Deep Eutectic Solvents for Sustainable Management of Asphaltene Deposition in Oil Production

Salimat Ryspaeva1

Aigul Kerimkulova1,Email

Khadichakhan Rafikova1

Saule Naurizova1

Sholpan Islam1

Murat Aydemir2

Madina Kozhaisakova3

1Department of Chemical and Biochemical Engineering, Satbayev University, Almaty, Satbayev 22, Kazakhstan.
2Department of Chemistry, Faculty of Science, Dicle University, Diyarbakir, 21280, Turkey.
3Almaty Technological University, Almaty, Tole by 100, Kazakhstan.

Abstract

Deep Eutectic Solvents (DES) offer a sustainable solution for mitigating asphaltene deposition in oil production, minimizing environmental impact and enhancing operational efficiency in the petroleum industry. The paper investigates the sustainable management of asphaltene deposition in oil production through the application of Deep Eutectic Solvents (DESs). Three DES formulations were prepared, namely DES1 (Citric acid:Glycerin, 1:4 ratio), DES2 (Citric acid:Ethylene Glycol, 1:4 ratio), and DES3 (Choline chloride:Glycerin, 1:2 ratio). The physical properties, including pH, density, and viscosity, of these DESs were determined. The study utilized Karazhanbas crude oil from Western Kazakhstan, characterized by distinct hydrocarbon groups. The % by weight composition was as follows: Paraffin-naphthenic 17.2%, Aromatic (light) 10.2%, Aromatic (medium) 8.1%, Aromatic (heavy) 28.2%, Total resins 24.1%, and Asphaltenes 12.2%. The FTIR spectrum of the received DES and asphaltene was also determined. Asphaltene deposition was studied both with and without DES inhibitors. Microscopic tests revealed that DES3 exhibited superior results, as evidenced by significantly smaller asphaltene particle sizes compared to other DES formulations and the control without DES. The findings suggest that DES3 holds promise as an effective inhibitor for asphaltene deposition in oil production, offering a sustainable and environmentally friendly approach to address challenges associated with asphaltene-related issues in the petroleum industry.

Deep Eutectic Solvents for Sustainable Management of Asphaltene Deposition in Oil Production