Thermodynamics of the transformations of oxygen- and sulphur-containing functional groups during coal liquefaction in hydrogen and hydrogen donor
✍ Scribed by Lance Messenger; Amir Attar
- Publisher
- Elsevier Science
- Year
- 1979
- Tongue
- English
- Weight
- 713 KB
- Volume
- 58
- Category
- Article
- ISSN
- 0016-2361
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✦ Synopsis
The thermodynamic equilibrium constants for the reduction of oxygen and sulphur functional groups in hydrogen and in tetralin were calculated for the temperature range 327-527°C.
All the reduction reactions of the oxygen groups are thermodynamically favourable both with hydrogen and with tetralin. The reduction reactions of all the sulphur functional groups in tetralin are favourable except for the reductions of thiophenes below 407°C. However, molecular hydrogen cannot reduce thiophenes or aryl sulphides below about 59O'C. Reactions in which oxygen from water is captured by the organic matrix are not favourable reactions; however, capturing of sulphur from hydrogen sulphide or alkyl thiols can occur in this range of temperatures. The most stable products are condensed thiophenic structures.