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Mechanistic modeling and numerical simulation of axial flow catalytic reactor for naphtha reforming unit

Naphtha catalytic reforming (NCR) process has been of tremendous attention all over the world owing to the significant requirement for high-quality gasoline. Industrialized naphtha reforming unit at oil refineries applies a series of fixed bed reactors (FBRs) to improve the quality of the low-octane...

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Autores principales: Pishnamazi, Mahboubeh, Taghvaie Nakhjiri, Ali, Rezakazemi, Mashallah, Marjani, Azam, Shirazian, Saeed
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Public Library of Science 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7679015/
https://www.ncbi.nlm.nih.gov/pubmed/33216768
http://dx.doi.org/10.1371/journal.pone.0242343
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author Pishnamazi, Mahboubeh
Taghvaie Nakhjiri, Ali
Rezakazemi, Mashallah
Marjani, Azam
Shirazian, Saeed
author_facet Pishnamazi, Mahboubeh
Taghvaie Nakhjiri, Ali
Rezakazemi, Mashallah
Marjani, Azam
Shirazian, Saeed
author_sort Pishnamazi, Mahboubeh
collection PubMed
description Naphtha catalytic reforming (NCR) process has been of tremendous attention all over the world owing to the significant requirement for high-quality gasoline. Industrialized naphtha reforming unit at oil refineries applies a series of fixed bed reactors (FBRs) to improve the quality of the low-octane hydrocarbons and convert them to more valuable products. The prominent purpose of this research is to understand the catalytic reactor of naphtha reforming unit. For this aim, an appropriate mechanistic modeling and its related CFD-based computational simulation is presented to predict the behavior of the system when the reactors are of the axial flow type. Also, the triangular meshing technique (TMT) is performed in this paper due to its brilliant ability to analyze the results of model’s predictions along with improving the computational accuracy. Additionally, mesh independence analysis is done to find the optimum number of meshes needed for reaching the results convergence. Moreover, suitable kinetic and thermodynamic equations are derived based on Smith model to describe the NCR process. The results proved that the proceeding of NCR process inside the reactor significantly increased the concentration amount of aromatic materials, lighter ends and hydrogen, while deteriorated the concentration amount of naphthene and paraffin. Moreover, the pressure drop along the reactor length was achieved very low, which can be considered as one of the momentous advantages of NCR process.
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spelling pubmed-76790152020-12-02 Mechanistic modeling and numerical simulation of axial flow catalytic reactor for naphtha reforming unit Pishnamazi, Mahboubeh Taghvaie Nakhjiri, Ali Rezakazemi, Mashallah Marjani, Azam Shirazian, Saeed PLoS One Research Article Naphtha catalytic reforming (NCR) process has been of tremendous attention all over the world owing to the significant requirement for high-quality gasoline. Industrialized naphtha reforming unit at oil refineries applies a series of fixed bed reactors (FBRs) to improve the quality of the low-octane hydrocarbons and convert them to more valuable products. The prominent purpose of this research is to understand the catalytic reactor of naphtha reforming unit. For this aim, an appropriate mechanistic modeling and its related CFD-based computational simulation is presented to predict the behavior of the system when the reactors are of the axial flow type. Also, the triangular meshing technique (TMT) is performed in this paper due to its brilliant ability to analyze the results of model’s predictions along with improving the computational accuracy. Additionally, mesh independence analysis is done to find the optimum number of meshes needed for reaching the results convergence. Moreover, suitable kinetic and thermodynamic equations are derived based on Smith model to describe the NCR process. The results proved that the proceeding of NCR process inside the reactor significantly increased the concentration amount of aromatic materials, lighter ends and hydrogen, while deteriorated the concentration amount of naphthene and paraffin. Moreover, the pressure drop along the reactor length was achieved very low, which can be considered as one of the momentous advantages of NCR process. Public Library of Science 2020-11-20 /pmc/articles/PMC7679015/ /pubmed/33216768 http://dx.doi.org/10.1371/journal.pone.0242343 Text en © 2020 Pishnamazi et al http://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
spellingShingle Research Article
Pishnamazi, Mahboubeh
Taghvaie Nakhjiri, Ali
Rezakazemi, Mashallah
Marjani, Azam
Shirazian, Saeed
Mechanistic modeling and numerical simulation of axial flow catalytic reactor for naphtha reforming unit
title Mechanistic modeling and numerical simulation of axial flow catalytic reactor for naphtha reforming unit
title_full Mechanistic modeling and numerical simulation of axial flow catalytic reactor for naphtha reforming unit
title_fullStr Mechanistic modeling and numerical simulation of axial flow catalytic reactor for naphtha reforming unit
title_full_unstemmed Mechanistic modeling and numerical simulation of axial flow catalytic reactor for naphtha reforming unit
title_short Mechanistic modeling and numerical simulation of axial flow catalytic reactor for naphtha reforming unit
title_sort mechanistic modeling and numerical simulation of axial flow catalytic reactor for naphtha reforming unit
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7679015/
https://www.ncbi.nlm.nih.gov/pubmed/33216768
http://dx.doi.org/10.1371/journal.pone.0242343
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