Comparative Ebulliometry: a Simple, Reliable Technique for Accurate Measurement of the Number Average Molecular Weight of Macromolecules. Preliminary Studies on Heavy Crude Fractions
Université de Lyon (92 rue Pasteur - CS 30122, 69361 Lyon Cedex 07 - France)
Abstract : This article is divided into two parts. In the first part, the authors present a comparison of the major techniques for the measurement of the molecular weight of macromolecules. The bibliographic results are gathered in several tables. In the second part, a comparative ebulliometer for the measurement of the number average molecular weight (Mn) of heavy crude oil fractions is described. The high efficiency of the apparatus is demonstrated with a preliminary study of atmospheric distillation residues and resins. The measurement of molecular weights up to 2000 g/mol is possible in less than 4 hours with an uncertainty of about 2%.
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E. Behar, A. Barreau, D. Vellut, J. Jose. Comparative Ebulliometry: a Simple, Reliable Technique for Accurate Measurement of the Number Average Molecular Weight of Macromolecules. Preliminary Studies on Heavy Crude Fractions. Revue de l'Institut Français du Pétrole, EDP Sciences, 1998, 53 (6), pp.839-855. ⟨10.2516/ogst:1998072⟩. ⟨hal-02079049⟩
