Abstract
Yubarishinko coal-derived neutral oil was separated into compound class fractions, alkanes (Fr-P), monoaromatics (Fr-M), diaromatics (Fr-D) and tri- and/or tetra-aromatics (Fr-T), by high performance liquid chromatography (h.p.l.c.). The compound type analyses of aromatic compound class fractions were performed using a gas chromatograph/mass spectrometer. Based on h.p.l.c. separation behaviour and the compound type analyses according to Z number by mass spectroscopy (m.s.), aromatic fractions in a neutral oil were characterized in terms of three chemical structural parameters: the number of aromatic rings; the number of naphthenic rings; and the number of alkyl side chain carbons attached to these rings. Converting gas chromatography (g.c.) retention time into boiling point, the boiling point distributions of aromatic hydrocarbon compound types were clarified and the variations in chemical structure with boiling point are discussed in terms of their chemical structural parameters.
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