Characterization and Property Correlations of Athabasca Bitumen Derived Synthetic Crude Oil

摘要

Narrow fractions of Athabasca bitumen derived synthetic crude oil (SCO) were prepared by distillation at 20°C increment up to 500~C and characterized. The characteristics of naphtha fractions (IBP-130°C, IBP-180°C and IBP-200°C), jet ,fuel fractions (130-230°C and 160-240°C) and diesel fractions (180-320°C and 230-350°C) were also determined. The SCO properties were correlated as a function of boiling temperature (T<,b>). This is useful for process design considerations such as optimizing operating conditions of refinery processing units. The viscosity (ν) of SCO fraction at various temperatures (T) can be expressed as: log(log(v+0.775)): exp(1.256+0.4179×log(T<,b>))-4.491×log T The acidity of SCO fraction (in mg KOH/1000 ml) showed a maximum at 350°C and can be expressed as: Sulfur and nitrogen concentrations were below 10ppm in IBP-180~C fraction, but increased dramatically in fractions greater than 180°C. These can be expressed as:　 Suffur=exp(1. 650+6.317/(1+(exp-(T<.b>-549.205)/39. 410) ) ) Nitrogen=exp(l.844+6.340/(1+(exp-(T<,b>- 567.183)/58.150))) The SCO yield as a function of boiling temperature can be indirectly predicted using a 4<'th> order polynomial of the density or refractive index, with O.038% deviation. The properties of naphtha, jet fuel and diesel fractions can be predicted accurately by integrating the boiling point at 10, 30, 50, 70 and 90 v% yield of each fraction.