Characterization of oxidized coal surfaces: Quarterly report, May 1987-July 1987
Work has progressed in the areas of (1) exploration or derivatization reactions for ambient temperature in-situ derivatization of aldehydes, ketones, and phenols on carbon surfaces; (2) analysis of these derivatives by secondary ion mass spectrometry (SIMS) and laser mass spectrometry (LMS); (3) derivatization and analysis of a naturally weathered coal; (4) construction of a reactor for controlled low temperature oxidation of coal; and (5) design of a protocol for handling coal samples. Specific derivatization reactions studied in this period included reactions of Girard's reagent, 2,4-dinitrophenylhydrazine and bisulfite with aldehydes and ketones and 4-triethylammonium-2-butene (TAB), trimethylsilyl ethers (TMS) and dimethylsilyl ethers (DMS) with phenols and alcohols. Positive ion SIMS analysis of Girard's reagent derivatives and TAB derivatives on a silver support yielded molecular ion species (e.g., cations from the salts) for a wide range of carbonyl and phenolic compounds, respectively. Comparison of negative ion LMS spectra of naturally weathered Illinois No. 6 coal before and after treatment with 2,4-dinitrophenylhydrazine reveals the presence of two high mass ions in the spectrum of treated coal that are not present in the spectra of either the untreated coal or the derivatizing reagent. This provides both evidence for carbonyl functionality on the surface of naturally weathered Illinois No. 6 coal and support for the feasibility of in-situ derivatization and analysis of organic components in the coal matrix. 5 refs.
- Research Organization:
- Pittsburgh Univ., PA (USA). Dept. of Chemistry
- DOE Contract Number:
- FG22-86PC90527
- OSTI ID:
- 6316034
- Report Number(s):
- DOE/PC/90527-T3; ON: DE87013089
- Resource Relation:
- Other Information: Portions of this document are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
Similar Records
Characterization of oxidized coal surfaces: Quarterly report, August 1987-October 1987
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Related Subjects
ALCOHOLS
DERIVATIZATION
ALDEHYDES
CARBOXYLIC ACIDS
COAL
OXIDATION
KETONES
PHENOLS
MASS SPECTROSCOPY
AROMATICS
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
ENERGY SOURCES
FOSSIL FUELS
FUELS
HYDROXY COMPOUNDS
MATERIALS
ORGANIC ACIDS
ORGANIC COMPOUNDS
SPECTROSCOPY
010600* - Coal
Lignite
& Peat- Properties & Composition