Modeling and Scaling of the Viscosity of Suspensions of Asphaltene Nanoaggregates
AbstractThe scaling and modeling of the viscosity of suspensions of asphaltene nanoaggregates is carried out successfully taking into consideration the solvation and clustering of nanoaggragates, and the jamming of the suspension at the glass transition volume fraction of asphaltene nanoaggregates. The nanoaggregates of asphaltenes are modeled as solvated disk-shaped “core–shell” particles taking into account the most recent small-angle neutron scattering (SANS), small-angle X-ray scattering (SAXS), and solid-state 1H NMR studies available on the size and structure of asphaltene nanoaggregates. This work is an extension of our earlier studies on modeling of asphaltene suspensions where solvation of asphaltene nanoaggregates was not considered. A new mathematical model is developed for estimating the aspect ratio (ratio of thickness to diameter of particle) and the corresponding intrinsic viscosity of suspension of solvated disk-shaped asphaltene nanoaggregates using the experimental relative viscosity data of suspensions at low asphaltene concentrations. The solvation of asphaltene nanoaggregates is found to be significant. The intrinsic viscosity increases with the increase in the degree of solvation of nanoaggregates. At high concentrations of asphaltenes, clustering of solvated nanoaggregates dominates resulting in large viscosities. A new scaling law is discovered to scale the viscosity data of different asphaltene suspensions. According to the new scaling law, a unique correlation is obtained, independent of the type of asphaltene system, when the data are plotted as
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Pal, R. Modeling and Scaling of the Viscosity of Suspensions of Asphaltene Nanoaggregates. Energies 2017, 10, 767.
Pal R. Modeling and Scaling of the Viscosity of Suspensions of Asphaltene Nanoaggregates. Energies. 2017; 10(6):767.Chicago/Turabian Style
Pal, Rajinder. 2017. "Modeling and Scaling of the Viscosity of Suspensions of Asphaltene Nanoaggregates." Energies 10, no. 6: 767.
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