Enthalpy measurement of coal-derived liquids. Quarterly technical progress report, April-June 1980. [107 references; effect and extent of assoiation]
Cryoscopic molecular weight determinations were made on 5 pure compounds and 7 coal liquids. The accuracy of the measurements, based on the data for pure compounds, was estimated to be within +- 10% of the actual value. A linear relationship between the molecular weight and concentration of sample in the benzene solvent was observed. It was found that the slope of the line correlated directly with the absolute error, between the predicted and experimental enthalpy values, for all the liquids studied. As the slope increased, the absolute error also increased. Thus, the cryoscopic molecular weight determinations, as a function of concentration, were found to be an excellent indication of the extent and effect of association in any given fluid; and, as such, should be preferred as a characterizing tool, over the viscosity measurements, or any combination of the two.
- Research Organization:
- Colorado School of Mines, Golden (USA)
- DOE Contract Number:
- AC22-79ET13395
- OSTI ID:
- 5044320
- Report Number(s):
- DOE/ET/13395-5
- Country of Publication:
- United States
- Language:
- English
Similar Records
Enthalpy measurement of coal-derived liquids. Technical progress report, November 1982-January 1983
Measurement and correlation of the enthalpy of coal-derived liquids
Related Subjects
010405 -- Coal
Lignite
& Peat-- Hydrogenation & Liquefaction
010600* -- Coal
Lignite
& Peat-- Properties & Composition
COAL LIQUEFACTION
COAL LIQUIDS
CORRELATIONS
CRYOSCOPY
DATA
ENTHALPY
EXPERIMENTAL DATA
FLUIDS
INFORMATION
LIQUEFACTION
LIQUIDS
MEASURING METHODS
MOLECULAR WEIGHT
NUMERICAL DATA
PHYSICAL PROPERTIES
STRUCTURAL MODELS
THERMOCHEMICAL PROCESSES
THERMODYNAMIC PROPERTIES