Study of Bulk Properties Relation to SARA Composition Data of Various Vacuum Residues Employing Intercriteria Analysis

Stratiev, Dicho; Shishkova, Ivelina; Palichev, Georgi Nikolov; Atanassov, Krassimir; Ribagin, Simeon; Nenov, Svetoslav; Nedanovski, Dimitar; Ivanov, Vitaly

doi:10.3390/en15239042

Cited by 4 publications

(2 citation statements)

References 36 publications

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“…The API results in Figure complement the activity results, reported in Figures and , where the best overall performance was observed in MHCR-E. In addition to the API gravity, the stability of the product after heavy oil conversion should also be considered because any disturbance in the SARA fractions (saturate, aromatic, resin, and asphaltene) may result in sediment formation and asphaltene precipitation. − The overcracking of residual oil can considerably increase the saturate fraction, which consequently disturbs the balance between the other three fractions and results in asphaltene precipitation and unstable cracked oil . In addition to product instability, the precipitation of asphaltene on the catalyst surface can significantly increase the rate of coke formation and consequently the catalyst deactivation rate.…”

Section: Resultssupporting

confidence: 64%

Synthesis of Mild Hydrocracking Catalysts for Residue Conversion

AlHumaidan,

Bouresli,

AlSheeha

et al. 2023

Ind. Eng. Chem. Res.

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The objective of this research is to develop catalysts for residue hydrocracking that can enhance the yield of the middle distillates. The support compositions were tailored to achieve optimal textural properties and the desired acidic function, and the catalyst hydrogenation function (i.e., the active metal, promoter, and their composition) was chosen to attain the required hydrotreating activity. The supports were synthesized by incorporating amorphous and crystalline SiO 2 in porous Al 2 O 3 . The catalysts, on the other hand, were prepared by coimpregnating the support extrudates with Mo and Ni. This study revealed that support textural properties are crucial for the diffusion and conversion of complex hydrocarbon molecules. The results also indicated that a balance between acidic and hydrogenation functions is essential for governing the conversion rate, product selectivity, and catalyst stability. The pore-size distribution of the composite support materials was designed to form a bimodal type of pore structure (10−20 and 200−100 nm) to allow complex molecules (i.e., asphaltene and resin) to diffuse into the pores and reach the inner catalytic and acidic sites, which are responsible for hydrogenation and hydrocracking activities, respectively. The texture, acidity, and reduction properties of the catalysts were measured by using different characterization techniques. Temperature-programmed reduction results indicated that the interactions between the active metals and supports differed with the support type and composition. The catalytic performances of the prototype catalysts were evaluated using a multiple microreactor fixed-bed unit that emulated the hydrotreating reactions in industrial hydroprocessing units (380−400 °C, 12 MPa, and 1 h −1 LHSV). The improved catalysts provided a middle distillate yield in the range of 20−25% and prominent hydrotreating activities under mild hydrocracking conditions.

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Section: Resultssupporting

confidence: 64%

Synthesis of Mild Hydrocracking Catalysts for Residue Conversion

AlHumaidan,

Bouresli,

AlSheeha

et al. 2023

Ind. Eng. Chem. Res.

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“…More detailed information about the methods employed to characterize the crude oils whose properties are given in Table 1 is given in our recent research [34]. The methods availed to characterize the vacuum residues whose properties are given in Tables 2 and 5 are detailed in the studies [35,36].…”

Section: Physical and Chemical Characterization Of Studied Oilsmentioning

confidence: 99%

Effect of Crude Oil Quality on Properties of Hydrocracked Vacuum Residue and Its Blends with Cutter Stocks to Produce Fuel Oil

et al. 2023

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The production of heavy fuel oil from hydrocracked vacuum residue requires dilution of the residue with cutter stocks to reduce viscosity. The hydrocracked residue obtained from different vacuum residue blends originating from diverse crude oils may have divergent properties and interact with the variant cutter stocks in a dissimilar way leading to changeable values of density, sediment content, and viscosity of the obtained fuel oil. H-Oil hydrocracked vacuum residues (VTBs) obtained from different crude blends (Urals, Siberian Light (LSCO), and Basrah Heavy) were diluted with the high aromatic fluid catalytic cracking (FCC) light cycle, heavy cycle, and slurry oil, and the low aromatic fluid catalytic cracking feed hydrotreater diesel cutter stocks and their densities, sediment content, and viscosity of the mixtures were investigated. Intercriteria analysis evaluation of the data generated in this study was performed. It was found that the densities of the blends H-Oil VTB/cutter stocks deviate from the regular solution behavior because of the presence of attractive and repulsive forces between the molecules of the H-Oil VTB and the cutter stocks. Urals and Basrah Heavy crude oils were found to enhance the attractive forces, while the LSCO increases the repulsive forces between the molecules of H-Oil VTBs and those of the FCC gas oils. The viscosity of the H-Oil VTB obtained during hydrocracking of straight run vacuum residue blend was established to linearly depend on the viscosity of the H-Oil vacuum residue feed blend. The applied equations to predict viscosity of blends containing straight run and hydrocracked vacuum residues and cutter stocks proved their good prediction ability with an average relative absolute deviation (%AAD) of 8.8%. While the viscosity was found possible to predict, the sediment content of the blends H-Oil VTBs/cutter stocks was recalcitrant to forecast.

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Correlations of HTSD to TBP and Bulk Properties to Saturate Content of a Wide Variety of Crude Oils

et al. 2023

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Forty-eight crude oils with variations in specific gravity (0.782 ≤ SG ≤ 1.002), sulphur content (0.03 ≤ S ≤ 5.6 wt.%), saturate content (23.5 ≤ Sat. ≤ 92.9 wt.%), asphaltene content (0.1 ≤ As ≤ 22.2 wt.%), and vacuum residue content (1.4 ≤ VR ≤ 60.7 wt.%) were characterized with HTSD, TBP, and SARA analyses. A modified SARA analysis of petroleum that allows for the attainment of a mass balance ≥97 wt.% for light crude oils was proposed, a procedure for the simulation of petroleum TBP curves from HTSD data using nonlinear regression and Riazi’s distribution model was developed, and a new correlation to predict petroleum saturate content from specific gravity and pour point with an average absolute deviation of 2.5 wt.%, maximum absolute deviation of 6.6 wt.%, and bias of 0.01 wt.% was developed. Intercriteria analysis was employed to evaluate the presence of statistically meaningful relations between the different petroleum properties and to evaluate the extent of similarity between the studied petroleum crudes. It was found that the extent of similarity between the crude oils based on HTSD analysis data could be discerned from data on the Kw characterization factor of narrow crude oil fractions. The results from this study showed that contrary to the generally accepted concept of the constant Kw characterization factor, the Kw factors of narrow fractions differ from that of crude oil. Moreover, the distributions of Kw factors of the different crudes were different.

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Study of Bulk Properties Relation to SARA Composition Data of Various Vacuum Residues Employing Intercriteria Analysis

Cited by 4 publications

References 36 publications

Synthesis of Mild Hydrocracking Catalysts for Residue Conversion

Synthesis of Mild Hydrocracking Catalysts for Residue Conversion

Effect of Crude Oil Quality on Properties of Hydrocracked Vacuum Residue and Its Blends with Cutter Stocks to Produce Fuel Oil

Correlations of HTSD to TBP and Bulk Properties to Saturate Content of a Wide Variety of Crude Oils

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