Coal-oil slurry preparation
A pumpable slurry of pulverized coal in a coal-derived hydrocarbon oil carrier which slurry is useful as a low-ash, low-sulfur clean fuel, is produced from a high sulfur-containing coal. The initial pulverized coal is separated by gravity differentiation into (1) a high density refuse fraction containing the major portion of non-coal mineral products and sulfur, (2) a lowest density fraction of low sulfur content and (3) a middlings fraction of intermediate sulfur and ash content. The refuse fraction (1) is gasified by partial combustion producing a crude gas product from which a hydrogen stream is separated for use in hydrogenative liquefaction of the middlings fraction (3). The lowest density fraction (2) is mixed with the liquefied coal product to provide the desired fuel slurry. Preferably there is also separately recovered from the coal liquefaction LPG and pipeline gas.
- Research Organization:
- International Coal Refining Company, Allentown, PA (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC05-78OR03054
- Assignee:
- International Coal Refining Company (Allentown, PA)
- Patent Number(s):
- 4,392,940
- Application Number:
- 06/252690
- OSTI ID:
- 864618
- Country of Publication:
- United States
- Language:
- English
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