Breakup of colliding droplets and particles produced by heavy fuel oil pyrolysis

Klimenko, Alexandra; Shlegel, N.E.; Стрижак, П. А.

doi:10.1016/j.energy.2023.128480

Cited by 6 publications

(1 citation statement)

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“…Oil fuels are supposed to be the primary energy source and hold a dominant position among various energy sources, although new energy has been extensively researched in recent years. During the past few decades, unconventional oil exploitation of heavy oil reservoirs (HORs) has become increasingly important and has attracted extensive attention. − HORs are commonly characterized by a high content of asphaltenes (shown in Figure S1) among the four main components of saturated hydrocarbons, aromatics, resins, and asphaltenes in crude oil. − Based on the solubility regime, asphaltenes are generally defined as components that dissolve in aromatic solvents (e.g., benzene, toluene) but are insoluble in light alkanes (e.g., n -pentane (C5), n -heptane (C7)) . The molecular weight of asphaltenes can range from 800 to 11,000 g/mol, and their density can range from 1130 to 1200 kg/m 3 , which makes asphaltenes the largest and densest fraction of oil .…”

Section: Introductionmentioning

confidence: 99%

Performance Investigation of Asphaltene Adsorption at a Carbonate Rock Surface: Spectroscopy Experiment and Molecular Simulation

Ma,

Huang,

Wan

et al. 2024

Langmuir

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Investigation of asphaltene adsorption at rock surfaces plays an important role in enhanced oil recovery (EOR) for the petroleum industry. In this work, the interaction performances of asphaltene adsorption at carbonate dolomite and calcite surfaces are investigated based on experimental and simulation insights. On the one hand, macroscopic interaction performances were investigated by spectroscopy experiments to obtain the Langmuir thermodynamic model and pseudo-second-order (PSO) kinetic model. The results indicated monolayer molecular asphaltene adsorption for both dolomite and calcite, while they showed 'slow adsorption−slow desorption' for dolomite but 'fast adsorption−fast desorption' for calcite. Meanwhile, dolomite showed a higher adsorption capacity with q m(dol 1) = 5.35 mg/g > q m(cal 1) = 1.28 mg/g and a stronger adsorption spontaneity with ΔG m(dol 1) θ = −7.76 kJ/mol < ΔG m(cal 1) θ = −4.76 kJ/mol. On the other hand, microscopic interaction performances were investigated for three asphaltene molecules by molecular dynamics simulation (MDS) with ∼8 Å distance-placing and 500 ps time-running. According to the results, dolomite showed higher system stability than calcite with a lower final energy of ΔE dol−cal = −58 kJ/mol, and archipelago asphaltene showed higher adsorption stability with the smallest equilibrium energy of E arch(dol) = −147 kJ/mol for albite and E arch(cal) = −89 kJ/mol for calcite. The model of molecular orientation and force dominance was proposed as the interaction mechanism for asphaltene adsorption, which "lie sideways" at low concentrations but "stands upright" at high concentrations. This work allows the performance investigation and mechanism illustration of asphaltene adsorption at rock surfaces, which can help gain a fundamental understanding of the EOR during reservoir exploitation.

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