Studies of coal structure using carbene chemistry
The object of this grant was to react coal, derivatized forms of coal, and solvent swelled coal with carbenes (divalent carbon species) under mild conditions. These carbenes were to be prepared by treating the coal with several diazo compounds and then thermally decomposing them at relatively low temperatures (80--130{degree}C). The carbenes were to be chosen to show varying selectively toward aromatic rings containing heteroatom functionalities and toward polynuclear aromatic systems. In some instances, where selectivities toward aromatic and heteroaromatic ring systems were not known, model studies were to be carried out. Because of the generally mild conditions employed and the good selectivity anticipated, and actually observed with one particular system, it was expected that this methodology would provide structural information about the coal, along with data on the extent of occurrence and type of aromatic systems. After carbene reactions, treatment of the coal samples was to include extractions and thermolysis. Physical studies included thermogravimetric analysis, diffuse reflectance FT-IR spectroscopy, NMR ({sup 1}H and {sup 13}C) spectroscopy, gas chromatography, GC/MS and GC/FT-IR. 7 figs., 10 tabs.
- Research Organization:
- Texas Univ., Arlington, TX (USA). Dept. of Chemistry
- Sponsoring Organization:
- DOE/FE
- DOE Contract Number:
- FG22-86PC90532
- OSTI ID:
- 6581211
- Report Number(s):
- DOE/PC/90532-15; ON: DE91000590
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CARBENES
CHEMICAL REACTIONS
COAL
MOLECULAR STRUCTURE
DECOMPOSITION
PROGRESS REPORT
SPECIFICITY
STRUCTURAL CHEMICAL ANALYSIS
CARBONACEOUS MATERIALS
DOCUMENT TYPES
ENERGY SOURCES
FOSSIL FUELS
FUELS
MATERIALS
RADICALS
010600* - Coal
Lignite
& Peat- Properties & Composition