Influence of ultrasonic treatment on kinetic of asphaltene aggregation in toluene/heptane mixture

Kuryakov, Vladimir N.

doi:10.1088/1742-6596/1942/1/012035

Cited by 5 publications

(3 citation statements)

References 18 publications

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“…LLC «VOLNA» (Moscow, Russia) developed the experemental set-up for the sonification of samples. This set-up allows to control the acoustic multifrequency fields at the given amplitude (32,33). The schematic drawing of the set up is illustrated in Figure 1.…”

Section: Methodsmentioning

confidence: 99%

Relaxation Process in Crude Oil after Ultrasonic Treatment

Baimukhametov,

Dengaev,

Safiullina

et al. 2024

IJE

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This paper presents an investigation on changes in viscosity and group composition of heavy oil samples after ultrasonic upgrading process. Heavy oil samples correspond to different oilfields (located in Russia) were processed under various ultrasonic mode, the cavitation consequence of which was controlled by acoustic method. The viscosity of samples was measured just after ultrasonic treatment, 10 minutes, and 1-34 days. The saturate, aromatic, resin and asphaltene (SARA) analysis was carried out after ultrasonic treatment with 34 days of relaxation and the achieved results were compared with the SARA fractions of original crude oil. The results of viscosity measurement showed viscosity reduction after the ultrasonic treatment. However, the viscosity was regressed after 1-4 days of relaxation with further reduction in 7 days. The degree of viscosity increase after 34 days was only 10% in contrast to viscosity of original crude oil. The power and the sonication time did not influence the relaxation process. In conclusion, attention was drawn to the results of SARA analysis, the content of saturates decreased and the relative content of heavy fragments such as resins and asphaltenes was increased, which determines the degree of viscosity increase after relaxation period.

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Section: Methodsmentioning

confidence: 99%

Relaxation Process in Crude Oil after Ultrasonic Treatment

Baimukhametov,

Dengaev,

Safiullina

et al. 2024

IJE

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“…The experimental set-up for the ultrasonic treatment of the heavy oil was developed by LLC "VOLNA" (Moscow, Russia). The key feature of the given experimental set-up was the ability to control the acoustic multifrequency fields at the given amplitude [73][74][75]. A schematic illustration of the experimental set-up is shown in Figure 4.…”

Section: Ultrasonic Treatment Set-upmentioning

confidence: 99%

Unveiling the Potential of Cavitation Erosion-Induced Heavy Crude Oil Upgrading

Baimukhametov,

Kayumov,

Dengaev

et al. 2023

Fluids

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The application of ultrasonic waves in the processing of hydrocarbons is a new promising technology that has developed rapidly in recent years. However, the acoustic-induced cavitation erosion phenomenon is poorly studied. In this paper, a comparison study of cavitation erosion was carried out in water and oils with different viscosities produced from Ashal’cha and North Komsomol using an ultrasonic reactor operating at an industrial frequency of 20 kHz. The acoustic spectra obtained from hydrophones during the ultrasonic treatment of fluids can be characterized by using subharmonics of the main frequency and a continuous white noise level. Moreover, the cavitation erosion of aluminum foil under various ultrasound irradiation times and power levels was thoroughly investigated. It has been found that the process of ultrasonic cavitation has a less erosive impact on metal foil in oil due to its high viscosity. In addition, the formation of microflows in the oil phase, which also intensify the erosion process, is hindered. Cavitation erosion in the Ashal’cha oil sample exhibited a higher intensity compared to that in the North Komsomol oil sample. It was found that upon increasing ultrasound intensity in the case of the viscous (Ashal’cha) oil sample, cavitation stability was disrupted. In turn, this led to a reduction in the collapse energy of the cavitation bubbles. The results we obtained enable the assessment of cavitation erosion in crude oil and could be used to improve methodologies for monitoring and optimizing cavitation processes in crude oil.

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“…They concluded that ultrasonic waves could prevent macrostructure asphaltene flocs from forming in both heavier and lighter crude oils combined with n-alkenes. Other study found that ultrasonic waves can alter the kinetics of asphaltene flocculation in crude oils, lower the size of asphaltene aggregates, and increase rock permeability [31] , [32] , [33] .…”

Section: Introductionmentioning

confidence: 99%