Coal pretreatment for two stage liquefaction. Quarterly report, April 1-June 30, 1985
The overall objectives are to investigate the fundamental problems and technical feasibility of selectively separating coal constituents and to determine the effects of the substantial removal of inorganic components or individual macerals on coal liquefaction. To achieve these aims, the following specific tasks will be undertaken: (1) procurement, characterization and storage of coals and solvents; (2) coal pretreatment; (3) characterization of size density fractions; and (4) coal liquefaction research. Attempts have been made to fit a liberation model to the size density fractionation of subbituminous coals. Two different approaches were tried and neither was considered to be satisfactory due to certain basic assumptions which had to be made. Work is continuing on this problem. Considerable progress has been made in the construction of the autoclave reactor for conducting thermal and catalytic liquefaction experiments in either a single or two-stage sequence. It is estimated that the system will be operational by the end of October. Tubing bomb experiments have confirmed that low temperature pretreatment, while not apparently influencing net conversion, has a strong influence on increasing the oil to asphaltene ratio in the liquefied products. Other experiments have shown that the presence of an active catalyst does not fully compensate for deficiencies in solvent quality. 1 ref.
- Research Organization:
- Pennsylvania State Univ., University Park (USA). Coll. of Earth and Mineral Sciences
- DOE Contract Number:
- FG22-84PC70003
- OSTI ID:
- 5286956
- Report Number(s):
- DOE/PC/70003-T5; ON: DE85016252
- Country of Publication:
- United States
- Language:
- English
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AUTOCLAVES
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