Abstract
Four components, namely, saturates, aromatics, resins and asphaltenes, in upgraded coal-derived liquids were determined by thin-layer chromatography combined with flame-ionization detection (t.l.c./FID method). The results agree with previous results using various analytical methods. The t.l.c./FID method was found to be a simple and effective method for screening of hydroconversion catalysts and also for a follow-up investigation of the chemical changes of coal-derived liquids during the hydroconversion process.
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