Determination of the Density and Viscosity of Coal Liquefaction Oil Distillates from China

Abstract

Density/viscosity of Shengli and Shenhua coal liquefaction oil distillates from China was measured; and the relationship of density/viscosity with the end boiling point was regressed. The result indicated that the influence of end boiling point for density/viscosity was obvious for the distillates with end boiling point <200°C and >280°C, but not much influence on the distillate with a boiling range of 200–280°C. The density of two coal liquefaction oils linearly decreased with the increasing of temperature, and could be regressed as ρ = At + B. The relationship between volume expansion coefficient and the linear coefficient α = −A/B was also derived. The influence of end boiling point on viscosity was small when the distillates were <300°C, but prominent as they were >300°C. Viscosity dropped down with the temperature increasing. The viscosity-temperature property of light oil was better than that of medium oil and heavy oil. The relationship between viscosity and temperature conformed to the Andrade correlation.