Multidimensional gas chromatography for the detailed PIONA analysis of heavy naphtha: hyphenation of an olefin trap to comprehensive two-dimensional gas chromatography.
A multidimensional method providing the composition of a heavy naphtha in paraffins, isoparaffins, olefins, naphthenes, and aromatics (PIONA) in the C8-C14 range is presented. The analytical set-up consists in a silver modified silica olefin trap on-line coupled to comprehensive two-dimensional gas chromatography (GC x GC). In this configuration, hydrocarbons are separated, in gaseous state, in two fractions, saturate and unsaturate, each fraction being subsequently analysed by GC or by GC x GC. The resolution between saturates and olefins was found to be improved compared to a single GC x GC run. The characterisation of the olefin trap highlights the benefits and the limits related to the use of that stationary phase as a double bond selective fractionation medium.
Vendeuvre
Colombe
C
Direction Physique et Analyse, Institut Français du Pêtrole, BP3, 69390 Vernaison, France.
Bertoncini
Fabrice
F
Espinat
Didier
D
Thiébaut
Didier
D
Hennion
Marie-Claire
MC
D000473:Alkanes / Q000032:analysis*; D000475:Alkenes / Q000737:chemistry*; D002849:Chromatography, Gas / Q000379:methods*; D009862:Online Systems; D010578:Petroleum / Q000032:analysis*; D013816:Thermodynamics
D000473:Alkanes; D000475:Alkenes; D010578:Petroleum; C004544:naphtha