New reagents for coal desulfurization
In this project, possible new reagents and reactions to remove organic sulfur from coal are being evaluated. For this exploratory study the authors are attempting to modify mild desulfurization reactions, shown to work with simple organosulfur compounds, to improve sulfur removal and reduce reagent cost. Reagent screening and development reactions utilize substituted 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. Ultimately, the most successful reagents will be tested on demineralized and whole coal samples. The goal of the project is development low-cost reagents capable of pre-combustion desulfurization of Illinois coal. During the first quarter, standard test methods were developed for reagent screening, base-line desulfurization reactions from the literature were run and several metal complexes were synthesized as staring materials for new reagents. Exploratory desulfurization reactions with the reagent formed by borohydride reduction of nickel chloride showed it capable of desulfurizing a variety of substituted thiophenes and sulfides under mild conditions. Future activities will seek to modify this and other systems to use simple or more easily regenerated reagents. 9 refs., 1 tab.
- Research Organization:
- Illinois Dept. of Energy and Natural Resources, Springfield, IL (USA)
- Sponsoring Organization:
- DOE; USDOE, Washington, DC (USA)
- DOE Contract Number:
- FG22-90PC90176
- OSTI ID:
- 5993868
- Report Number(s):
- DOE/PC/90176-T1; ON: DE91010500
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
010402* -- Coal
Lignite
& Peat-- Purification & Upgrading
BITUMINOUS COAL
BLACK COAL
BORIDES
BORON COMPOUNDS
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHEMICAL REACTIONS
COAL
COAL EXTRACTS
COAL PREPARATION
COST
DEMINERALIZATION
DESULFURIZATION
DOCUMENT TYPES
ENERGY SOURCES
EXTRACTION
FOSSIL FUELS
FUELS
HETEROCYCLIC COMPOUNDS
MATERIALS
MEASURING METHODS
NICKEL BORIDES
NICKEL COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
PERFORMANCE
POLYCYCLIC SULFUR HETEROCYCLES
PROGRESS REPORT
REAGENTS
REMOVAL
SEPARATION PROCESSES
SOLVENT EXTRACTION
SULFIDES
SULFUR COMPOUNDS
TRANSITION ELEMENT COMPOUNDS