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Characterization of high-boiling petroleum distillate fractions by proton and 13C nuclear magnetic resonance spectrometry by Daniel J. O'Donnell; Stan O. Sigle; K.Darrell Berlin; Gene P. Sturm; James W. Vogh is a Engineering article available to read on EtoBox.
What is Characterization of high-boiling petroleum distillate fractions by proton and 13C nuclear magnetic resonance spectrometry about?
High-boiling (535-675"(I) distillate fractionsof Wilmington (Calif. USA) and Gach Saran (Iran) crude oils were separated into saturate, monoaromatic, diaromatic and polyaromatic-polar fractions by passage through a silica-gel-alumina dual packed chromatography column. These fractions were further separated on the basis of molecular volume by gel-permeation chromatography (9.p.c.). Select g.p.c. fractions were then analyzed by 1 H and 13C n.m.r. spectroscopy. The fraction of aromatic carbons (Ar-C) of the total carbon content of a given series of g.p.c. fractions, obtained directly from the 13C n.m.r. spectra, showed a significant range of values (e.g. 13.2% to 29.2%) within each series. Furthermore, the values of %Ar-C within a series of g.p.c. fractions showed a maximum in each case. No such maximum was observed in the 'H n.m.r. spectra for the fraction of aromatic proton (%Ar-H) content compared to the total proton content of any of the g.p.c. fraction series. Signals observed in the 13C n.m.r. spectra confirmed the presence of aliphatic chains attached to aromatic structures in the monoaromatic, diaromatic and polyaromatic-polar 9.p.c. series of each distillate fraction. Welldef
Who reads Characterization of high-boiling petroleum distillate fractions by proton and 13C nuclear magnetic resonance spectrometry?
It is typically read by researchers, students, and practitioners in Engineering.
- Author
- Daniel J. O'Donnell; Stan O. Sigle; K.Darrell Berlin; Gene P. Sturm; James W. Vogh
- Publisher
- Elsevier Science; Elsevier ; Elsevier BV (ISSN 0016-2361)
- Published
- 1980
- Language
- EN
- Field
- Engineering (Physical Sciences)