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 ı C and >280 ı C, but not much influence on the distillate with a boiling range of 200-280 ı C. The density of two coal liquefaction oils linearly decreased with the increasing of temperature, and could be regressed as D At C B. The relationship between volume expansion coefficient and the linear coefficient˛D A=B was also derived. The influence of end boiling point on viscosity was small when the distillates were <300 ı C, but prominent as they were >300 ı 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.