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Features of rheological behavior of crude oil after ultrasonic treatment

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Abstract

Ultrasonic treatment is one of the known methods of influencing the rheological behavior of crude oil. However, control of crude oil viscosity is necessary not only after treatment but also in the long term. Based on experimental studies, a comprehensive assessment of the effect of ultrasonic treatment on the rheological properties of crude oil was carried out. The effect of ultrasonic treatment on oil of different compositions was studied: two samples of heavy crude oil, one sample of medium crude oil, and bio-oil, which is a product of the pyrolysis process of wood waste. The oil samples were taken from fields located in the Republic of Tatarstan (Russia). Ultrasonic treatment led to an increase in the viscosity of all crude oil samples, regardless of their composition and type of ultrasonic equipment (contact or non-contact). It was found that (in the interval of shear rate less than 0.8 s−1) the viscosity of heavy oil samples increases by 5.3–12.1%, medium oil—by 37%, and bio-oil—almost 2 times. Ultrasonic treatment of oils was also carried out at different frequencies (18 kHz, 24 kHz, 35 kHz). Additionally, the thermal history of crude oil was analyzed to highlight the thermal history from acoustic exposure, and the negative effect of oil preheating on its viscosity was found. The viscosity curves for the original crude oil and the treated one were approximated by the Carreau–Yasuda model.

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Acknowledgements

The investigation of the frequency of ultrasonic treatment on samples is carried out with the financial support of RSF (project number 19-11-00220). The part of reported study was funded by RFBR (project number 18-31-20037). The chemical composition of crude oils was studied under financial support of the government assignment for FRC Kazan Scientific Center of Russian Academy of Sciences.

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AK—Conceptualized, designed the experiments, supervised the work, reviewed and edited the manuscript. JK—Conducted the experiments and analyzed influence of ultrasonic treatment. EB—Investigated the chemical composition of crude oils. EV—Approximated the viscosity curves by the Carreau–Yasuda model, reviewed and edited the manuscript.

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Correspondence to Julia Karaeva.

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Kadyirov, A., Karaeva, J., Barskaya, E. et al. Features of rheological behavior of crude oil after ultrasonic treatment. Braz. J. Chem. Eng. 40, 159–168 (2023). https://doi.org/10.1007/s43153-022-00226-6

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  • DOI: https://doi.org/10.1007/s43153-022-00226-6

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