Thermodynamic properties for supercritical coal conversion. Quarterly progress report, April 1-June 30, 1986

Technical Report · Wed Jan 01 04:00:00 EST 1986

OSTI ID:5562949

Eckert, C A

The objective of this research is to investigate the behavior of supercritical fluid (SCF) systems for the purpose of processing coal. The medium temperature solubility apparatus completed last quarter is currently being run with supercritical ammonia solvent (Tc = 132/sup 0/C). Solubilities of anthracene were measured at 142/sup 0/C and 162/sup 0/C over a pressure range of 1850 to 5000 psia. Runs with dodecahydrotriphenylene have been completed at 142/sup 0/C. Runs at 162/sup 0/C are currently in progress. We attempted to determine the solubility of thioxanthone in ammonia but the solute appears to be reacting and is under investigation. Phenazine and thianthrene were too soluble to obtain reasonable results with the apparatus. The solubility of dibenzothiophene and dibenzofuran in carbon dioxide have been measured at 35, 50, and 70/sup 0/C in the low temperature apparatus. Studies with carbazole were discontinued due to virtual insolubility at these low temperatures. However, we have measured the solubility of thianthrene in carbon dioxide at 35 and 50/sup 0/C. Runs at 70/sup 0/C are currently in progress. High temperature supercritical solvents like ammonia show significant potential in extracting coal type compounds. Studies with anthracene and dodecahydrotriphenylene indicate higher solubilities than in lower temperature solvents like carbon dioxide. 3 figs.

• Research Organization: Illinois Univ., Urbana (USA). Dept. of Chemical Engineering
• DOE Contract Number: FG22-84PC70801
• OSTI ID: 5562949
• Report Number(s): DOE/PC/70801-T7; ON: DE86013652
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010405 -- Coal
Lignite
& Peat-- Hydrogenation & Liquefaction
010407* -- Coal & Coal Products-- Solvent Extraction-- (-1987)
AMMONIA
ANTHRACENE
AROMATICS
BENZOFURANS
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CARBONACEOUS MATERIALS
CHALCOGENIDES
COAL
CONDENSED AROMATICS
EMISSION SPECTROSCOPY
ENERGY SOURCES
EXTRACTION
FLUORESCENCE SPECTROSCOPY
FOSSIL FUELS
FUELS
FURANS
HETEROCYCLIC COMPOUNDS
HIGH PRESSURE
HIGH TEMPERATURE
HYDRIDES
HYDROCARBONS
HYDROGEN COMPOUNDS
MATERIALS
MEDIUM TEMPERATURE
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
ORGANIC SULFUR COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
RESEARCH PROGRAMS
SEPARATION PROCESSES
SOLUBILITY
SOLVENT EXTRACTION
SOLVENT PROPERTIES
SPECTROSCOPY
STRUCTURAL MODELS
SUPERCRITICAL GAS EXTRACTION
SUPERCRITICAL STATE
THIONAPHTHENES