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Characterization of heavy sulfur aromatic compounds in petroleum fractions

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Panda,  Saroj K.
Service Department Schrader (MS), Max-Planck-Institut für Kohlenforschung, Max Planck Society;

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Schrader,  Wolfgang
Service Department Schrader (MS), Max-Planck-Institut für Kohlenforschung, Max Planck Society;

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Citation

Andersson, J. T., Japes, A., Panda, S. K., & Schrader, W. (2008). Characterization of heavy sulfur aromatic compounds in petroleum fractions. In Abstracts of Scientific Papers of the American Chemical Society (pp. FUEL-2).


Cite as: https://hdl.handle.net/21.11116/0000-0007-0BF3-B
Abstract
Sulfur aromatic compounds in crude oil and heavy fractions like vacuum gas oils are investigated with an ultimate view to finding out structural characteristics of compounds refractory to hydrodesulfurization. A combination of liquid chromatographic methods and ultrahigh resolving Fourier transform ion cyclotron resonance mass spectrometry is used.

A palladium(II) containing stationary phase separates the polycyclic aromatic hydrocarbons from the polycyclic aromatic sulfur heterocycles and a third fraction that seems to contain aliphatic sulfides. The sulfur aromatic compounds can be separated based on the size of their aromatic system. The compounds are analyzed by high-resolution mass spectrometry and the data displayed as Kendrick plots, i.e. the double bond equivalent vs. the mass. Hydrodesulfurization of a vacuum gas oil is shown to preferentially remove benzothiophenes.

The sulfide fraction is less aromatic than the sulfur aromatic fraction but the molar masses are also in the range up to ca 800 Da.