Heterogeneous reactive extraction for secondary butyl alcohol liquid phase synthesis: Microkinetics and equilibria

Pfeuffer, Bernhard; Kunz, Ulrich; Hoffmann, Ulrich; Turek, Thomas; Hoell, Detlef

doi:10.1016/j.ces.2010.11.040

Cited by 6 publications

(4 citation statements)

References 11 publications

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“…The influence of the internal mass transfer is controversially discussed in literature. For similar reaction systems that were also heterogeneously catalyzed by acid ion-exchange resins, most authors, such as Gimenez et al, Gonzalez and Fair, Mazzotti et al, and Pfeuffer et al, have found that the influence of the internal mass transfer resistance can be neglected. Pöpken et al, however, observed an increase in the rate of reaction when the catalyst was subjected to grinding or abrasion for particle diameters below 65 μm.…”

Section: Resultsmentioning

confidence: 99%

“…Many measurements of esterification reaction kinetics that are heterogeneously catalyzed by ion-exchange resins have been reported in the literature. Mostly, batch reactor setups were employed for these measurements, for example, in the works of Pöpken et al., Steinigeweg and Gmehling, Altıokka and Çıtak Gangadwala et al, Teo and Saha, Calvar et al, Izci and Bodur, Patel and Saha, and Kolah et al A PFR was employed by both Schmitt and Hasse and Lee et al Other groups such as Rehfinger and Hoffmann and Pfeuffer et al used continuous stirred-tank reactors (CSTRs) for similar chemical systems also catalyzed by ion-exchange resins. These studies of reaction kinetics have in common that only one type of reactor was used.…”

Section: Introductionmentioning

confidence: 99%

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Reaction Kinetics for Reactive Distillation Using Different Laboratory Reactors

Harbou

Yazdani

Schmitt

et al. 2013

Ind. Eng. Chem. Res.

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The reaction kinetics of the heterogeneously catalyzed esterification of n-hexyl acetate were measured using both a batch reactor and continuous stirred tank reactor (CSTR). The catalyst was Amberlyst CSP2. The results of the batch reactor and CSTR experiments were compared to reaction kinetic measurements carried out in previous work using a plug-flow reactor (PFR). Because the change in the composition of the reaction mixture in the batch reactor is caused not only by reaction but also by component-specific adsorption on the catalyst, the batch reactor is not recommended for reaction kinetic measurements of the present type of chemical system. The results from the CSTR and PFR are in very good agreement with regard to the measured rate of reaction. To address the impact of the conditions present in a heterogeneously catalyzed reactive distillation (HCRD) column on the performance of the catalyst, the influences of boiling and of the reduction of the low-boiling components (here, water) on the rate of reaction were investigated using the CSTR. Neither was found to have a significant impact on the performance of the catalyst. A simple pseudohomogeneous model was fitted to the data of the CSTR experiments using a reparameterized Arrhenius equation to avoid parameter coupling. The model predictions and experimental results are in good agreement.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Reaction Kinetics for Reactive Distillation Using Different Laboratory Reactors

Harbou

Yazdani

Schmitt

et al. 2013

Ind. Eng. Chem. Res.

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show abstract

“…Internally recycled reactors have been widely used to investigate reaction kinetics and optimize the multiphase homogeneous or heterogeneous catalytic reactions with gas–solid, liquid–solid, and gas–liquid–solid interactions. − The main difference between rotating and stationary catalyst basket reactors is the flow direction of the gas penetrating the catalyst particles. While gas is axially forced through the stationary basket, the actual contact of gas with the catalyst is different for the leading face and backside in rotating bed reactors.…”

Section: Introductionmentioning

confidence: 99%

Hydrodynamic Characteristics of an Internal Recycle Berty Catalytic Reactor in Batch/Continuous or Packed/Fluidized Bed Modes

Cui

Kulkarni

Wagner³

et al. 2021

ACS Eng. Au

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Berty-type internal recycle reactors offer great opportunities for screening catalysts and reproducing catalytic reacting conditions in multiple processes, thus approaching industrial reactions while amplifying kinetic information. However, the rational design of these reactors requires a deeper understanding of their governing hydrodynamics and equations so that they can be better utilized in batch or continuous mode or as packed or fluidized beds. In this work, by adopting a slice model to represent a three-dimensional symmetric geometry with porous zone settings for catalyst beds, coupled with a species transport model, multiple reference frame, and SST k−ω turbulence model, we developed a computational fluid dynamic simulation strategy of a commercial Berty reactor manufactured by Integrated Lab Solutions (ILS). We conducted experiments to validate the proposed modeling approach under continuous packed bed operations, through which the hydrodynamic behaviors with packed/fluidized beds under the batch mode were also investigated by studying the influences of the transient injection, bed porosities, and rotation rates. As a result, we reported a set of equations to assess the bed velocity and contact time under different porosities, which simplified the performance improvements while replacing the need to perform complex simulations or conduct costly experiments. On the grounds of these hydrodynamic simulations and under various operating conditions, we discussed the pertinence of these instruments for intrinsic kinetic measurements in the batch/continuous or packed/fluidized bed operational modes.

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“…While there are many examples of LLS systems with industrially relevant products, e.g., alcohols, fatty acids, and biodiesel, there are fewer examples for enzymatic LLS systems. Examples can be found at Yadav and Manjula Devi, Shimizu et al, Xu et al, or Bhattacharya et al However, rigorous physical‐chemical modeling of such processes is still a rarity that can only be found in a few published works, for example at Leveneur et al, Pfeuffer et al, Iliuta et al, and Singh et al While the combination of rigorous modeling and optimization of multiphasic processes can be found in literature, for example for a process with extractive‐reactive production of 5‐hydroxymethylfurfural at Torres et al, it is also still a rarity, especially regarding industrially relevant enzymatic LLS systems and multi‐objective considerations.…”

Section: Introductionmentioning

confidence: 99%

Multi‐objective optimization superimposed model‐based process design of an enzymatic hydrolysis process

Zitzewitz

Fieg

2017

AIChE Journal

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The concepts of green process engineering and rigorous model‐based approaches have proven to be highly beneficial in process engineering. Although a combination of these two principles thus appears extremely promising, it is not found very commonly in literature. The very high complexity resulting from this combination poses great challenges for the process design and design engineers. Therefore, this work presents an innovative methodology for the model‐based process design with superimposed multi‐objective optimization for an exemplary process. This process for the enzymatic hydrolysis of fatty acid methyl ester combines several aspects of green process engineering and represents an exemplary process with an enzymatic liquid‐liquid‐solid reaction system. The optimization results based on operating and investment costs reveal important insights on the exemplary process and highlight the great advantages of the developed methodology as a profound basis for academic and industrial process design purposes. © 2017 American Institute of Chemical Engineers AIChE J, 63: 1974–1988, 2017

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Heterogeneous reactive extraction for secondary butyl alcohol liquid phase synthesis: Microkinetics and equilibria

Cited by 6 publications

References 11 publications

Reaction Kinetics for Reactive Distillation Using Different Laboratory Reactors

Reaction Kinetics for Reactive Distillation Using Different Laboratory Reactors

Hydrodynamic Characteristics of an Internal Recycle Berty Catalytic Reactor in Batch/Continuous or Packed/Fluidized Bed Modes

Multi‐objective optimization superimposed model‐based process design of an enzymatic hydrolysis process

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