Influence of primary oil processing on the composition and molecular structure of resin-asphaltene components
T. V. CHESHKOVA1, E. YU. KOVALENKO1, M. A. KOPYTOV1, K. A. CHEREDNICHENKO2, T. A. SAGACHENKO1, R. S. MIN1
1Institute of Petroleum Chemistry, Siberian Branch of the Russian Academy of Sciences, Tomsk, Russia
2Russian State University of Oil and Gas (National Research University) named after I. M. Gubkin, Moskow, Russia
Keywords: crude oil, fuel oil, asphaltenes, resins, composition, structure
Abstract
A comparative study of the composition of the supramolecular and molecular structure of resin-asphaltene components isolated from the light oil of the Krapivinskoye field and heavy oil of the Usinsk field and the residues after their atmospheric distillation has been carried out. Using a set of methods - scanning and transmission electron microscopy, X-ray diffraction and structural group analysis - the features of the surface morphology of asphaltenes and their nano- and microstructure, as well as the features of the structural organisation of oil resins before and after their primary processing were revealed. It has been established that asphaltenes and resins of heavy oil undergo more pronounced structural transformations. The results obtained expand the understanding of the behaviour of high-molecular oil components under thermal action and can be used to optimise technologies for processing residual fractions and predict their operational properties.
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