LAUSR

Composition analysis of coal tar remains a challenging task because of its complex components. In this paper, the compositions of low temperature coal tar (LTCT) and the wash oil fraction of high temperature coal tar (HTCT) were studied. A thermogravimetric analyzer (TG) combined with gas chromatography–mass spectrometry (GC/MS) with the same temperature program was put forward to analyze the quantitative determination of the GC/MS analyzable part of coal tar, and the composition and distribution of the GC/MS unanalyzable part (300LTCT and 300HTCT obtained from TG at the final temperature of 300 °C) was investigated by a pyrolysis gas chromatography–mass spectrometer (Py-GC/MS). Results reveal that light compositions can be extracted by petroleum ether (PE) more effectively than heavy compositions. PE soluble fractions of LTCT and HTCT cannot be totally gasified by GC/MS, and the remaining parts at above 300 °C are 6.51 wt % and 4.99 wt %, respectively. GC/MS combined with TG can accurately analyze the co...