Coal: liquefaction
Low-sulfur, low-ash liquid fuels for power plants have advantages over gases in that they can be manufactured and stockpiled and then distributed according to demand. Solvent-refined coal made by the SRC process can be used either as a liquid or solid. In the SRC process coal is mixed with a liquid solvent, itself derived from the coal, then heated and passed (with additional hydrogen) to a high pressure reactor. Hydrogen and hydrogen sulfide are then separated from the mixture, it is filtered, the solvent is distilled for reuse, and the final product is recovered either as liquid or solid. Some of the sulfur-containing compounds are removed as hydrogen sulfide. The remaining inorganic sulfur and other extraneous minerals are taken out during filtration. The result is a low-sulfur (0.5 percent), low-ash (0.1 percent) fuel for power plants. Research programs are discussed briefly: mathematical models of the process, fundamental chemistry, study of cost-controlling steps, foam flotation or filtration separation of ash and effects of coal types. (LTN)
- OSTI ID:
- 7127476
- Journal Information:
- Mosaic; (United States), Vol. 5:2
- Country of Publication:
- United States
- Language:
- English
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