Rapid Models for Predicting the Low‐Temperature Behavior of Diesel

Vráblík, Aleš; Velvarská, Romana; Štěpánek, K.; Pšenička, Martin; Hidalgo, José Manuel Soto; Černý, Radek

doi:10.1002/ceat.201800549

Cited by 12 publications

(5 citation statements)

References 17 publications

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“…The cold filter plugging point is considered in the study as it is the most important cold flow property of diesel fuel 22, 23. Tab.…”

Section: Resultsmentioning

confidence: 99%

“…Technological parameters of the process used in the calculations are as follows: the hydrogen-containing gas consumption is 25 000 m 3 h -1 ; the pressure in the reactor is 7.5 MPa; the temperature of hydrogen-containing gas is equal to 75°C, and the feedstock flow rate varies in the range of 280-320 m 3 h -1 . The cold filter plugging point is considered in the study as it is the most important cold flow property of diesel fuel [22,23]. Tab.…”

Section: Influence Of the Feedstock Composition And Flow Rate On The mentioning

confidence: 99%

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Computer Modeling System of the Industrial Diesel Fuel Catalytic Dewaxing Process

et al. 2020

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An unsteady mathematical model and a computer modeling system of the diesel fuel catalytic dewaxing process (mild hydrocracking) were developed. The modeling system allows for calculating the optimal technological mode to produce low‐freezing diesel fuel with the required cold filter plugging point taking into account the feedstock composition and catalyst activity. The modeling system consists of the main blocks: database, knowledge base, unsteady mathematical model of the diesel fuel catalytic dewaxing process, and application program package. Using the developed computer modeling system, the influence of the feedstock composition and flow rate as well as of the catalyst activity on the cold filter plugging point and the yield of diesel fuel is demonstrated.

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“…The cold filter plugging point is considered in the study as it is the most important cold flow property of diesel fuel 22, 23. Tab.…”

Section: Resultsmentioning

confidence: 99%

Section: Influence Of the Feedstock Composition And Flow Rate On The mentioning

confidence: 99%

Computer Modeling System of the Industrial Diesel Fuel Catalytic Dewaxing Process

et al. 2020

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“…Today, every nation in the globe is working really hard to get energy. Diesel fuel plays a crucial role in satisfying the demand in energy and is mostly used in a variety of commercial and industrial sectors as well as in the agriculture, our daily life, and other social spheres. − Wax crystals readily develop network architectures in diesel as the temperature decreases, − and the intense stacking of these crystals causes them to clog filters and negatively impact diesel flowability. ,− …”

Section: Introductionmentioning

confidence: 99%

Comparative Study between a Copolymer Based on Oleic Acid and Its Nanohybrid for Improving the Cold Flow Properties of Diesel Fuel

et al. 2023

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The as-synthesized copolymer based on the prepared monomers and its nanohybrid were used for improving the cold flow of diesel fuel that has a vital role in meeting energy needs. The copolymer (AE) was created using the prepared monomers, by free radical solution polymerization of the prepared hexadecylmaleamide and octyloleate ester, and the polymer nanohybrid (NH) was created by emulsion polymerization of the same monomers with 1% nano-SiO2. The chemical structures of the copolymer and its nanohybrid were proved by Fourier transform infrared spectroscopy (FTIR), 1H NMR, dynamic light scattering (DLS), and transmission electron microscopy (TEM). Through exploring the effect of the nanohybrid, before and after adding the dosage of the additives to the diesel fuel, the pour point temperature (PPT), rheological characteristics, and viscosity index were measured. The data were the best for the nanohybrid; the PPT decreased from −3 to −36 °C upon adding 10,000 ppm nanohybrid but decreased from −3 to −30 °C for 10,000 ppm copolymer. In addition, the efficiency of the additives was proved by viscosity–shear rate and shear rate–shear stress curves to give the apparent viscosity, which decreased from 124 cP for the blank to 15.74 and 12.8 cP for AE and NH, respectively; also, the yield stress decreased from 576 D/Cm2 for the blank to 541.44 and 477.9 D/Cm2 for AE and NH, respectively, at room temperature. The viscosity index increased from 116 for the blank to 119 and 121 for the copolymer and the nanohybrid, respectively. Polarizing optical microscopy was performed to show more tiny and separated wax upon adding the additives. The findings showed that delayed crystal precipitation and altered crystal shape with the NH and AE greatly reduced low-temperature viscosity and enhanced the cold flow characteristics of the diesel fuel.

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“…One way to obtain low-sulfur residue marine fuels is selective compounding, i.e., mixing of residual sulfur and distilling low-sulfur components [8,9]. The main problem is obtaining the sedimentation stability of the compounded residual marine fuel [10,11].…”

Section: Introductionmentioning

confidence: 99%

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

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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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Rapid Models for Predicting the Low‐Temperature Behavior of Diesel

Cited by 12 publications

References 17 publications

Computer Modeling System of the Industrial Diesel Fuel Catalytic Dewaxing Process

Computer Modeling System of the Industrial Diesel Fuel Catalytic Dewaxing Process

Comparative Study between a Copolymer Based on Oleic Acid and Its Nanohybrid for Improving the Cold Flow Properties of Diesel Fuel

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

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