References
- Fullerton , K. L. , Lee , S. , Kulik C. J. , 1991 . Process Engineering Studies of the Perchloroethylene Coal Cleaning Process , Fuel Sci. and Tech. Int'l , 9 ( 7 ), 873 – 888 .
- Lee , S. , Kesavan , S. K. , Lee , B. G. , and Ghosh , A. , 1989a . Removal of Organic Sulfur from Coal , Proceedings of Thirteenth Annual EPRI Conference of Fuel Science and Conversion , EPRI GS-6219 , 1 , January , 1 – 21 .
- Lee , S. , Kesavan , S. K. , Lee , B. G. , Ghosh , A. , and Kulik , C.J. , 1989b . Selective Removal of Organic Sulfur from Coal by Perchloroethylene Extraction , Fuel Science and Technology International , 1 ( 4 ), 1989a , 443 – 468 .
- Lee , S. , Fullerton , K. L. , Kesavan , S. K. , Parameswaran , V. R. , Lee , B.G. , 1990 . The Perchloroethylene Refining Process of High Sulfur Coals , Proceedings of Fourteenth Annual EPRI Conference of Fuel Science and Conversion , Palo Alto , CA .
- Lee , S. , Leehe , H. H. , Kulik , C. J. and Lebowitz , H. , 1990 , Patent Disclosure filed with Electric Power Research Institute .
- Lee , S. , Fullerton , K. L. , Vishnubhatt , P. , 1991 . Updates of Perchloroethylene Coal Extraction Process Development , Proceedings of.Sixteenth Annual EPRI Conference on Fuel Science , EPRI , Palo Alto , CA , in press 1991 .
- Leehe , H.H. and Lee , S. , 1989a . Removal of Organic Sulfur from Coal . Engineering Foundation Conference o Advanced Upgrading of Coal , Santa Barbara , CA ,
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- Starbuck , A.E. , 1980 . U.S. Patent 4,213,793/Leehe, Re 32,454, 1983 .
- The perchloroethylene extraction process has proven to be an effective pre-combustion coal desulfurization process which offers a complete process package including wet grinding, organic sulfur removal, pyrite and mineral matter separation, solvent recovery, and by products and sulfur recovery. In this paper, coal weatherability was investigated for various Midwestern and Eastern U.S. coals, and its effect on organosulfur extractability by the perchloroethylene process was identified. Both “natural” and “artificial” weathering of these coals were experimentally investigated. A statistically significant difference in the extraction efficiency between fresh and weathered coals vas observed. A strong relation between the extractability and degree of weathering of the coal was established. The results provide a valuable insight into the process engineering of this process.