Analysis and identification of oxygen compounds in longkou shale oil and Shenmu coal tar

Abstract

Methods of acid-base separation and extrography were used to decompose shale oil of Longkou oil shale (LSO), Shandong province, and coal tar of Shenmu coal (SCT), Shanxi province, both China, into acid, base and neutral fractions. The molecular structure and mass distribution of the oxygen compounds present in LSO and SCT were investigated using gas chromatography-mass spectrometry (GC-MS) and negative-ion electrospray ionization Fourier transform ion cyclotron resonance mass spectrometry (ESI FT-ICR MS). The results of GC-MS showed that oxygen compounds in the acid fractions of LSO and SCT were phenols, indanols, naphthols, phenylphenols, fluorenols and phenanthrenols, and their derivatives, while oxygen compounds in neutral fractions 4 and 5 were aliphatic ketones, esters and minor aromatic ketones. The results of ESI FT-ICR MS demonstrated that in LSO, O1, O2, O3, N1O1, N1O2, N1and N2 compounds were determined with O1 and O2 compounds as the most abundant. SCT contained O1, O2, O3, O4, O5 and O6 compounds, while O2 and O3 compounds dominated. © 2012 Estonian Academy Publishers.