Sulfur removal from high-sulfur Illinois coal by low-temperature perchloroethylene (PCE) extraction. Final technical report, September 1, 1991--August 31, 1992
- Illinois State Geological Survey, Champaign, IL (United States)
- Eastern Illinois Univ., Charleston, IL (United States); and others
The purposes of this Testing and Materials (ASTM) forms of sulfur analysis. The purposes of this research are to independently confirm and possibly to improve the organic sulfur removal from Illinois coals with the PCE desulfurization process and to verify the forms-of-sulfur determination using the ASTM method for the PCE process evaluation. Problem that limits commercial application of the PCE process is the high chlorine content in the PCE-treated coals. Hence, to develop a dechlorination procedure to remove excess PCE from the PCE-treated coal is an additional goal of this investigation. MWOPC`s results have been repeated on fresh IBC-104 coal. Oxidation of coals was found to affect subsequent PCE desulfurization. Elemental sulfur is more amenable to removal by PCE. Ohio 5/6 coal appears to produce elemental sulfur more readily than Illinois coal during oxidation. Data from X-Ray Diffraction spectroscopy indicate that sulfate in the oxidized Illinois IBC-104 coal is mainly in gypsum form, whereas, sulfate in oxidized Ohio 5/6 sample is mainly in szomolnokite form. These data suggest that the oxidation reaction for Ohio 5/6 coal might occur under catalytic conditions which readily convert pyrite to produce FeSO{sub 4} and elemental sulfur. The higher elemental sulfur content in that coal results in higher ASTM organic sulfur removal by PCE extraction. From mass balance calculation, 96% of the total sulfur and greater than 95% of total iron were accounted for during our PCE tests with both long-term ambient-oxidized IBC-104 coal and ambient-oxidized Ohio 516 coal.
- Research Organization:
- Illinois Dept. of Energy and Natural Resources, Springfield, IL (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States); Illinois Dept. of Energy and Natural Resources, Springfield, IL (United States)
- DOE Contract Number:
- FG22-91PC91334
- OSTI ID:
- 10117810
- Report Number(s):
- DOE/PC/91334-128; ON: DE94005729; BR: AV0100000
- Resource Relation:
- Other Information: PBD: [1992]
- Country of Publication:
- United States
- Language:
- English
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Sulfur removal from high-sulfur Illinois coal by low-temperature perchloroethylene (PCE) extraction
Sulfur removal from high-sulfur Illinois coal by low-temperature perchloroethylene (PCE) extraction. Technical report, September 1, 1991--November 30, 1991