Diffusion-averaged molecular weights of «nonboiling» crude oil fractions |
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Authors: | K Jost W Steuer I Halász |
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Institution: | (1) Lehrstuhl für Angewandte Physikalische Chemie, Universität des Saarlandes, 6600 Saarbrücken, FRG |
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Abstract: | Summary The successful application of the formerly presented concept of diffusion-averaged molecular weight, Md, to vacuum residues of crude oils, or their fractions, is described. The samples for establishing the calibration curve, logDvs. logM, were crude oil fractions with polydispersities smaller than 1.1. In a surprisingly good approximation the calibration curve is independent of the origin of these fractions if 500<M<10000. The validity of our calibration curve was demonstrated with more than 10 crude oil residues and with some of their hydrogenation residues 2]. |
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Keywords: | Liquid chromatography equipment Open tubes Diffusion coefficients Calibration curve Diffusion-averaged molecular weight Polydispersity |
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