Thermodynamic model for calorimetric and phase coexistence properties of coal derived fluids
A model for phase equilibria of coal derived liquids is to be extended to include calorimetric properties as well. To accomplish this satisfactorily, the proposed work includes three tasks: (1) Refinement of the characterization procedure to include distribution of sulfur, oxygen, and nitrogen heteroatoms in coal liquids; (2) Measurement of high temperature (up to 400{degrees}C) and high pressure (up to 1000 psi) VLE data for binary systems of selected model compounds; and (3) Development of the thermodynamic model. The final product will include a computer program which with measurable properties of coal liquids as input, will give results for phase coexistence properties and excess enthalpies in the liquid phase. Efforts are continuing to apply the new thermodynamic model for VLE and enthalpy predictions for coal liquids by the methods of continuous thermodynamics. Recently, Thompson, Brobst and Hankinson have developed an equation of state that represents compressibilities of liquids very well. The authors have undertaken the task of combining this equation of state with their thermodynamic model to provide a comprehensive model for high pressure liquid mixtures. Calibration and preliminary set-up procedure for the VLE apparatus with the new liquid level sensor have been completed. The apparatus is currently being tested with the binary system quinoline-tetralin. Chromatographic characterization work was delayed because of complexities of the calibration procedure and tedious calculations necessary for number average and weight average molecular weights. Results on the chromatographic studies are being deferred until computer software is received.
- Research Organization:
- North Carolina Agricultural and Technical State Univ., Greensboro, NC (USA). Dept. of Chemical Engineering
- Sponsoring Organization:
- USDOE; USDOE, Washington, DC (USA)
- DOE Contract Number:
- FG22-89PC89762
- OSTI ID:
- 5993329
- Report Number(s):
- DOE/PC/89762-T6; ON: DE91010560
- Country of Publication:
- United States
- Language:
- English
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Thermodynamic model for calorimetric and phase coexistence properties of coal derived fluids
Thermodynamic model for calorimetric and phase coexistence properties of coal derived fluids
Related Subjects
COAL LIQUIDS
THERMODYNAMIC MODEL
CALIBRATION
CALORIMETRY
COMPRESSIBILITY
COMPUTER CODES
DATA ANALYSIS
ENTHALPY
EQUATIONS OF STATE
EQUILIBRIUM
GEL PERMEATION CHROMATOGRAPHY
MIXTURES
ORGANIC NITROGEN COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
ORGANIC SULFUR COMPOUNDS
PERFORMANCE TESTING
PHASE STUDIES
PROGRESS REPORT
QUINOLINES
STRUCTURAL CHEMICAL ANALYSIS
TEST FACILITIES
TETRALIN
THERMODYNAMIC PROPERTIES
AROMATICS
AZAARENES
AZINES
CHROMATOGRAPHY
DISPERSIONS
DOCUMENT TYPES
EQUATIONS
FLUIDS
HETEROCYCLIC COMPOUNDS
HYDROCARBONS
LIQUIDS
MATHEMATICAL MODELS
MECHANICAL PROPERTIES
ORGANIC COMPOUNDS
PARTICLE MODELS
PHYSICAL PROPERTIES
PYRIDINES
SEPARATION PROCESSES
STATISTICAL MODELS
TESTING
010600* - Coal
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& Peat- Properties & Composition