IDENTIFICATION OF ORGANIC SULFUR-COMPOUNDS IN SUPERCRITICAL EXTRACTS OF BEYPAZARI LIGNITE USING DECONVOLUTED DIFFERENTIAL-PULSE POLAROGRAMS

The objective of this study was the identification of sulfur compounds present in the supercritical ethanol/NaOH extracts of Beypazari ligni te by deconvoluting the polarograms of the chromatographically separat ed fractions of the extracts. Supercritical interaction between coal a nd ethanol/NaOH was carried out using a microreactor of 15 mL capacity . Liquid products obtained were separated by silica gel liquid chromat ography. Differential pulse polarograms of the fractions separated wer e measured, and the least squares curve fitting techniques were applie d to resolve the overlapping bands in the polarograms of the lignite l iquids. Identified compounds in the fractions were fluoranthene, 9,10- diphenylanthracene, anthracene, dibenzyl disulfide, chrysene, thiophen ol, phenanthrene, dibenzothiophene, and dimethyldibenzothiophene.