Unsteady-state mathematical model of diesel fuels catalytic dewaxing process

The climatic features of Russia, as well as the need for the development of the Arctic and the Great Northern Sea Route, require an increase in the production of winter diesel fuel. The object of the study is obtaining winter diesel fuel. The subject of the study is digitalizing oil-refining processes by building the mathematical model of winter diesel fuel production for the case of combining dewaxing regimes taking into account the logistical aspect. Main research methods: retrospective data analysis, synthesis, comparison, optimization theory methods. A literary review was carried out, the main methods for improving the low-temperature properties of winter diesel fuel were revealed. Study hypothesis: a combination of dewaxing regimes will increase the yield of denormalizate and, accordingly, winter diesel fuel. The authors for each mode of dewaxing compiled a mathematical model. Then, the authors constructed a mathematical model of obtaining winter diesel fuel for a combination of dewaxing regimes and taking into account the logistical aspect. The obtained mathematical model can be used to obtain the required amount of winter diesel fuel with compliance with quality requirements and taking into account the logistical aspect.

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“…In [12], researchers propose for consideration a nontrivial mathematical model of catalytic dewaxing.…”

Section: Methodsmentioning

confidence: 99%

Dewaxing models digitalization in the mathematical model of winter diesel fuel production

et al. 2021

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“…The coke content ( C K ) is determined by solving the system of differential equations (Eq. 1) in accordance with the mechanism of hydrocarbon conversion 21, taking into account the composition of the processed feedstock and reactions leading to the formation of coke, namely, the reactions of coke formation from aromatic hydrocarbons as aromatic hydrocarbons are most prone to condensation reactions and coke formation.…”

Section: Computer Modeling System Of the Diesel Fuel Catalytic Dewaximentioning

confidence: 99%

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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“…On the other hand, location of medical and emergency centers is one of the most important decisions in the area of health system management [16][17][18]. Site selection for the facility construction can have a significant effect on reducing costs and increasing the coverage level.…”

Section: Importance and Necessity Of Researchmentioning

confidence: 99%

A Mathematical Model for Locating the Medical and Emergency Centers considering the Failure Probability of Centers

Mosayebi

Mojaradi

Naeini

et al. 2020

Mathematical Problems in Engineering

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Enhancing the amount of industrial and chemical production is one of the most important effects of increasing rural people’s migration to cities, which leads to many abnormalities in the healthcare domain. In this regard, one of the most important tasks of health sector managers is designing and implementing some programs to monitor and control the level of community health, which is one of the health organizations’ strategic planning. On the other hand, the location of service centers is one of the most important problems in the area of strategic planning by any organization because selecting an appropriate site for constructing facilities can have a significant effect on reducing costs and increasing the coverage level. However, an appropriate site to construct the facilities must also have maximum reliability in addition to reducing costs and increasing the coverage level. This problem is important because many factors, such as natural disasters, result in failure of centers and influence the confidence level of system performance. Therefore, it is necessary to consider maximizing reliability in locating centers. For this purpose, an integer mathematical model is presented in this paper to select the optimum site for constructing the medical and emergency centers by considering the failure probability of each center. The research model’s objective function minimizes the system costs, including the costs of construction, patient transfer, and failure of medical and emergency centers. Finally, a numerical example is designed and reviewed by real-world problems to ensure the performance accuracy of the proposed model.

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Unsteady-state mathematical model of diesel fuels catalytic dewaxing process

Cited by 14 publications

References 29 publications

Dewaxing models digitalization in the mathematical model of winter diesel fuel production

Dewaxing models digitalization in the mathematical model of winter diesel fuel production

Computer Modeling System of the Industrial Diesel Fuel Catalytic Dewaxing Process

A Mathematical Model for Locating the Medical and Emergency Centers considering the Failure Probability of Centers

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