Chromatographic Methods of Investigation of Hydrocarbon Composition of Diesel Fuels

摘要

The group hydrocarbon composition of base summer diesel fuels of various Russian refineries was investigated using methods of gas and high performance liquid chromatography. It is shown that the experimental data obtained by these methods, precisely pertaining to the content of normal paraffins and the total content of paraffinic-naphthenic and aromatic hydrocarbons, do not provide sufficient information for predicting physicochemical and performance properties of diesel fuels. For a more detailed study of the hydrocarbon composition of diesel fuels, use was made of the method of two-dimensional gas chromato-mass spectrometry, which made it possible to determine the ratio of normal and isoalkanes and the content of mono-, bi- and polycyclic naphthenic and aromatic hydrocarbons and to explain the differences between hydrocarbon compositions of fuels with similar performance characteristics.