The aim of this contribution is to tackle the molecular size distribution of the asphaltene macromolecules containing nickel and vanadium in one shot using SEC-ICP/MS. Various samples are investigated: n-heptane asphaltenes recovered by solvent deasphalting of a petroleum vacuum residue, asphaltenes with different molecular weights separated by cross-flow ultrafiltration, and unconverted asphaltenes from catalytic hydrotreatment.The SEC-ICP/MS technique can significantly contribute to a better knowledge of the metal size distribution species on heavy feedsctocks, asphlatene fractions, maltene fractions and for different upgraded heavy fractions.

Application of the hyphenated technique, size exclusion chromatography: Induced coupled plasma mass spectrometry (SEC-ICP/MS), for the size distribution characterization of nickel and vanadium compounds in heavy oil fractions

246th National Meeting (2013)

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