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Abstract <p>In this paper, preliminary investigations and characterization are carried out to examine the flocculation behavior and properties of three asphaltene samples extracted from a Hassi-Messaoud oil well deposit. The study, based on a model system of these asphaltenes in toluene, employs near-IR absorption spectrophotometry to determine the flocculation onset and assess asphaltene stability upon addition of a flocculating agent. The experimental data are analyzed using a Flory–Huggins approach, which evaluates asphaltene stability across a range of concentrations. Furthermore, various analytical techniques are applied to determine the physicochemical and structural properties of the Algerian asphaltenes in solution, suggesting that the structural characterization and aggregation of the asphaltene samples proceed via a similar mechanism. Indeed, only minor differences are observed between both the flocculation onset and the physicochemical properties of the asphaltenes examined.</p>

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Correlation of Structural Characteristics with Flocculation Behavior of Asphaltenes from Algerian Hassi-Messaoud Oil

  • 期刊论文

  • 发表日期：

    2026年2月1日

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  • Khadidja Kradra Brahma,
  • Amina Sardi,
  • Souad Bennabi,
  • Youcef Bouhadda,
  • Soumia Abdelkrim

摘要

Abstract

In this paper, preliminary investigations and characterization are carried out to examine the flocculation behavior and properties of three asphaltene samples extracted from a Hassi-Messaoud oil well deposit. The study, based on a model system of these asphaltenes in toluene, employs near-IR absorption spectrophotometry to determine the flocculation onset and assess asphaltene stability upon addition of a flocculating agent. The experimental data are analyzed using a Flory–Huggins approach, which evaluates asphaltene stability across a range of concentrations. Furthermore, various analytical techniques are applied to determine the physicochemical and structural properties of the Algerian asphaltenes in solution, suggesting that the structural characterization and aggregation of the asphaltene samples proceed via a similar mechanism. Indeed, only minor differences are observed between both the flocculation onset and the physicochemical properties of the asphaltenes examined.