Determination of Components in Fraction of C₇~C₉ of the Coal-Liquefied and Hydrogenated Oil by GC-MS in Combination with the Method of Live Database

Components with C7-C9 in fractions of oil prepared by direct coal liquefaction and hydrogenation were separated and analyzed by the central-cutting 2D gas chromatography using the PONA chromatographic column as 1D priliminary analytical column with FID, and the DB-35MS column as 2D analytical column which is connected with MS; and combining with application of method of live database and searching of MS database, 60 compounds were identified. The results of the identification were further verified by the regularities of retention of hydrocarbons on the PONA column and by referring to standard materials. Quantification analysis of components with various carbon numbers and grouping of various hydrocarbons were carried out by the area normalization. It was shown that relative contents of compounds with C8 and C9 were found to be 32.3% and 51.7% respectively, and that the main groups of hydrocarbons found were cyclic hydrocarbons (77.3%) and alkanes with normal structures (9.63%).