Density, viscosity, and surface tension of coal liquids at high temperatures and pressures

Abstract

Density, viscosity, and surface tension of coal liquids have been experimentally determined at temperatues up to 850/degree/F and pressures up to 3200 psia. Measurements were made on liquids produced with the Exxon Donor Solvent process from Illinois and Wyoming coals. Several measurements were also made to determine the effect of dissolved hydrogen on the physical properties of coal liquids. These data were used to investigate the applicability of the existing physical property correlations to coal-derived liquids. Results indicate that the existing correlations are generally satisfactory for the temperature and pressure dependence of density but are unsatisfactory for the viscosity and surface tension of coal-derived liquids. 27 refs.