Application of unconventional solvents and /sup 152/Cf-plasma desorption spectrometry in studies of coal. Annual report Feb 83-Jan 84

Technical Report · Thu Mar 01 04:00:00 EST 1984

OSTI ID:6653984

Zoeller, Jr, J H

Californium-252 plasma desorption mass spectrometry (CFPDMS) studies of chloroform extracts of coals yield rich spectra. Ion peak patterns seen in both positive and negative ion spectra strongly indicate families of homologous phenols in the range 800-1200 amu. This conclusion is drawn from the CFPDMS spectra of several pure organic compounds, including carboxylic acids, phenols, alkylbenzenes, and polynuclear aromatic hydrocarbons. Most of the spectra can be interpreted in rational structural terms, involving interesting fragmentation mechanisms. Asphaltenes display periodic ion groups resembling those of the hydroaromatic compound tetrahydropyrene. Heavy carbonaceous ions (1000-2000 amu) are seen in only monoalkylbenzenes and certain coal fractions. Light carbonium ions and polycarbon ions are substrate-dependent pyrolytic artifacts. DMSO extracts of lignite can be separated into solvent fractions, but they yield unsatisfactory spectra. Results promise that subfractionation will ultimately reveal structural detail on a variety of high molecular weight coal molecules.

• Research Organization: Texas A and M Univ., College Station (USA). Dept. of Chemistry
• OSTI ID: 6653984
• Report Number(s): PB-84-198522
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010600* -- Coal
Lignite
& Peat-- Properties & Composition
ACTINIDE ISOTOPES
ACTINIDE NUCLEI
ALPHA DECAY RADIOISOTOPES
AROMATICS
CALIFORNIUM 252
CALIFORNIUM ISOTOPES
CARBONACEOUS MATERIALS
CARBOXYLIC ACIDS
CHEMICAL ANALYSIS
COAL
COAL EXTRACTS
ENERGY SOURCES
EVEN-EVEN NUCLEI
FOSSIL FUELS
FUELS
HEAVY NUCLEI
HYDROXY COMPOUNDS
ISOTOPES
MASS SPECTROSCOPY
MATERIALS
MOLECULAR STRUCTURE
MOLECULAR WEIGHT
NUCLEI
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC SOLVENTS
PHENOLS
RADIOISOTOPES
SOLVENTS
SPECTROSCOPY
YEARS LIVING RADIOISOTOPES