A membrane catalytic bed concept for naphtha reforming in the presence of catalyst deactivation

Mostafazadeh, Ali Khosravanipour; Rahimpour, Mohammad Reza

doi:10.1016/j.cep.2008.08.003

Cited by 51 publications

(18 citation statements)

References 26 publications

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“…In the temperature profile in the naphtha reforming process should not exceed 550 C or 823 K as mentioned in literature [36,37]. However, to obtain more acceptable answers, the upper limit of the temperature profile has been set at 800 K. It may jeopardize the catalyst activity if the H 2 /HC molar ratio reaches a value less than 4.73 [12]. Therefore, the following constraints have been applied in the optimization procedure:…”

Section: Optimizationmentioning

confidence: 99%

“…Weifenget al [11] have suggested a multi objective optimization process to enhance aromatics production rate. Khosravanipour and Rahimpour [12] have investigated the dynamic behavior of a membrane reactor configuration for naphtha reforming process by using Smith's kinetic model. Iranshahiet al [13e15] have discussed the advantages of using optimized spherical reactor configuration and also thermally coupled recuperative reactor in order to improve the hydrogen and aromatics production rate in naphtha reforming process.…”

Section: Naphtha Reformingmentioning

confidence: 99%

See 1 more Smart Citation

Simultaneous hydrogen and aromatics enhancement by obtaining optimum temperature profile and hydrogen removal in naphtha reforming process; a novel theoretical study

Iranshahi

Bahmanpour

Paymooni

et al. 2011

International Journal of Hydrogen Energy

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Section: Optimizationmentioning

confidence: 99%

Section: Naphtha Reformingmentioning

confidence: 99%

Simultaneous hydrogen and aromatics enhancement by obtaining optimum temperature profile and hydrogen removal in naphtha reforming process; a novel theoretical study

Iranshahi

Bahmanpour

Paymooni

et al. 2011

International Journal of Hydrogen Energy

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“…208 The lower temperature profile in the reactors usually contributes to a lower rate of the catalyst deactivation. 220 There are many deactivation models for the naphtha process such as Levenspiel's deactivation kinetic model (LDKM), 221 deactivation models with residual activity (DMRA), 222 etc. Monzon et al 221 proposed a mathematical relation between the LDKM factors and the DMRA parameters.…”

Section: Theoretical Studiesmentioning

confidence: 99%

Moving Bed Reactors: Challenges and Progress of Experimental and Theoretical Studies in a Century of Research

Shirzad

Karimi

Silva

et al. 2019

Ind. Eng. Chem. Res.

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Moving bed reactors (MBRs) have been proposed as a sign of significant progress in the reaction engineering area for performance improving and energy saving. Since their advent in 1890, the MBRs have attracted a wide acceptance in different industries, while they were first developed for the drying industries. The progress that this technology has made during its evolution led to the introduction of these reactors as a pioneer strategy in other industries including petroleum, petrochemical, pyrolysis, and biomass industries. In the traditional reaction systems, the process performance decreases during the operational conditions, while MBRs have obviated this drawback by having an all-around permanent acceptable efficiency. In this context, the present work provides an overview on the evolution of MBRs by investigating the main experimental and theoretical studies. In this way, the experimental studies have typically taken into account operational conditions and production rates of different products, while in the theoretical research, modeling, and simulation of conventional processes, the evaluation of novel configurations and the optimization techniques have been investigated. In the end, some suggestions are proposed to modify the traditional MBRs as helpful ideas for further studies.

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“…Roy et al [14] worked on the simulation of membranebased fluidized bed reformers and their economic aspects. Khosravanipour and Rahimpour [15] as well as Rahimpour et al [11] presented the concept of membrane assisted naphtha reformer and studied the effects of in-situ hydrogen separation in a packed bed reactor and fluidized bed reactor for naphtha reforming. Their results showed an enhancement of aromatics along the reactor and studied the effects of combining the endothermic naphtha reforming reaction and hydrogenation of aniline to nitrobenzene in a thermally coupled fluidized bed reactor.…”

Section: Introductionmentioning

confidence: 99%

Model-Based Quality, Exergy, and Economic Analysis of Fluidized Bed Membrane Reactors

et al. 2021

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In petroleum refineries, naphtha reforming units produce reformate streams and as a by-product, hydrogen (H2). Naphtha reforming units traditionally deployed are designed as packed bed reactors (PBR). However, they are restrained by a high-pressure drop, diffusion limitations in the catalyst, and radial and axial gradients of temperature and concentration. A new design using the fluidized bed reactor (FBR) surpasses the issues of the PBR, whereby the incorporation of the membrane can improve the yield of products by selectively removing hydrogen from the reaction side. In this work, a sequential modular simulation (SMS) approach is adopted to simulate the hydrodynamics of a fluidized bed membrane reactor (FBMR) for catalytic reforming of naphtha in Aspen Plus. The reformer reactor is divided into five sections of plug flow reactors and a continuous stirrer tank reactor with the membrane module to simulate the overall FBMR process. Similarly, a fluidized bed reactor (FBR), without membrane permeation phenomenon, is also modelled in the Aspen Plus environment for a comparative study with FBMR. In FBMR, the continuous elimination of permeated hydrogen enhanced the production of aromatics compound in the reformate stream. Moreover, the exergy and economic analyses were carried out for both FBR and FBMR.

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A membrane catalytic bed concept for naphtha reforming in the presence of catalyst deactivation

Cited by 51 publications

References 26 publications

Simultaneous hydrogen and aromatics enhancement by obtaining optimum temperature profile and hydrogen removal in naphtha reforming process; a novel theoretical study

Simultaneous hydrogen and aromatics enhancement by obtaining optimum temperature profile and hydrogen removal in naphtha reforming process; a novel theoretical study

Moving Bed Reactors: Challenges and Progress of Experimental and Theoretical Studies in a Century of Research

Model-Based Quality, Exergy, and Economic Analysis of Fluidized Bed Membrane Reactors

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