Molecular Weight Calibration of Asphaltenes Using Gel Permeation Chromatography/Mass Spectrometry

Molecular weight (MW) is one of the most important properties of asphaltene. To determine the precise average MW using gel permeation chromatography (GPC), the MWs obtained for three different asphaltenes using GPC (MWps) and GPC-MSD (MWms) were compared. MWms proved independent of asphaltene type a...

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Bibliographic Details
Published in:Energy & fuels 2005-09, Vol.19 (5), p.1991-1994
Main Authors: Sato, Shinya, Takanohashi, Toshimasa, Tanaka, Ryuzo
Format: Article
Language:English
Subjects:
Applied sciences
Constitution and properties of crude oils, shale oils, natural gas and bitumens. Analysis and characteristics
Crude oil, natural gas and petroleum products
Energy
Exact sciences and technology
Fuels
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Summary:Molecular weight (MW) is one of the most important properties of asphaltene. To determine the precise average MW using gel permeation chromatography (GPC), the MWs obtained for three different asphaltenes using GPC (MWps) and GPC-MSD (MWms) were compared. MWms proved independent of asphaltene type and had values similar to MWps for a MW of ∼900 but was significantly different in the lower-MW range, with a linear correlation between MWms and MWps. More-precise average MW values can be obtained using a revised calibration curve based on three new chemicals to convert MWps to MWms.
ISSN:0887-0624
1520-5029
DOI:10.1021/ef049672r