Adsorption of surfactants on resin-asphaltene associates in oil disperse systems

  • Natallia V. Yakavets Institute of General and Inorganic Chemistry, National Academy of Sciences of Belarus, 9/1 Surganava Street, Minsk 220072, Belarus
  • Nikolai P. Krut’ko Institute of General and Inorganic Chemistry, National Academy of Sciences of Belarus, 9/1 Surganava Street, Minsk 220072, Belarus
  • Olga V. Luksha Institute of General and Inorganic Chemistry, National Academy of Sciences of Belarus, 9/1 Surganava Street, Minsk 220072, Belarus
  • Tatyana F. Kouznetsova Institute of General and Inorganic Chemistry, National Academy of Sciences of Belarus, 9/1 Surganava Street, Minsk 220072, Belarus

Abstract

As a result of physical and chemical studies using the methods of IR spectroscopy, X-ray fluorescence spectrometry, thin layer chromatography and elemental analysis, the composition and structure of resin-asphaltene substances were studied. By the method of low-temperature adsorption – desorption of nitrogen, the influence of surfactants of cationic and non-ionic nature on the textural properties of resin-asphaltene associates was determined, their specific surface area, energy constant CBET, volume and average pore diameter were estimated. It has been established that the measured isotherms of low-temperature adsorption – desorption of nitrogen by samples of modified resin-asphaltene substances are a complex combination of physical sorption isotherms of types V and IV, inherent in macromesoporous materials. For resin-asphaltene substances, a decrease in the specific surface area, pore volume and energy constant CBET is observed, which indicates an increase in the hydrophobicity of their surface due to adsorption interaction with the surfactant. It was revealed that the greatest modifying effect is manifested in the presence of the non-ionic surfactant ethylenediamine tetrabis(ethoxylate-block-propoxylate)tetrol. The results of low-temperature adsorption – desorption of nitrogen correlate with the data obtained by studying of the capillary properties of the surface of resin-asphaltene substances when they are wetted with n-hexane.

 

Author Biographies

Natallia V. Yakavets, Institute of General and Inorganic Chemistry, National Academy of Sciences of Belarus, 9/1 Surganava Street, Minsk 220072, Belarus

PhD (chemistry); senior researcher at the laboratory of chemical-analytical studies of mineral raw materials, department of composite materials

Nikolai P. Krut’ko, Institute of General and Inorganic Chemistry, National Academy of Sciences of Belarus, 9/1 Surganava Street, Minsk 220072, Belarus

doctor of science (chemistry), academician of the National Academy of Sciences of Belarus, full professor; head of the department of composite materials

Olga V. Luksha, Institute of General and Inorganic Chemistry, National Academy of Sciences of Belarus, 9/1 Surganava Street, Minsk 220072, Belarus

PhD (chemistry); head of the laboratory of chemical-analytical studies of mineral raw materials, department of composite materials

Tatyana F. Kouznetsova, Institute of General and Inorganic Chemistry, National Academy of Sciences of Belarus, 9/1 Surganava Street, Minsk 220072, Belarus

PhD (chemistry), docent; head of the laboratory of adsorbents and adsorption processes

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Published
2024-08-13
Keywords: resin-asphaltene substances, surfactants, nitrogen low-temperature adsorption – desorption, specific surface area, texture
How to Cite
Yakavets, N. V., Krut’ko, N. P., Luksha, O. V., & Kouznetsova, T. F. (2024). Adsorption of surfactants on resin-asphaltene associates in oil disperse systems. Journal of the Belarusian State University. Chemistry, 2, 17-25. Retrieved from https://journals.bsu.by/index.php/chemistry/article/view/6240
Issue
No 2 (2024): Journal of the Belarusian State University. Chemistry
Section
Original Articles

Copyright (c) 2024 Journal of the Belarusian State University. Chemistry

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