SUPERCRITICAL FLUID EXTRACTION OF TURKISH LIGNITES AND OIL SHALE WITH TOLUENE MIXTURES
- 1 January 1994
- journal article
- research article
- Published by Taylor & Francis in Fuel Science and Technology International
- Vol. 12 (6) , 947-960
- https://doi.org/10.1080/08843759408916215
Abstract
Supercritical -Fluid extraction (SFE) of two Turkish lignites and oil shale with toluene mixtures were investigated. Experiments were performed in a batch autoclave at 623 K. Extracts recovered from SFE were fractionated into oils, asphaltenes and preasphal-tenes by solvent extraction. The conversion of lignites decreased with increasing n-pentane content in the mixture. The extraction yield and the products (oils, AS, PAS) increased with increasing n-pentane content in its range below 15 % The conversion and the extract yield obtained from Cöynük ail shale is higher with toluene mixture than toluene.Keywords
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