Heteroatom containing organics during liquefaction, 7/1/87-7/1/88
Coal liquefaction products are difficult to observe in realistic solvents due to solvent masking. Deuteration of the solvent makes individual solvent components uniquely different from unlabelled coal-derived products. Products from the coal can be observed as well as changes in the solvent proton positions in complex solutions. This enables obtaining mechanistic information concerning hydrogen shuttling by known hydrogen donors, and concerning selected compounds which are known to be produced from coal and may be active in liquefaction. Knowledge of the reaction mechanisms will enable the fine-tuning of liquefaction processes to increase the valuable product yields which will improve process economics. The goal of this research is to investigate the fate of heteroatom-containing compounds during low-rank coal liquefaction under mild (less than 350/sup 0/C) conditions. Comparison of thermal and supercritically extracted products indicates that the coal products observed at 160/sup 0/C and 250/sup 0/C are due to devolatilization. Thermal products were observed at 300/sup 0/C and 350/sup 0/C. GC-MS analysis of liquefaction products after reaction in deuterated solvent shows the production of simple phenolics and tetralin. Both GC-MS and NMR data indicate that the bridge proton exchange of acenaphthene and fluorene in the original solvent are relatively high during processing. 5 refs.
- Research Organization:
- North Dakota Univ., Grand Forks (USA). Energy and Mineral Research Center
- DOE Contract Number:
- FG22-86PC90911
- OSTI ID:
- 6259373
- Report Number(s):
- DOE/PC/90911-8; ON: DE87014993
- Resource Relation:
- Other Information: Portions of this document are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
Similar Records
Reactivity of heteroatom-containing organics during liquefaction of subbituminous coal: Quarterly technical progress report, December 15, 1986-March 15, 1987
Coal liquefaction using deuterium-labeled anthracene oil solvent
Related Subjects
COAL
DEVOLATILIZATION
PYROLYSIS
COAL LIQUEFACTION
CHEMICAL REACTIONS
LABELLED COMPOUNDS
ORGANIC SOLVENTS
DEUTERATION
ANISOLE
CARBON 13
COAL EXTRACTS
GAS CHROMATOGRAPHY
HETEROCYCLIC COMPOUNDS
ISOTOPIC EXCHANGE
LIGNITE
MASS SPECTROSCOPY
NITROUS OXIDE
NUCLEAR MAGNETIC RESONANCE
PHENOLS
PYROCATECHOL
PYROLYSIS PRODUCTS
SUBBITUMINOUS COAL
SUPERCRITICAL GAS EXTRACTION
TEMPERATURE DEPENDENCE
THERMAL GRAVIMETRIC ANALYSIS
AROMATICS
BROWN COAL
CARBON ISOTOPES
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHEMICAL ANALYSIS
CHROMATOGRAPHY
DECOMPOSITION
DEVELOPERS
ENERGY SOURCES
ETHERS
EVEN-ODD NUCLEI
EXTRACTION
FOSSIL FUELS
FUELS
GRAVIMETRIC ANALYSIS
HYDROXY COMPOUNDS
ISOTOPES
LIGHT NUCLEI
LIQUEFACTION
MAGNETIC RESONANCE
MATERIALS
NITROGEN COMPOUNDS
NITROGEN OXIDES
NUCLEI
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
POLYPHENOLS
QUANTITATIVE CHEMICAL ANALYSIS
RESONANCE
SEPARATION PROCESSES
SOLVENT EXTRACTION
SOLVENTS
SPECTROSCOPY
STABLE ISOTOPES
THERMAL ANALYSIS
THERMOCHEMICAL PROCESSES
010405* - Coal
Lignite
& Peat- Hydrogenation & Liquefaction