Determination of Compatibility and Stability of Residual Fuels Before Mixing in Tanks

Sultanbekov, Radel; Shammazov, I. A.; Schipachev, A.M.

doi:10.17122/ngdelo-2021-3-128-137

Cited by 2 publications

(3 citation statements)

References 15 publications

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“…The asphaltenes content in some oil fractions can reach 30% or more, which greatly complicates compounding [16][17][18]. The solubility of asphaltenes in oils, petroleum products and individual hydrocarbons is not the same and is significant for the sedimentation stability of residual marine fuels during their storage, transportation and use [14,19,20]. Usually, asphaltenes are dark brown to black, fluffy solids with a high molecular weight.…”

Section: Introductionmentioning

confidence: 99%

Application of the UNIFAC Model for the Low-Sulfur Residue Marine Fuel Asphaltenes Solubility Calculation

Поваров

Efimov

Smyshlyaeva

et al. 2022

JMSE

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Since 2020, 0.5% limits on the sulfur content of marine fuels have been in effect worldwide. One way to achieve this value is to mix the residual sulfur and distillate low sulfur components. The main problem with this method is the possibility of sedimentation instability of the compounded residual marine fuel due to sedimentation of asphaltenes. In this paper, the application of the UNIFAC group solution model for calculating the solubility of asphaltenes in hydrocarbons is considered. This model makes it possible to represent organic compounds as a set of functional groups (ACH, AC, CH2, CH3), the qualitative and quantitative composition of which determines the thermodynamic properties of the solution. According to the asphaltene composition, average molecular weight (450–2500 mol/L) and group theories of solutions, a method for predicting the sedimentation stability of compounded residual marine fuels was proposed. The effect of the heat of fusion, temperature of fusion, molecular weight, and group composition on the solubility of asphaltenes in marine fuel has been evaluated. The comparison of the model approach with the data obtained experimentally is carried out. The results obtained make it possible to predict the sedimentation stability of the fuel system depending on the structure and composition of asphaltenes.

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Section: Introductionmentioning

confidence: 99%

Application of the UNIFAC Model for the Low-Sulfur Residue Marine Fuel Asphaltenes Solubility Calculation

Поваров

Efimov

Smyshlyaeva

et al. 2022

JMSE

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show abstract

“…To conduct the laboratory tests with thermal aging of the sample, it is necessary to attach a condenser tube to the conical flask with a mixture of petroleum products (to prevent evaporation of light fractions) and place it in an oil bath heated to a temperature 100.0 ± 0.5 °C for 24.00 ± 0.25 h [26,27]. Shake the flask after holding to ensure that the sediment is evenly distributed.…”

mentioning

confidence: 99%

“…Previously, studies of different types of fuels for compatibility were performed and incompatible mixtures of residual fuels were determined [27,28]. As objects of study, fuels of TSU-380 brand (sample 1) and a compound of lubricating oils, brand A, type 1 (sample 2) were chosen, since these samples of residual marine fuels contain all the main groups of hydrocarbons, namely: normal alkanes, isoalkanes, alkenes, naphthenic, aromatic, and asphaltene-resinous substances.…”

mentioning

confidence: 99%

Manifestation of incompatibility of marine residual fuels: a method for determining compatibility, studying composition of fuels and sediment

Sultanbekov

Schipachev

2022

PMI

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The results of studying the problem of active sediment formation when mixing residual fuels, caused by manifestation of incompatibility, are presented. A laboratory method has been developed for determining the compatibility and stability of fuels allowing identification of a quantitative characteristic of sediment formation activity. Laboratory studies were performed, and incompatible fuel components were identified. Tests were made to determine the quality indicators of samples and group individual composition of fuels. Results on the content of total and inorganic carbon in the obtained sediments were determined using Shimadzu TOC-V SSM 5000A. Chemical composition was determined and calculated on LECO CHN-628 analyser. Group composition of hydrocarbon fuels contained in the sediment was studied by gas chromato-mass spectrometry on GCMS-QP2010 Ultra Shimadzu. To obtain additional information on the structural group composition of fuel sediment, IR spectrometry was performed on IR-Fourier spectrometer IRAffinity-1. X-ray diffraction analysis of sediment samples was made using X-ray diffractometer XRD-7000 Shimadzu; interplanar distances d002 and d100 as well as Lс and Lа crystallite sizes served as the evaluation criteria. Microstructural analysis of total sediment was performed by scanning electron microscopy. The results of the research confirmed that the content of normal alkanes in the fuel mixture mainly affects sediment formation. Recommendations were drawn on preserving the quality of fuels and reducing sediment formation during storage and transportation.

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Determination of Compatibility and Stability of Residual Fuels Before Mixing in Tanks

Cited by 2 publications

References 15 publications

Application of the UNIFAC Model for the Low-Sulfur Residue Marine Fuel Asphaltenes Solubility Calculation

Application of the UNIFAC Model for the Low-Sulfur Residue Marine Fuel Asphaltenes Solubility Calculation

Manifestation of incompatibility of marine residual fuels: a method for determining compatibility, studying composition of fuels and sediment

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