HYDROCARBON GROUP TYPE ANALYSIS OF PETROLEUM HEAVY FRACTIONS USING THE TLC-FID TECHNIQUE

Hydrocarbon group type analysis is important in all conversion process es and in preparation of feed for these conversion processes so as to learn the selectivity of the different type of catalysts for product y ield and quality. The use of the Mark 5 Iatroscan detector and the met hod reported here allowed for a rapid and quantitative hydrocarbon gro up type analysis of petroleum residues without prior separation of asp haltenes. SARA type analyses of petroleum residues have been performed by a three stage development using n-hexane, toluene and DCM (95%):Me OH (5%). The standard deviation and coefficient of variation in repeat ed measurements by this method were as low as 0.65 wt% or less and 3.5 wt% or less, respectively. The time required for analysis of 10 sampl es could be as short as 90 min.