Mathematical modeling and simulation of a diolefin saturation reactor used in a naphtha hydrotreating process

Marteson Cristiano dos Santos Camelo

ORCID iD Universidade Federal do Agreste de Pernambuco (UFAPE), Campus Garanhuns Brasil

Sérgio Lucena

ORCID iD Universidade Federal de Pernambuco (UFPE) Brasil

Rony Glauco de Melo

ORCID iD Instituto Federal de Educação, Ciência e Tecnologia de Pernambuco (IFPE), Campus Recife Brasil

Resumo

This paper describes a dynamic mathematical model developed to simulate a diolefin reactor currently used in an existing naphtha hydrotreating process. Diolefins polymerize at temperatures above 200°C, which is reached in a reactor of hydrotreatment of naphtha. Therefore, the diolefins must be removed before they reach the hydrotreating reactors. This hydrotreating unit has an essential role in modern refineries as it specifies the naphtha of different units, such as distillation and delayed coker. A mathematical model of a three-phase reactor was developed, and it was used to obtain the kinetics of the diolefin and olefin saturation reaction in a range of temperature of 180-200°C, and pressure of 3.5-4 MPa. The kinetic model was developed by the experimental data from a Brazilian refinery. The reactor model includes correlations for determining mass-transfer coefficients, kinetics reaction rates, and properties of the compounds under process conditions. The kinetic model predicted the temperature profile along the reactor length with a minor absolute error. The developed model offers reliable simulated results when compared to experimental data.

Palavras-chave


Naphtha hydrotreating; Mathematical modeling; Kinetics of diolefin saturation


Texto completo:

Referências


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DOI: http://dx.doi.org/10.18265/1517-0306a2021id6181

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