Spin-mapping of coal structures with ESE and ENDOR
The broad goals of this project are to determine by nondestructive means -- magnetic resonance techniques -- aspects of chemical and physical structures of organic parts of native and treated coals. We also hope to use related methods to follow the course of certain coal cleaning processes with microscopic spatial resolution. Specific goals include: the nondestructive determination of atomic and molecular structure of sulfur-containing organic species in coal both in its natural state and at various stages during desulfurization; determination of interatomic distances, numbers, and orientations in individual macerals with differing sulfur content by pulsed EPR microscopy; development of nondestructive high-resolution microscopic images of internal structure in coal, including chemical information on the location and distribution of sulfur-containing compounds; determination of sulfur compound chemical structure from highly localized regions in a whole coal sample; by means of the techniques used to accomplish the above goals, to measure the effects of various coal cleaning methods on the molecular forms and spatial distribution of organic sulfur, and on internal structural characteristics like pore size and maceral density; following by these microscopic methods the rate and extent of solvent intrusion into the pores and matrix of whole coals and separated macerals. The work carried out this year mainly addressed goals 1, 2, 3, and 6. 24 refs., 18 figs.
- Research Organization:
- Illinois Univ., Urbana, IL (USA)
- Sponsoring Organization:
- DOE/FE
- DOE Contract Number:
- FG22-88PC88921
- OSTI ID:
- 6501197
- Report Number(s):
- DOE/PC/88921-4; ON: DE91004344
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
COAL
MOLECULAR STRUCTURE
MACERALS
AROMATICS
ELECTRONIC STRUCTURE
ENDOR
IMAGE PROCESSING
ORGANIC SULFUR COMPOUNDS
PROGRESS REPORT
SPECTRA
SPECTROSCOPY
VITRINITE
CARBONACEOUS MATERIALS
DOCUMENT TYPES
ENERGY SOURCES
FOSSIL FUELS
FUELS
MAGNETIC RESONANCE
MATERIALS
ORGANIC COMPOUNDS
PROCESSING
RESONANCE
010600* - Coal
Lignite
& Peat- Properties & Composition
656002 - Condensed Matter Physics- General Techniques in Condensed Matter- (1987-)