Continuous reactive chromatography

Lode, Florian; Houmard, Manuel; Migliorini, Cristiano; Mazzotti, Marco; Morbidelli, Massimo

doi:10.1016/s0009-2509(00)00229-3

Cited by 138 publications

(130 citation statements)

References 37 publications

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“…The activity coefficients were calculated using the UNIFAC method (22). The equilibrium constant and the kinetic parameters were determined in a previous work (23) and are given by: Moreover, the interstitial fluid velocity variation was calculated using the total mass balance assuming ideal liquid volumes additivity (16):…”

Section: Mathematical Modelmentioning

confidence: 99%

Dynamic Study of the Synthesis of 1,1-Dibutoxyethane in a Fixed-Bed Adsorptive Reactor

Graça

Pais

Silva

et al. 2011

Separation Science and Technology

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Section: Mathematical Modelmentioning

confidence: 99%

Dynamic Study of the Synthesis of 1,1-Dibutoxyethane in a Fixed-Bed Adsorptive Reactor

Graça

Pais

Silva

et al. 2011

Separation Science and Technology

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“…Methyl acetate synthesis by esterification of acetic acid with methanol and the backward reaction, the hydrolysis of methyl acetate, have been considered as model reactions for reactive distillation [1]and simulated moving bed (SMB) reactor [2]. Methyl acetate is used as solvent for the production of coating materials, nitro-cellulose, cellulose acetate, cellulose ethers, and celluloid.…”

Section: Introductionmentioning

confidence: 99%

“…In addition to the synthesis [1,2] and hydrolysis of methyl acetate [4], the above reaction finds application in the recovery of dilute acetic acid from wastewater, particularly in processes involving acetic anhydride [5,6] in which the dilute acetic acid should be removed before discharging the wastewater. In the latter, methanol is added to convert acetic acid to methyl acetate, which can be recovered easily from water.…”

Section: Introductionmentioning

confidence: 99%

Determination of adsorption and kinetic parameters for methyl acetate esterification and hydrolysis reaction catalyzed by Amberlyst 15

Hidajat

Ray

2004

Applied Catalysis A: General

112

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In this paper, the adsorption equilibrium constants, dispersion coefficients, and kinetic parameters were obtained for the liquid phase reversible reaction of methanol with acetic acid catalyzed by Amberlyst 15. The adsorption and kinetic parameters are determined corresponding to two different mobile phases, methanol and water. Such parameters are required for three different applications of the model reaction: namely, synthesis of methyl acetate, removal of dilute acetic acid from wastewater, and hydrolysis of methyl acetate. Experiments were conducted in a packed bed reactor in the temperature range 313-323 K using a rectangular pulse input. A mathematical model for a quasi-homogeneous kinetics was developed. The adsorption and kinetic parameters together with their dependence on temperature were determined by tuning the simulation results to fit the experimentally measured breakthrough curves of acetic acid, water (or methanol) and methyl acetate using a state-of-the-art optimization technique, the genetic algorithm. The mathematical model was further validated using the tuned parameters to predict experimental results at different feed concentrations and flow rates. The kinetics reported in this study was obtained under conditions free of both external and internal mass transfer resistance. The computed parameters were found to predict experimental elution profiles for both batch and plug flow reactors reasonably well.

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“…Based on the first chromatographic reactors, which appeared in the early sixties (Sardin et al, 1993), most of the Simulated Moving Bed Reactors are applied to an A (+ B) ↔ C + D type of reaction. To achieve the reaction, a catalyst can be mixed with the adsorbent, with the desorbent (homogenous catalysis (Ganetsos et al, 1993)), or an adsorbent with catalyst function can be used (Takeuchi and Uraguchi, 1977;Dulot, 2000;Lode et al, 2001). For those cases, the SMBR process is the same as a non-reactive SMB.…”

Section: Smbr Principlementioning

confidence: 99%

“…Many publications have established the efficiency of a SMBR for A ↔ B + C (sucrose inversion (Ganetsos et al, 1993;Kurup et al, 2005), esterification (Lode et al, 2001), toluene disproportionation (Dulot, 2000), hydrolysis methyl acetate (Yu et al, 2005)) but only few studies on the A ↔ B reactive system have been published.…”

Section: Smbr Principlementioning

confidence: 99%

Intensification of Paraxylene Production using a Simulated Moving Bed Reactor

Bergeot

Leinekugel‐le‐Cocq

Wolff

et al. 2010

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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Résumé -Intensification de la production de paraxylène à l'aide du lit mobile simulé réactif -Les réacteurs multifonctionnels, qui associent une étape de séparation et une étape de réaction dans une seule et même unité, constituent un axe de développement important dans le domaine de l'éco-conception des procédés afin de réduire les coûts énergétiques et environnementaux. Ils permettent de réduire, voire d'éliminer, les flux de recyclage et la taille des unités afin d'obtenir des procédés moins coûteux et plus sûrs. Cet article présente l'étude d'un réacteur multifonctionnel couplant une réaction d'isomérisation et une séparation par adsorption : le Lit Mobile Simulé Réactif (LMSR). Ce procédé est appliqué à la séparation réactive des xylènes. Le procédé actuel permet de produire du paraxylène (PX) pur (à plus de 99,7 %) à partir d'un mélange d'isomères grâce à une étape de séparation par Lit Mobile Simulé (LMS) et une étape d'isomérisation en phase gaz. La majeure partie de l'alimentation du LMS provient du recyclage des isomères du paraxylène qui sont transformés dans le réacteur. La séparation réactive, en intégrant l'isomérisation dans le LMS, devrait permettre de réduire ce flux de recyclage et les utilités associées. La séparation des xylènes s'effectuant en phase liquide, la première étape de cette étude a donc été de vérifier la faisabilité de la réaction en phase liquide. Ces tests ont permis de valider l'utilisation de la zéolithe HZSM-5 comme catalyseur de la réaction et du toluène comme désorbant pour la séparation (à la place du paradiéthylbenzène, plus classiquement utilisé, mais qui s'isomérise au contact de ce catalyseur). Les données expérimentales ont permis d'estimer des paramètres cinétiques pour un modèle d'isomérisation en phase liquide des xylènes. Ce modèle a été ajouté à un modèle de séparation par Lit Mobile Vrai (LMV) pour obtenir un simulateur de Lit Mobile Vrai Réactif (LMVR). Grâce à ce simulateur de LMVR, les conditions de fonctionnement du procédé LMSR ont pu être déterminées. Ces conditions de fonctionnement montrent qu'il est possible de réduire le flux de recyclage de plus de 40 % tout en conservant la même productivité. Une étude comparative des deux schémas de production de PX dans leur globalité permet d'espérer une réduction des coûts d'investissement et des coûts opératoires grâce au procédé LMSR. Oil & Gas Science and Technology -Rev. IFP Energies nouvelles, Vol. 65 (2010) Abstract -Intensification of Paraxylene Production using a Simulated Moving Bed ReactorMultifunctional reactors, which combine a reaction step and a separation step in one single unit, constitute an important advance in design of sustainable processes to save energy and reduce environmental impact. They allow reductions of recycle flows and size units in order to have more safety and less expansive processes. This paper deals with separation by adsorption and reaction coupled in a Simulated Moving Bed reactor (SMBR) for paraxylene (PX) production. In the current industrial process, the major part of th...

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Continuous reactive chromatography

Cited by 138 publications

References 37 publications

Dynamic Study of the Synthesis of 1,1-Dibutoxyethane in a Fixed-Bed Adsorptive Reactor

Dynamic Study of the Synthesis of 1,1-Dibutoxyethane in a Fixed-Bed Adsorptive Reactor

Determination of adsorption and kinetic parameters for methyl acetate esterification and hydrolysis reaction catalyzed by Amberlyst 15

Intensification of Paraxylene Production using a Simulated Moving Bed Reactor

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