High-temperature two-dimensional gas chromatography of hydrocarbons up to nC60 for analysis of vacuum gas oils.
In a tense energetic context, the characterization of heavy petroleum fractions becomes essential. Conventional comprehensive two-dimensional gas chromatography (2D-GC or GCxGC) is widely used for middle distillates analysis, but only a few applications are devoted to these heavier fractions. In this paper, it is shown how the optimization of GCxGC separation allowed the determination of suitable high-temperature (HT) conditions, adjusting column properties and operating conditions. 2D separations were evaluated using 2D separation criteria and a new concept of 2D asymmetry (As(2D)). New HT conditions allowed the extension of GCxGC range of applications to heavier hydrocarbons, up to nC(60). A first application of high-temperature two-dimensional gas chromatography (HT-2D-GC) to a full vacuum gas oil (VGO) feed stock is described. Comparisons with other standardized methods illustrate the high potential of HT-2D-GC for heavy fractions analysis.
Dutriez
Thomas
T
Institut Français du Pétrole, BP3, 69360 Solaize, France.
Courtiade
Marion
M
Thiébaut
Didier
D
Dulot
Hugues
H
Bertoncini
Fabrice
F
Vial
Jérôme
J
Hennion
Marie-Claire
MC
D002849:Chromatography, Gas / Q000379:methods*; D006358:Hot Temperature; D006838:Hydrocarbons / Q000032:analysis*; D010578:Petroleum / Q000032:analysis*; D014618:Vacuum
D006838:Hydrocarbons; D010578:Petroleum