Abstract
Three fractions from a SRC-II coal liquefaction process, two naphthas from Illinois No. 6 coal and Wyodak coal using the Exxon Donor Solvent liquefaction process, and three fractions from tar sands extract were characterized for physical and chemical properties. Selected samples of syncrudes were stored at 43 °C for 32 weeks in air. The tar sands materials more closely resembled the properties of present petroleum-based materials, whereas the coal-derived liquids from the SRC-II process demonstrated the need for considerable upgrading. Heavier fractions seemed to undergo polymerization to produce gums, whereas lighter fractions deteriorated via oxidation.
Published Version
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