New reagents for coal desulfurization
- Eastern Illinois Univ., Charleston, IL (USA)
In this project, possible new reagents and reactions to remove organic sulfur from coal are being evaluated. Reagent screening and development reactions utilize substitute thiophenes plus aryl and alkyl sulfides as the initial models for organic sulfur compounds in coal. The organosulfur compounds in solvent extracts of Illinois coals will serve as second generation models for the organic sulfur found in coal. The reagent formed by sodium borohydride reduction of nickel chloride in ethanol nickel boride'' was shown to convert several organic sulfur compounds to the corresponding hydrocarbon at 50--78{degree}C, 1 atmosphere pressure within 2 hours. To date the best conversion is a 31% conversion of dibezothiophene (DBT) to biphenyl. Benzothiophene, benzyl sulfide, and octyl sulfide are all desulfurized to lesser extents although reactions have not been optimized in terms of temperature or reagents. Possible soluble reagents based on this system and other nickel salts are under investigation. The partial reduction product form DBT, 2-phenylthiophenol, is formed in addition to biphenyl when DBT is reduced with Ni/Al alloy and NaOH or with K/THF and electron transfer agents. An authentic sample of this thiol was synthesized for identification and use in future desulfurization reactions. 7 refs., 3 tabs.
- Research Organization:
- Illinois Dept. of Energy and Natural Resources, Springfield, IL (USA)
- Sponsoring Organization:
- DOE; ILDENR; USDOE, Washington, DC (USA); Illinois Dept. of Energy and Natural Resources, Springfield, IL (USA)
- DOE Contract Number:
- FG22-90PC90176
- OSTI ID:
- 5792249
- Report Number(s):
- DOE/PC/90176-T27; ON: DE91014047
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
010402* -- Coal
Lignite
& Peat-- Purification & Upgrading
ALKALI METAL COMPOUNDS
ALLOYS
ALUMINIUM ALLOYS
BORON COMPOUNDS
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHEMICAL REACTIONS
COAL
DESULFURIZATION
DOCUMENT TYPES
ELECTRON TRANSFER
ENERGY SOURCES
FOSSIL FUELS
FUELS
HETEROCYCLIC COMPOUNDS
HYDRIDES
HYDROGEN COMPOUNDS
IRON COMPOUNDS
IRON SULFIDES
MATERIALS
NICKEL ALLOYS
NICKEL COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
PROGRESS REPORT
SALTS
SODIUM COMPOUNDS
SULFIDES
SULFUR COMPOUNDS
THIONAPHTHENES
TRANSITION ELEMENT COMPOUNDS