Preconversion processing of bituminous coals: New directions to improved direct catalytic coal liquefaction. Quarterly report, January 1, 1992--March 31, 1992
A study of the high-temperature soaking started in this quarter, following the installation of reactors in the previous quarter. Two high-volatile bituminous coals and three coal liquids, which were identified in the previous report, were used. A cross-linked, three-dimensional macromolecular model has been widely accepted f or the structure of coal, but there is no direct evidence to prove this model. The conventional coal structure model has been recently re-examined by this investigator because of the importance of relatively strong intra- and intermolecular interactions in bituminous coals. It was reasonable to deduce that significant portions were physically associated after a study of multistep extractions, associative equilibria, the irreversibility and the dependence of coal concentration on solvent swelling, and consideration of the monophase concept. Physical dissociation which may be significant above 300{degree}C should be utilized for the treatment before liquefaction. The high-temperature soaking in a recycle oil was proposed to dissociate coal complexes.
- Research Organization:
- BCR National Lab., Pittsburgh, PA (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC22-91PC91041
- OSTI ID:
- 10183296
- Report Number(s):
- DOE/PC/91041-T3; BCRNL-L-1658; ON: DE93000732
- Resource Relation:
- Other Information: PBD: Jul 1992
- Country of Publication:
- United States
- Language:
- English
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Preconversion processing of bituminous coals: New directions to improved direct catalytic coal liquefaction. Quarterly report, April 1, 1992--June 30, 1992
Preconversion processing of bituminous coals: New directions to improved direct catalytic coal liquefaction. Quarterly report, July 1, 1992--September 30, 1992