A heterogeneous model for a cylindrical fixed bed axial flow reactors applied to a naphtha reforming process with a non-
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A heterogeneous model for a cylindrical fixed bed axial flow reactors applied to a naphtha reforming process with a non‑uniform catalyst distribution in the pellet T. F. Boukezoula1,2 · L. Bencheikh1 · D. E. C. Belkhiat3 Received: 2 August 2020 / Accepted: 24 August 2020 © Akadémiai Kiadó, Budapest, Hungary 2020
Abstract The present work is an attempt to develop a mathematical model which describes the production of aromatics and hydrogen in the naphtha platforming unit of the refinery of Skikda in Algeria. The process is carried out in a cascade of four cylindrical different sized reactors. The mathematical model is based on the assumption that the system is a non-isothermal heterogeneous four fixed bed reactors with a catalytic pellet that contains two metallic catalysts and an acidic catalyst. These catalysts are assumed to be distributed, throughout the pellet, in a non uniform way. The metallic catalysts are Platinum (Pt) and Rhenium (Re). Furthermore, an axial dispersion and resistances to mass and thermal transfers have been considered in this model. The results from the simulation of the model were compared to industrial results, at the start of the cycle well before any deactivation process has taken place, obtained from the naphtha platforming unit of the refinery of Skikda in Algeria. This comparison was carried out in order to validate the model. This led to good agreement between the simulation results and the industrial results. Under the same conditions of validation but with a change in catalyst distributions, the simulated results show an enhancement in the production of aromatics, hydrogen and light products. The simulated results also showed that the fourth reactor is not necessary. Keywords Naphtha reforming · Heterogeneous model · Bifunctional catalyst · Metal sites · Non-uniform distribution · Cascade of reactors Electronic supplementary material The online version of this article (https://doi.org/10.1007/s1114 4-020-01851-3) contains supplementary material, which is available to authorized users. * T. F. Boukezoula fakhreddine.boukezoula@univ‑setif.dz; [email protected] 1
Laboratoire de Génie des Procédés Chimiques, Département de Génie des Procédés, Faculté de Technologie, Université Ferhat Abbas Sétif 1, 19000 Sétif, Algeria
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Département de Chimie, Université Ferhat Abbas Sétif 1, 19000 Sétif, Algeria
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Laboratoire du Dosage, Analyse et Caractérisation en Haute résolution, Faculté des Sciences, Université Ferhat Abbas Sétif 1, 19000 Sétif, Algeria
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Reaction Kinetics, Mechanisms and Catalysis
Introduction Octane number measures the anti-detonating power of the car gasoline which can be quantified by the evaluation of its combustion efficiency. The use of naphtha catalytic reforming is among the possibilities that lead to an increase of this number. The naphtha catalytic reforming is one of the basic processes in petrochemical industry which allows the naphtha, having a low octane number, to be converted to gasoline (reformate rich in aromatic compo
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