Thermodynamic Properties of Real and Synthetic Fluid Mixtures Derived from Fossil Substances. Phase Behavior Study of Hydrogen and 450-950 deg F Coal Liquid from a Coal Liquefaction Unit at Wilsonville, Alabama

摘要

Experimental vapor-liquid-equilibrium (VLE) and density data were determined on hydrogen with a 450 to 95o sup 0 F boiling range coal liquid at 573.2, 623.2, and 673.2 K and at pressures up to 20.7 MPa. This work was part of an effort to obtain a comprehensive set of physical, chemical, and thermodynamic data on a representative coal liquid. Significant dealkylation and possibly some hydrogenation occurred during measurements on the 673.2 K isotherm. Concentrations of light gases in each phase was determined by gas chromatography. The concentration of the heavier components was determined by simulated distillation and by low-voltage, high-resolution, mass-spectral analysis. The Soave modified Redlich-Kwong equation of state was used to test the data when the system was treated as a single component liquid in equilibrium with a single component gas. One temperature dependent interaction parameter was required to represent the data within experimental uncertainty. Additional hydrogen solubility and VLE data were tested. Tentative linear correlations of the interaction parameters as a function of pseudo-critical pressures, pseudo-critical temperatures, and average molecular weights were developed. 18 refs., 21 figs., 25 tabs. (ERA citation 11:031336)