Composition and Structure Changes of Asphaltenes of Oil from the Usinsk Field during Sequential Stepwise Thermal Decomposition
D. S. KORNEEV1, G. S. PEVNEVA1, A. K. GOLOVKO1,2
1Institute of Petroleum Chemistry, SB RAS, Tomsk, Russia
2Trofimuk Institute of Petroleum Geology and Geophysics, SB RAS, Tomsk, Russia
Keywords: тяжелая нефть, ступенчатый термолиз, асфальтены, состав, структура, структурно-групповой анализ, heavy oil, stepwise thermolysis, asphaltenes, composition, structural-group analysis
Pages: 208-213
Abstract
Composition and structure changes of the macromolecules of asphaltenes from the Usinsk deposit were studied during sequential stepwise thermal decomposition at 120, 230, and 370 °C. Component composition data of thermolysis products were acquired and changes in structural-group characteristics of asphalthene molecules during thermal treatment were described. It was found that below 230 °С, asphaltene decomposition reactions prevailed over condensation ones, while above this temperature, compaction reactions were prevalent. It was demonstrated that the trend of heteroatoms towards accumulation in compaction products during stepwise thermolysis of oil asphaltenes from the Usinsk field increased in the series S → N → O.
DOI: 10.15372/CSD20180214
|
