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

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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 ... continued below

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Pages: 76

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Tarrer, A.R.; Guin, J.A.; Curtis, C.W. & Williams, D.C. January 1, 1982.

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Description

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.

Physical Description

Pages: 76

Notes

NTIS, PC A05/MF A01; 1.

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  • Other Information: Portions are illegible in microfiche products

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  • Other: DE83017443
  • Report No.: DOE/PC/30209-T1
  • Grant Number: FG22-80PC30209
  • DOI: 10.2172/5843088 | External Link
  • Office of Scientific & Technical Information Report Number: 5843088
  • Archival Resource Key: ark:/67531/metadc1095666

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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Creation Date

  • January 1, 1982

Added to The UNT Digital Library

  • Feb. 18, 2018, 3:59 p.m.

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  • March 20, 2018, 8:41 p.m.

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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], report, January 1, 1982; United States. (digital.library.unt.edu/ark:/67531/metadc1095666/: accessed August 19, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.