Published June - July 2026, Pg. 44-59

Section: Oil refining and petroleum chemistry

UOT: 665.612.2-027.22

DOI: 10.37474/0365-8554/2026-06-07-44-59

Prospects of application of modern physical methods of analysis for oil research

V.M. Abbasov Dr. in Ch. Sc. - Institute of Petrochemical Processes

M.A. Najafova Dr. in Ch. Sc. - Institute of Petrochemical Processes

U.J. Yolchuyeva PhD in Ch. Sc. - Institute of Petrochemical Processes

Yu.A. Abdullayeva Cand. in Ch. Sc. - Institute of Petrochemical Processes

S.F. Akhmedbekova - Institute of Petrochemical Processes

M.A. Bayramov - Institute of Petrochemical Processes

This paper summarizes and systematizes data on studies conducted on EPR, UV, IR spectroscopy and luminescence of light, medium and heavy oils of Azerbaijan. Asphaltene radicals and metal oxides were detected in light shallow (685 m) Surakhani oil by EPR method. The composition and kerosene and diesel fractions of commercial Sangachal-deniz, Bulla-deniz, Kharazira and Alat-deniz oil (812.4 kg/m3) were studied, in which EPR spectra of Co, Mo and manganese were observed. The composition, properties, paramagnetism, minerals, and features of aromatic hydrocarbons of groups I-IV have been studied. It has been established that in the III group of aromatic hydrocarbons of oil, the EPR line with line width ∆Hwidth =7.5 mTl, g=2.4 is recorded. Derivatives of benzene, naphthalene, phenanthrene, and anthracene are present in small amounts in all I-III groups of petroleum hydrocarbons. Kerosene fractions of heavy oil have been studied. Absheron oil (912.5 kg/m3), in which an EPR signal with ∆Н=7.5 mTl, g=2.4 was detected. A similar radical exists in the III group of the Zaglynsky oil reserve. In diesel fractions West-Anseron EPR signal with line width ∆Hwidth=1.1 mTl, g=2.0023 is recorded in Absheron oil, a similar radical is also found in the II group of aromatic hydrocarbons of the West Absheron oil. It has been established by UV spectroscopy and luminescence that these radicals belong to substituted aromatic hydrocarbons. The features of the I-IV groups of aromatic hydrocarbons of Balakhani oil (919 kg/m3) have been studied. The presence of AU in oil indicates that the latter can act as photosensitizers of naphthenic-paraffinic hydrocarbons. Hydrocarbons of group II have a weak blue-blue luminescence, while groups III and IV have intense hydrocarbon luminescence with the formation of radicals. Of great practical importance are AU, which mainly have three or more condensed benzene rings with visible luminescence. The obtained results of spectroscopic studies of Absheron oil and its residual fractions >350 oC, >500 oC indicate their rational use as a binder for asphalt concrete used in road construction.

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