Enthalpy measurement of coal-derived liquids. Technical progress report, November 1982-January 1983
The objective of this research is to measure the enthalpy for representative coal-derived liquids and model compounds over the pressure and temperature regions most likely to be encountered in both liquefaction and processing systems, and to prepare from the data an enthalpy correlation suitable for process design calculations. The correlational effort this past quarter on the enthalpy of coal-derived syncrudes and model compounds has emphasized the experimental determination of a correlating factor for association in coal liquids. As in previous work, the degree of association is to be related to cryoscopic molecular weight determinations on the coal liquids. To this end, work on and an evaluationof a cryoscopic molecular weight apparatus was completed this quarter. Molecular weights of coal liquids determined by the standard Beckman freezing point depression apparatus were consistently low (5 to 10%). After modifications of the apparatus, it was tested with the following compounds: hexane, dodecane, m-xylene and naphthalene. Benzene was the solvent used. However, the molecular weight measurements were again consistently lower than the true values, and in many cases the experimental error was greater than that of the Beckman apparatus.
- Research Organization:
- Colorado School of Mines, Golden (USA). Dept. of Chemical and Petroleum Refining Engineering
- OSTI ID:
- 6787266
- Report Number(s):
- DOE/PC/40787-7; ON: DE83007293
- Country of Publication:
- United States
- Language:
- English
Similar Records
Enthalpy measurement of coal-derived liquids. Quarterly technical progress report, April-June 1980. [107 references; effect and extent of assoiation]
Enthalpy measurement of coal-derived liquids. Combined quarterly technical progress reports, October-December 1979 and January-March 1980. [107 references; detection and quantification of effect of association]
Related Subjects
COAL LIQUIDS
ENTHALPY
MOLECULAR WEIGHT
DODECANE
HEXANE
NAPHTHALENE
XYLENES
CRYOSCOPY
EQUIPMENT
RESEARCH PROGRAMS
STRUCTURAL MODELS
ALKANES
AROMATICS
CONDENSED AROMATICS
FLUIDS
HYDROCARBONS
LIQUIDS
ORGANIC COMPOUNDS
PHYSICAL PROPERTIES
THERMODYNAMIC PROPERTIES
010600* - Coal
Lignite
& Peat- Properties & Composition
010405 - Coal
Lignite
& Peat- Hydrogenation & Liquefaction