Multiphase reactors : mass transfer and modeling

Landeghem, H. Van

doi:10.1016/0009-2509(80)80136-9

Cited by 46 publications

(8 citation statements)

References 156 publications

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“…Such a reactor model, apart from the detailed and consistent kinetic model like the present one, requires appropriate representation of the flow and mixing and providing values for the gas hold-up, interfacial area and the liquid phase mass transfer coefficient for the specified sparging and/or agitation device configuration. This could be done preferably by experimental cold flow studies, such as the one conducted by Andrigo et al [13] on the specific reactor used, or in the absence of experimental data, by using appropriate published correlations for the said hydrodynamic and transport parameters [23][24][25][26] or by the use of computational fluid dynamic modeling tools [27]. Despite well-known and sometimes justifiable reservations against the use of generalized correlations, the advantage of obtaining a quick and practical estimate of these parameters cannot be overemphasized.…”

Section: Predicted Product Distribution At the Exit Of A Continuous Amentioning

confidence: 99%

Kinetic modeling of liquid phase autoxidation of cumene

Bhattacharya

2008

Chemical Engineering Journal

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Section: Predicted Product Distribution At the Exit Of A Continuous Amentioning

confidence: 99%

Kinetic modeling of liquid phase autoxidation of cumene

Bhattacharya

2008

Chemical Engineering Journal

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“…All parameters except the last one have been obtained from the relevant literature. The mass transfer coefficients are determined using Calderbank's correlation . Diffusion coefficients are evaluated using the Wilke‐Chang correlation and interfacial area is found using the correlation given by Starks .…”

Section: Model Developmentmentioning

confidence: 99%

“…Equations (18)(19)(20) and (17) form a system of differential algebraic equations (DAEs). This system of DAEs are solved using DAE solver ode 15s in MATLAB.…”

Section: Equilibrium Based Model Neglecting Diffusional Resistancesmentioning

confidence: 99%

“…The mass transfer coefficients are determined using Calderbank's correlation. [17,18] Diffusion coefficients are evaluated using the Wilke-Chang correlation [19] and interfacial area is found using the correlation given by Starks. [20] The correlations used here for calculation of mass transfer coefficients and interfacial area involves droplet diameters formed at the stirring speeds used.…”

Section: Estimation Of Model Parametersmentioning

confidence: 99%

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Experimental validation of equilibrium based mathematical modelling of liquid‐liquid phase transfer catalysis

Vir

Pushpavanam

2017

Can J Chem Eng

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The reaction between two compounds which reside in immiscible phases can be accelerated using a phase transfer catalyst. The catalyst helps to transfer a species ion from one phase to the other phase, thus promoting its reaction. Several mechanisms have been proposed to describe phase transfer catalyzed reactions. In this work, we have carried out an experimental and theoretical study of phase transfer catalysis in batch mode. A mathematical model is developed which helps to predict the progress of the reaction under different operating conditions. Here the different species in the aqueous phase are assumed to be in equilibrium and these react with the species in the organic phase. The effect of diffusional resistance inside the dispersed organic phase is shown to be negligible. The two reaction systems studied are the phase transfer catalyzed (i) thioetherification and (ii) benzyl alcohol oxidation using sodium hypochlorite. Batch experiments were performed to determine the effect of catalyst loading, solvent dilution, and pH. The experimental results show that with an increase in catalyst loading, the phase transfer catalyzed reactions were accelerated. The use of a minimal amount of solvent results in a better performance. Benzyl alcohol oxidation is favoured under low pH conditions. The developed model is able to capture the performance of the system over a wide range of operating conditions accurately.

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“…Surface tension forces, which are thought to determine the hydrodynamics of flow in trickleflow reactors with small packings, stabilize the stratified flow structures in capillaries of small internal diameter ( < l mm). Landeghem, 1980;Herskowitz and Smith, 1983). In recent times, the catalyst dimensions in trickle-flow reactors have been Model Development reduced.…”

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confidence: 99%