Supercritical gas extraction of coal with hydrogen-donor solvents

An investigation of the effect of a hydrogen-donor component in the solvent used for supercritical gas extraction was undertaken. Extraction of three Australian coals with toluene, with decalin and with these solvents containing small amounts of tetralin was investigated. There was a significant imp...

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Bibliographic Details
Published in:Fuel (Guildford) 1984-01, Vol.63 (8), p.1174-1177
Main Authors: Kershaw, John R., Overbeek, John M.
Format: Article
Language:English
Subjects:
Applied sciences
coal
Energy
Exact sciences and technology
Fuel processing. Carbochemistry and petrochemistry
Fuels
liquefaction
Solid fuel processing (coal, coke, brown coal, peat, wood, etc.)
supercritical gas extraction
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Summary:An investigation of the effect of a hydrogen-donor component in the solvent used for supercritical gas extraction was undertaken. Extraction of three Australian coals with toluene, with decalin and with these solvents containing small amounts of tetralin was investigated. There was a significant improvement in conversion by addition of 5% tetralin to the solvent. Other hydrogen donors were also effective. The improvement in conversion was shown to be due to hydrogen donation rather than to a change in the physical properties of the solvent. The increase in conversion was greater for a brown coal than for a bituminous coal of the same hydrogen to carbon atomic ratio. The pre-asphaltene content of the extract increased with conversion.
ISSN:0016-2361
1873-7153
DOI:10.1016/0016-2361(84)90207-2