Surface crystallization mechanism of n-hexane droplets

Bian, Jiang; Ding, Gaoya; Guo, Dan; Cao, Hengguang; Liu, Yang; Cao, Xuewen

doi:10.1016/j.energy.2022.125921

Cited by 1 publication

(2 citation statements)

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“…After the reaction of oil + water + Zn(II)O + K+ isopropanol, the degree of dispersion of the oil sample further increases, and isopropanol itself plays a role in dissolution and dilution. The main reason for the increase in wax crystal dispersion may be the cracking of colloidal asphaltene macromolecules in heavy oil into low-carbon hydrocarbons, which act as solvents, leading to a decrease in the solidification point and wax precipitation point after cracking, further dispersing the wax crystal structure and improving the fluidity of heavy oil [21][22][23].…”

Section: Analysis Of Wax Crystal Morphology Before and After Heavy Oi...mentioning

confidence: 99%

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Oil-Soluble Exogenous Catalysts and Reservoir Minerals Synergistically Catalyze the Aquathermolysis of Heavy Oil

Li,

Zhang,

Wang

et al. 2023

Molecules

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Oil is the “blood” and economic lifeblood of modern industry, but traditional light crude oil has been over-consumed, and it has been difficult to meet human demand for energy, so the exploitation of heavy oil is particularly important. In this paper, an oil-soluble catalyst was synthesized to catalyze the pyrolysis reaction of heavy oil in collaboration with reservoir minerals, so as to achieve efficient viscosity reduction of heavy oil and reduce production costs. The experimental results showed that Zn(II)O + K had the best synergistic viscosity reduction effect after the aquathermolysis of No. 1 oil sample under the reaction conditions of 180 °C, 4 h, 30% of water, and 0.2% of catalyst, respectively, and the viscosity reduction rate was 61.74%. Under the catalysis of the isopropanol system, the viscosity reduction rate was increased to 91.22%. A series of characterizations such as freezing point, thermogravimetric analysis, DSC analysis, component analysis, gas chromatography, wax crystal morphology analysis, and GC-MS analysis of aqueous organic matter were carried out on heavy oil after reaction by different reaction systems, and it could be verified that the viscosity of heavy oil was reduced. Finally, through the study of the reaction mechanism of the model compound, combined with the aqueous phase analysis, it can be clearly found that the depolymerization between macromolecules, the breaking of heteroatom chains, hydrogenation, ring opening, and other effects mainly occur during the reaction, thereby weakening the van der Waals force and hydrogen bond of the recombinant interval, inhibiting the formation of grid structure in heavy oil and effectively reducing the viscosity of heavy oil.

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Section: Analysis Of Wax Crystal Morphology Before and After Heavy Oi...mentioning

confidence: 99%

“…According to the literature review, o-methylphenol was hydrogenated and deoxygenated to form toluene. Based on the results of GC-MS analysis and [23,31], the mechanism of the hydrothermal cracking reaction of benzothiophene was derived, as shown in Figure 16.…”

Section: Catalytic Aquathermolysis Of Model Compoundsmentioning

confidence: 99%