首页|Structural Characteristics and Interfacial Properties of n-Hexane- and n-Heptane-Asphaltenes
Structural Characteristics and Interfacial Properties of n-Hexane- and n-Heptane-Asphaltenes
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NSTL
Springer Nature
In this study, n-hexane-asphaltenes (X-A) and n-heptane-asphaltenes (P-A) were separated and collected by n-hexane and n-heptane respectively. The two asphaltenes were divided into six subtractions (A1-A6) by the mixed solvent (toluene/n-hexane or toluene/n-heptane). The differences between X-A and P-A were studied and the differences between subtractions were compared. And the effects of X-A, P-A and subtractions on oil-water interfacial tension (IFT) were evaluated. The content and polarity of X-A are greater than that of P-A. The ability of X-A reducing oil/water IFT is stronger than that of P-A. The structures of X-A and P-A were simply speculated by the improved B-L method (Bitumen-Liquid product method is used to calculate structural parameters). Both P-A and X-A are cata-condensed and they are mainly tricyclic-aromatics. Moreover, X-A is a kind of high condensation aromatic polymer with regular arrangement, short alkyl chains, low rigidity and more naphthenic rings. P-A is a kind of high condensation aromatic polymer with poor arrangement regularity, long alkyl chains, large rigidity, more aromatic rings but slightly less condensation degree than X-A.
NSTL
Springer Nature
