A predictive model of catalytic cracking: Feedstock-induced changes in gasoline and gas composition

Nazarova, Galina; Ivashkina, Elena; Иванчина, Э. Д.; Oreshina, Alexandra; Vymyatnin, Е.

doi:10.1016/j.fuproc.2020.106720

Cited by 10 publications

(5 citation statements)

References 57 publications

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“…In their work, in addition to coking, the authors describe other undesirable thermal cracking reactions that occur in a high-temperature section of a riser. Understanding of kinetics and thermodynamics of the industrial FCC process is also the focus of our recent works [4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Development of a Two‐Fluid Hydrodynamic Model for a Riser Reactor

et al. 2022

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ANSYS Fluent is used to examine the mixing of catalyst zeolite particles with petroleum feedstock and water vapor in a fluid catalytic cracking (FCC) riser. A two-fluid model is developed for tracking catalyst particles and gas mixture in a riser, modeling the granular and gaseous phases as two interpenetrating continua. The hydrodynamic flows are analyzed with the aim to single out the principal physical effects that determine the distribution of particles. The results are compared with a study that is based on a non-isothermal reactive model. It is demonstrated that the simplistic purely hydrodynamic model generates similar flow fields. The developed model is valuable for improvements of modern FCC risers. The model is applied for understanding the hydrodynamics of an S-200 KT-1/1 industrial unit.

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Section: Introductionmentioning

confidence: 99%

Development of a Two‐Fluid Hydrodynamic Model for a Riser Reactor

et al. 2022

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“…As was noted above, catalytic cracked gasolines are widely used for blending in motor fuels. − To estimate the effect of oxygenation with nitrous oxide on the properties of light catalytic cracked gasoline, such important parameters as the knock characteristics, solvent-washed gum content, and corrosion activity were determined for LCCG samples.…”

Section: Resultsmentioning

confidence: 99%

“…The high content of olefinic compounds may negatively affect engine exhaust emissions and the storage stability of fuel. Olefins react more readily with atmospheric oxygen than other hydrocarbons, yielding oxidation and polymerization products and promoting changes in fuel characteristics during storage. − For these reasons, commercial motor gasolines are usually produced by blending FCC gasoline with different refinery streams and additives, such as reformate, alkylate, isomerate, etc. − According to the European Standard EN 228, the olefin content in gasoline is currently limited to 18 vol % …”

Section: Introductionmentioning

confidence: 99%

Reducing the Olefin Content in Light Fluid Catalytic Cracking Gasoline by Treatment with Nitrous Oxide

Дубков

Семиколенов

Иванов

et al. 2021

Ind. Eng. Chem. Res.

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Nitrous oxide (N 2 O) is a greenhouse gas with high global warming potential. Currently, only a small part of concentrated industrial N 2 O emissions is used to obtain valuable chemical products. Most of these emissions are neutralized by thermal or catalytic decomposition, which is associated with additional costs and, in the case of a thermal process, is accompanied by the formation of significant amounts of carbon dioxide. In the present work, nitrous oxide was used for the first time for the oxidative treatment of light catalytic cracked gasoline (LCCG). LCCG is one of the blending components of motor gasoline. However, it contains a significant amount of olefins, which negatively affects the storage stability of fuel. The conversion of olefins into oxygenates is one of the promising approaches to improving the performance of gasoline fuels. The treatment of LCCG with N 2 O was performed noncatalytically in the liquid phase at 473−523 K and elevated pressure. Under these conditions, N 2 O selectively oxidizes only olefinic compounds in LCCG to form carbonyl products (mainly ketones) and molecular nitrogen without affecting other components of LCCG. An increase in the content of oxygen, which was introduced into gasoline from N 2 O as the carbonyl product, to 2.3 wt % is accompanied by a nearly proportional growth of antiknock indexes from 88.2 for the parent LCCG to 89.5 for the most oxygenated LCCG.

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“…Obviously, understanding and accurate modelling of catalytic processing of distillates is needed for successful operation of a refinery, e.g. to predict the changes in operating parameters upon the feedstock change [5,6,7]. However, practical modelling is highly complicated by involvement of a large number of reactants that participate in a huge number of different reactions.…”

Section: Introductionmentioning

confidence: 99%

Three-Phase Simulation of Hydrotreating of Vacuum Gas Oil

Vorobev,

Ivashkina,

Arkenova

et al. 2023

Preprint

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We develop a numerical model for practical simulation of hydrotreatment of vacuum gas oil in a trickle-bed reactor. The model is based on the mass balance of species; it incorporates a seven-lump chemical scheme that describes the reactions of hydrodesulphurisation and hydrodearomatisation. The novelty of the model is splitting of sulphur-containing compounds into different lumps by their reactive abilities. The splitting is supported by the chromatographic analysis of hydrocarbon mixtures that are sampled from the inlet and outlet ends of an industrial hydrotreatment unit. The analysis reveals different susceptibilities of sulphides, benzothiophene, and dibenzothiophenes to hydrotreatment. The new model is applied for simulation of the hydrotreatment at a refinery, adjusting kinetic parameters, and demonstrating that the model provides an adequate (and, at the same time, simple) description of the process, giving guidance for optimisation that is needed after each variation of the feedstock.

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A predictive model of catalytic cracking: Feedstock-induced changes in gasoline and gas composition

Cited by 10 publications

References 57 publications

Development of a Two‐Fluid Hydrodynamic Model for a Riser Reactor

Development of a Two‐Fluid Hydrodynamic Model for a Riser Reactor

Reducing the Olefin Content in Light Fluid Catalytic Cracking Gasoline by Treatment with Nitrous Oxide

Three-Phase Simulation of Hydrotreating of Vacuum Gas Oil

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