Spin-mapping of coal structures with ESE and ENDOR
Advanced EPR methods have demonstrated cability for study of molecular components (including organic sulfur) in coal. We have constructed a unique Very High Frequency Electron Paramagnetic Resonance (VHF EPR) instrument operating at the W-band (96 GHz), one of only two such instruments in the world, and the only one studying coal. We are employing this instrument, as well as collaborating with scientists at Cornell University who have constructed a 250 GHz EPR spectrometer, to develop a clearer understanding of the relationships between the VHF EPR spectra we observe from Illinois coal and the organic sulfur species present in it. Work this Quarter for this DOE grant (supplemented by a one-year award through the Illinois Center for Research on Sulfur in Coal and also reported to that agency) has focussed on three main area: (1) synthesis and analysis of model systems for thiophenic sulfur species in coal; (2) Electron Spin Echo and VHF EPR of inertinites from an Illinois {number sign}6 coal, as well as evaluation of the sensitivity of the signals from this maceral to oxygen; (3) VHF EPR of iodinated coals. 1 ref., 8 figs.
- Research Organization:
- Illinois Univ., Urbana, IL (United States)
- Sponsoring Organization:
- DOE; USDOE, Washington, DC (United States)
- DOE Contract Number:
- FG22-88PC88921
- OSTI ID:
- 5370050
- Report Number(s):
- DOE/PC/88921-10; ON: DE92000295
- Country of Publication:
- United States
- Language:
- English
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VHF EPR determination of the chemical forms of organic sulfur in coal
Spin-mapping of coal structures with ESE and ENDOR
Related Subjects
010600* -- Coal
Lignite
& Peat-- Properties & Composition
656002 -- Condensed Matter Physics-- General Techniques in Condensed Matter-- (1987-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANGULAR MOMENTUM
AROMATICS
BITUMINOUS COAL
BLACK COAL
BORIC ACID
BORON COMPOUNDS
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHEMICAL REACTIONS
COAL
COUPLING
DECOMPOSITION
DESULFURIZATION
DOCUMENT TYPES
ELECTRON SPIN RESONANCE
ELEMENTS
ENDOR
ENERGY SOURCES
EQUATIONS
EQUATIONS OF STATE
EXTRACTION
FOSSIL FUELS
FUELS
HALOGENS
HETEROCYCLIC COMPOUNDS
HYDROGEN COMPOUNDS
ILLINOIS BASIN
INORGANIC ACIDS
IODINE
MACERALS
MAGNETIC RESONANCE
MATERIALS
MATHEMATICAL MODELS
MEASURING INSTRUMENTS
MOLECULAR STRUCTURE
NONMETALS
ORBITAL ANGULAR MOMENTUM
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
OXIDES
OXYGEN
OXYGEN COMPOUNDS
PROGRESS REPORT
PYROLYSIS
RESONANCE
SEPARATION PROCESSES
SOLVENT EXTRACTION
SPECTROSCOPY
STRUCTURAL CHEMICAL ANALYSIS
SULFUR COMPOUNDS
SULFUR OXIDES
THERMOCHEMICAL PROCESSES
THIONAPHTHENES
THIOPHENE