Novel mechanisms in aqueous liquefaction: Final report
Three pairs of model compounds were proposed for use in a mechanistic study to evaluate the importance of possible ionic mechanisms when supercritical water is used as a medium for coal liquefaction. The syntheses of the Group I ethers: 2-benzyloxynaphthalene, 2-phenoxymethylnaphthalene, and 2-naphthylmethyl benzyl ether were completed using a modification of the Williamson ether synthesis which utilized sodium hydride as a base, and dimethylformamide solvent. Model compounds benzyl phenyl ether (BPE) and hydroquinone monobenzylether (HQMBE) were reacted in supercrital water and deuterium oxide. The observed reactions with BPE were dominated by autooxidation reactions involving molecular oxygen unpurged from the reactor. Exchange was noted only with the product, phenol. The HQMBE reactions exhibited both homolysis and autooxidation pathways. No exchange was observed in any of the HQMBE products. These results do not support the concept of supercritical water being an important reactant under liquefaction conditions.
- Research Organization:
- Colorado Univ., Denver (USA). Dept. of Chemistry
- DOE Contract Number:
- FG22-85PC81544
- OSTI ID:
- 6535403
- Report Number(s):
- DOE/PC/81544-T1; ON: DE87007378
- Resource Relation:
- Other Information: Portions of this document are illegible in microfiche products. Original copy available until stock is exhausted
- Country of Publication:
- United States
- Language:
- English
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CHEMICAL BONDS
CLEAVAGE
COAL
SUPERCRITICAL GAS EXTRACTION
ETHERS
SYNTHESIS
WATER
SUPERCRITICAL STATE
MOLECULAR STRUCTURE
STRUCTURAL MODELS
CARBONACEOUS MATERIALS
CRYSTAL STRUCTURE
ENERGY SOURCES
EXTRACTION
FOSSIL FUELS
FUELS
HYDROGEN COMPOUNDS
MATERIALS
MICROSTRUCTURE
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
OXYGEN COMPOUNDS
SEPARATION PROCESSES
SOLVENT EXTRACTION
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