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Title: Solvent tailoring in coal liquefaction. Quarterly report, May 1982-August 1982. [Comparison of subcritical and supercritical conditions]

Abstract

The initial objective of this work was to study the phase distribution of donor solvents and solvent mixtures during the liquefaction of coal, to investigate the effects of phase distribution on coal conversion, and to determine the advantages, if any, of operating at subcritical and/or supercritical conditions. Computer simulations were used to predict the phase distribution, for various binary systems, as a function of temperature. The FLASH program was used to theoretically predict phase distribution for various model systems. Due to limitations in the computer program, success was achieved only in a few cases. Even in these cases, the existence of two-phase regions was observed only at temperatures and pressures far below normal liquefaction conditions. An extensive review of the literature was carried out in order to survey methods of experimentally studying vapor-liquid equilibria. Finally, some preliminary laboratory studies were carried out with the use of benzothiophene-dodecane as the model reaction system. It was felt that the study of the effect of reactor configuration on conversion would provide insight into whether phase distribution or mass transfer was the limiting consideration for coal conversion. However, no conclusive results were obtained from these studies.

Authors:
; ; ;
Publication Date:
Research Org.:
Auburn Univ., AL (USA)
OSTI Identifier:
5843088
Report Number(s):
DOE/PC/30209-T1
ON: DE83017443
DOE Contract Number:
FG22-80PC30209
Resource Type:
Technical Report
Resource Relation:
Other Information: Portions are illegible in microfiche products
Country of Publication:
United States
Language:
English
Subject:
01 COAL, LIGNITE, AND PEAT; COAL LIQUEFACTION; COMPUTERIZED SIMULATION; ORGANIC SOLVENTS; PHASE STUDIES; BINARY MIXTURES; CHEMICAL REACTORS; COMPUTER CALCULATIONS; CRITICAL PRESSURE; CRITICAL TEMPERATURE; CYCLOHEXANE; DODECANE; EQUILIBRIUM; HEXADECANE; HEXANE; LIQUIDS; NAPHTHALENE; NUMERICAL DATA; PRESSURE DEPENDENCE; TEMPERATURE DEPENDENCE; TETRALIN; THIONAPHTHENES; TOLUENE; VAPORS; XYLENES; ALKANES; AROMATICS; CONDENSED AROMATICS; CYCLOALKANES; DATA; DISPERSIONS; FLUIDS; GASES; HETEROCYCLIC COMPOUNDS; HYDROCARBONS; INFORMATION; LIQUEFACTION; MIXTURES; ORGANIC COMPOUNDS; ORGANIC SULFUR COMPOUNDS; PHYSICAL PROPERTIES; SIMULATION; SOLVENTS; THERMOCHEMICAL PROCESSES; THERMODYNAMIC PROPERTIES; TRANSITION TEMPERATURE; 010405* - Coal, Lignite, & Peat- Hydrogenation & Liquefaction

Citation Formats

Tarrer, A.R., Guin, J.A., Curtis, C.W., and Williams, D.C. Solvent tailoring in coal liquefaction. Quarterly report, May 1982-August 1982. [Comparison of subcritical and supercritical conditions]. United States: N. p., 1982. Web. doi:10.2172/5843088.
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Tarrer, A.R., Guin, J.A., Curtis, C.W., & Williams, D.C. Solvent tailoring in coal liquefaction. Quarterly report, May 1982-August 1982. [Comparison of subcritical and supercritical conditions]. United States. doi:10.2172/5843088.
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Tarrer, A.R., Guin, J.A., Curtis, C.W., and Williams, D.C. Fri . "Solvent tailoring in coal liquefaction. Quarterly report, May 1982-August 1982. [Comparison of subcritical and supercritical conditions]". United States. doi:10.2172/5843088. https://www.osti.gov/servlets/purl/5843088.
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@article{osti_5843088,
title = {Solvent tailoring in coal liquefaction. Quarterly report, May 1982-August 1982. [Comparison of subcritical and supercritical conditions]},
author = {Tarrer, A.R. and Guin, J.A. and Curtis, C.W. and Williams, D.C.},
abstractNote = {The initial objective of this work was to study the phase distribution of donor solvents and solvent mixtures during the liquefaction of coal, to investigate the effects of phase distribution on coal conversion, and to determine the advantages, if any, of operating at subcritical and/or supercritical conditions. Computer simulations were used to predict the phase distribution, for various binary systems, as a function of temperature. The FLASH program was used to theoretically predict phase distribution for various model systems. Due to limitations in the computer program, success was achieved only in a few cases. Even in these cases, the existence of two-phase regions was observed only at temperatures and pressures far below normal liquefaction conditions. An extensive review of the literature was carried out in order to survey methods of experimentally studying vapor-liquid equilibria. Finally, some preliminary laboratory studies were carried out with the use of benzothiophene-dodecane as the model reaction system. It was felt that the study of the effect of reactor configuration on conversion would provide insight into whether phase distribution or mass transfer was the limiting consideration for coal conversion. However, no conclusive results were obtained from these studies.},
doi = {10.2172/5843088},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Fri Jan 01 00:00:00 EST 1982},
month = {Fri Jan 01 00:00:00 EST 1982}
}
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Technical Report:
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DOI:  10.2172/5843088
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