r. spectra of pitch in solution. Solid state n.m.r. is shown to be an attractive alternative to the recording of spectra of pitches in reactive solvents.
ISSN:0016-2361
1873-7153
DOI:10.1016/0016-2361(89)90051-3