Dependence of visbroken residue viscosity and vacuum residue conversion in a commercial visbreaker unit on feedstock quality

Stratiev, Dicho; Nedelchev, Angel; Shishkova, Ivelina; Ivanov, Atanas; Sharafutdinov, Ilshat; Nikolova, Radoslava; Mitkova, Magdalena; Yordanov, Dobromir; Rudnev, N.A.; Belchev, Zlatozvet; Atanassova, Vassia; Atanassov, Krassimir

doi:10.1016/j.fuproc.2015.06.044

Cited by 23 publications

(17 citation statements)

References 14 publications

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“…Supporting Information for this article can be found under DOI: 10.1002/ceat.202000577. This section includes additional references to primary literature relevant for this research [50][51][52][53][54][55][56].…”

Section: Supporting Informationmentioning

confidence: 99%

Catalytic Cracking of Diverse Vacuum Residue Hydrocracking Gas Oils

et al. 2021

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Ten gas oils and one deasphalted hydrocracked vacuum residue obtained from ebullated‐bed vacuum residue hydrocracking have been cracked in a laboratory advanced catalyst evaluation unit on a commercial fluid catalytic cracking (FCC) catalyst. It was found that the eleven secondary heavy oils obey second‐order reaction kinetics. The relations between gas oil properties and FCC conversion, product yields, and quality were evaluated by means of intercriteria analysis. It could be stated that the FCC conversion strongly correlates with the gas oil Kw characterization factor. The product yields were established to depend on the secondary gas oil carbon atoms number, aromatic ring index, paraffinic and aromatic carbon content, and the total aromatics content.

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Section: Supporting Informationmentioning

confidence: 99%

Catalytic Cracking of Diverse Vacuum Residue Hydrocracking Gas Oils

et al. 2021

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“…The same model as that of Equation ( 18) was employed to simulate the viscosity of the blends of 70% SRVR/30% FCC HCO while employing data for 10 blends of 70% SRVR/ 30% FCC HCO from our earlier study [55] and 23 blends of 70% SRVR/30% FCC HCO shown in Table 1. The remaining seven blends of 70% SRVR/30% FCC HCO will be later used for verification of the models.…”

Section: Modeling Straight-run Vacuum Residue and Hydrocracked Vacuum...mentioning

confidence: 99%

“…The empirical models developed to predict SRVR viscosity (Models 1-4) were developed on the basis of data for 10 SRVRs taken from our earlier study [55] and 19 data sets taken from Table 1. The other 11 data sets in Table 2 were used to validate the prediction abilities of Models 1-4 to correctly predict the viscosity of the blends of 70% SRVR/30% FCC HCO.…”

Section: Validation Of the Developed Models To Simulate Viscosities A...mentioning

confidence: 99%

Empirical Modeling of Viscosities and Softening Points of Straight-Run Vacuum Residues from Different Origins and of Hydrocracked Unconverted Vacuum Residues Obtained in Different Conversions

et al. 2022

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The use of hydrocracked and straight-run vacuum residues in the production of road pavement bitumen requires a good understanding of how the viscosity and softening point can be modeled and controlled. Scientific reports on modeling of these rheological properties for hydrocracked and straight-run vacuum residues are scarce. For that reason, 30 straight-run vacuum residues and 33 hydrocracked vacuum residues obtained in a conversion range of 55–93% were investigated, and the characterization data were employed for modeling purposes. An intercriteria analysis was applied to investigate the statistically meaningful relations between the studied vacuum residue properties. It revealed that the straight-run and hydrocracked vacuum residues were completely different, and therefore their viscosity and softening point should be separately modeled. Through the use of nonlinear regression by applying CAS Maple and NLPSolve with the modified Newton iterative method and the vacuum residue bulk properties the viscosity and softening point were modeled. It was found that the straight-run vacuum residue viscosity was best modeled from the molecular weight and specific gravity, whereas the softening point was found to be best modeled from the molecular weight and C7-asphaltene content. The hydrocracked vacuum residue viscosity and softening point were modeled from a single property: the Conradson carbon content. The vacuum residue viscosity models developed in this work were found to allow prediction of the asphaltene content from the molecular weight and specific gravity with an average absolute relative error of 20.9%, which was lower of that of the model of Samie and Mortaheb (Fuel. 2021, 305, 121609)—32.6%.

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“…Tahapan proses penelitian swelling tersaji pada Gambar 2. (Stratiev, 2015), dan korelasi persamaan chemical potential (Sorenssen, 2013) terhadap energi ikatan (ΔG) (Alam, 2019). Persamaan viskositas kinematic dan persamaan untuk menghitung penurunan energi ikatan (ΔG) ditunjukkan pada Persamaan (1) dan (2).…”

Section: Cara Penelitianunclassified

Pengaruh Proses Swelling dengan Supercritical Gas CO2 terhadap Penurunan Energi Ikatan Senyawa Hidrokarbon Vacuum Residue

et al. 2019

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The present study aims to develop technology to utilize a vacuum residue by reducing its density, viscosity and energy bonding, using a batch reactor equipped with CO2 injection gas in the form of a swelling process. The study was conducted by applying temperature varied between 60 and 100 °C and CO2 flux pressure varied between 1 and 5 MPa, respectively. The study of applying temperature and CO2 flux pressure are used to decrease the bond energy of hydrocarbon compounds in the form of solid vacuum residue. Furthermore, a series of reaction time was carried out started in the range of 10-30 minutes to obtain the optimum reaction time. The result showed that at temperature of 100°C, pressure of 5 MPa and variation of time, the density, viscosity, and decrease in energy bonding (ΔG) were in the range of 0.919-0.902 g/cm3, 495-166 cSt, and 8.627–6.436 J.s, respectively. A B S T R A KPenelitian ini bertujuan untuk mengembangkan teknologi pemanfaatan vacuum residue dengan mengurangi densitas, viskositas dan energi ikatan. Pada penelitian ini digunakan reaktor batch yang dilengkapi dengan gas injeksi CO2 dalam bentuk proses swelling. Penelitian dilakukan dengan menerapkan variasi temperatur antara 60-100 °C dan tekanan fluks CO2 bervariasi antara 1-5 MPa. Rentang temperatur dan tekanan fluks CO2 yang digunakan dalam penelitian ini dimaksudkan untuk mengurangi energi ikatan senyawa hidrokarbon dalam bentuk padatan vacuum residue. Selanjutnya, serangkaian waktu reaksi dilakukan mulai dari 10, 15, 20, 25, dan 30 menit untuk mendapatkan waktu reaksi yang optimum. Hasil penelitian menunjukkan bahwa pada temperatur konstan (100 °C), tekanan konstan (5 MPa) dan variasi waktu diperoleh penurunan densitas (0,919–0,902 g/cm3), viskositas (495-166 cSt), dan penurunan energi ikatan (ΔG) menjadi 8,627–6,436 Js.

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Dependence of visbroken residue viscosity and vacuum residue conversion in a commercial visbreaker unit on feedstock quality

Cited by 23 publications

References 14 publications

Catalytic Cracking of Diverse Vacuum Residue Hydrocracking Gas Oils

Catalytic Cracking of Diverse Vacuum Residue Hydrocracking Gas Oils

Empirical Modeling of Viscosities and Softening Points of Straight-Run Vacuum Residues from Different Origins and of Hydrocracked Unconverted Vacuum Residues Obtained in Different Conversions

Pengaruh Proses Swelling dengan Supercritical Gas CO2 terhadap Penurunan Energi Ikatan Senyawa Hidrokarbon Vacuum Residue

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