Hydrodynamic Shape and Size of Khafji Asphaltene in Benzene.

Three different semiaxes of Khafji asphaltene, assumed to be an ellipsoidal model, were calculated from the viscosity of a benzene solution of the asphaltene and from Harding's relationship between the axial ratio of an ellipsoid and the constant φ in Einstein's viscosity formula. The constant φ for carbon disulfide solution with fullerene showed that Einstein's formula was applicable to the benzene solution. The asphaltene consists of double layers with semiaxes of 31.