High P/T phase and volumetric behavior of coal liquid constituents. (Quarterly technical progress report), April 1-July 1, 1984. [Xanthene; 423 to 589/sup 0/K]

Technical Report · Sun Jan 01 04:00:00 EST 1984

OSTI ID:6492250

Kobayashi, R

Vapor pressures (6.35 to 817.29 mm Hg) of xanthene, a polynuclear aromatic (three ring) compound containing an oxygen group, over the temperature range 423 to 589/sup 0/K, were measured. The measurements were performed in a high temperature static apparatus. Chebyshev polynomials have been used to fit the experimental vapor pressure data. The results have been further processed to evaluate the enthalpies of vaporization. The entropies of vaporization of xanthene were also evaluated at the respective temperatures. Also, a corresponding states correlation has been developed using renormalization group theory, phenomenological scaling theory and Pitzer et al.'s (1955) three-parameter corresponding states principle to predict latent heats of vaporization for simple fluids (aliphatic and aromatic hydrocarbons, including complex coal liquid model compounds) from the freezing point to the critical point. The resulting correlation consists of an expansion in the acentric factor which is truncated after the second term, in accordance with the linear dependence observed for experimental data. The results show root-mean square deviations between reported and predicted heats of vaporization in the range 0.46% to 6.93% for coal liquid model compounds, in the range of reduced temperatures 0.02 < epsilon = (T/sub c/ - T)T/sub c/ < 0.69. 2 references.

• Research Organization: Rice Univ., Houston, TX (USA). Dept. of Chemical Engineering
• DOE Contract Number: FG22-82PC50811
• OSTI ID: 6492250
• Report Number(s): DOE/PC/50811-T4; ON: DE85000498
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010405* -- Coal
Lignite
&amp; Peat-- Hydrogenation &amp; Liquefaction
AROMATICS
COAL LIQUIDS
CORRELATIONS
ENTHALPY
FLUIDS
FORECASTING
HYDROCARBONS
LIQUIDS
ORGANIC COMPOUNDS
PHYSICAL PROPERTIES
POLYCYCLIC AROMATIC HYDROCARBONS
STRUCTURAL MODELS
THERMODYNAMIC PROPERTIES
TRANSITION HEAT
VAPOR PRESSURE
VAPORIZATION HEAT