Experiments were conducted simulating hydrothermal conversion of heavy oil in the presence carbonate, kaolin, Al2O3, Ni2+ and Cu2+, NiO mixed with poly-?-olefins, C6H8O7, C2H4O2 at 290–375 °C 10–135 bar. carbonate 375 135 bar, accelerated resin degradation. 350 10 bar showed no significant composition changes. NiSO4, CuSO4, kaolin mineral, 78 decomposition resins (from 35.6% to 32.5%). Al2O3 29...

Abstract Bitumen is a complex mixture consisting of different hydrocarbons, which can be categorised into substance classes called SARA (saturates, aromatics, resins and asphaltenes) fractions. The saturates, aromatics are further referred to as maltenes or maltene phase. To determine the fractions asphaltenes were separated from in first step. A standard method separate column chromatography (...

The aggregation and adsorption of asphaltenes in dilute solutions has been extensively studied is now well established. At low concentrations, are mainly found the form aggregates approximately 3 nm size. One strategy to simplify study these systems fractionate into subfractions called A1 A2. nature subfraction aggregates, their behavior with concentration interaction other surfaces remain unde...

The influence of different factors on the asphaltene stability in three iranian crude oils was evaluated. Compositional studies ...