VHF EPR determination of the chemical forms of organic sulfur in coal
Very High Frequency Electron Paramagnetic Resonance (VHF EPR) spectroscopy has demonstrated the ability to observe organic sulfur in coal. We have constructed a unique VHF EPR instrument operating at the W-band (96 GHz), one of only four 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 a 250 GHz 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 has focused on three main areas: (1) synthesis and analysis of model system for thiophenic sulfur species in coal; (ii) 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; (iii) VHF EPR of iodinated coal. 1 ref., 8 figs.
- Research Organization:
- Illinois Univ., Urbana, 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:
- 5539635
- Report Number(s):
- DOE/PC/90176-T18; ON: DE91014056
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
010600* -- Coal
Lignite
& Peat-- Properties & Composition
BITUMINOUS COAL
BLACK COAL
CARBONACEOUS MATERIALS
COAL
DESIGN
DOCUMENT TYPES
ENERGY SOURCES
FOSSIL FUELS
FUELS
HETEROCYCLIC COMPOUNDS
MACERALS
MAGNETISM
MATERIALS
MEASURING INSTRUMENTS
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
PARAMAGNETISM
PROGRESS REPORT
SPECTRA
SPECTROMETERS
THIOPHENE