Phase equilibrium in coal liquefaction processes. Final report, January 1, 1975--December 31, 1976. [35 refs]

Technical Report · Wed Jun 01 00:00:00 EDT 1977

DOI:https://doi.org/10.2172/7305813· OSTI ID:7305813

Chao, K. C.

Gas-liquid equilibria in mixtures of hydrogen and heavy hydrocarbons were determined experimentally in simulation of coal liquefaction process conditions. A flow apparatus was built to produce the saturated equilibrium liquid and gas samples at temperatures up to 430/sup 0/C and pressures to 250 atm. Equilibrium data were obtained on four binary mixture systems of hydrogen with tetralin, diphenylmethane, 1-methylnaphthalene, and bicyclohexyl, respectively. Comparison of the new data on the vapor-liquid ratio K of hydrogen was made with the correlations of Chao and Seader, and Grayson and Streed. Substantial deviations of the data from the correlations were indicated up to 37% from the Chao-Seader, and 30% from the Grayson-Streed. However, the new data show a regular orderly behavior with respect to the solubility parameter of the solvent, indicating that improved correlation can be developed based on the Chao-Seader scheme. Additional new data are needed on hydrogen solubility in other solvents and in mixtures including coal liquids to revise the existing correlations for improved results or for developing new correlations.

• Research Organization: Purdue Univ., Lafayette, IN (USA). School of Chemical Engineering
• OSTI ID: 7305813
• Report Number(s): EPRI-AF-466
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010405* -- Coal
Lignite
& Peat-- Hydrogenation & Liquefaction
COAL LIQUEFACTION
COAL LIQUIDS
CRYOGENIC FLUIDS
ELEMENTS
EQUILIBRIUM
EQUIPMENT
FLUIDS
HYDROCARBONS
HYDROGEN
LIQUEFACTION
NONMETALS
ORGANIC COMPOUNDS
PHASE STUDIES
SAMPLING
SIMULATION
SOLUBILITY
THERMOCHEMICAL PROCESSES