Abstract
In this investigation, a number of Libyan crude oils (Amna, Hamada, Sarir, Aldhara, Zaggut, Sirtica, Rasco, Al Brega) were studied using 13C n.m.r. and true boiling point instrument to evaluate and characterize each crude oil and its products.
Each crude oil was distilled for five fractions at different temperatures and pressures by using true boiling point instrument (T.B.P.).
As a consequence, a number of physical properties were determined for each crude oil and its products, according to the ASTM standard method, and by applying 13 C n.m.r technique, qualitative and quantitative results were obtained as a percentage of aromatic and aliphatic for each fraction. Then by using a number of mathematical calculations, the straight chain aliphatic, Cn straight chain aliphatic and the average chain length are calculated.
It is clear that this valuable information, obtained in this investigation, can be utilized for crude oil marketing, and the development of similar alternatives of crude for petrochemical industries and refineries processes.