LrgpV1, Main, Exploration, bibRecord, 002178

Mass transfer in an external-loop airlift reactor: experiments and modeling

Identifieur interne : 002178 ( Main/Exploration ); précédent : 002177; suivant : 002179

Mass transfer in an external-loop airlift reactor: experiments and modeling

Auteurs : H. Dhaouadi [France] ; S. Poncin [France] ; J. M. Hornut [France] ; G. Wild [France] ; P. Oinas [Finlande] ; J. Korpijarvi [Finlande]

Source :

Chemical Engineering Science [ 0009-2509 ] ; 1997.

RBID : ISTEX:8B0971C463C5E6EC0386C309B60AC4D7B6835530

Descripteurs français

Pascal (Inist)
- Distribution temps séjour, Estimation paramètre, Etude expérimentale, Gaz liquide, Réacteur agitation pneumatique, Réacteur recirculation, Simulation numérique, Transfert masse.

English descriptors

Abstract

Abstract: The mass transfer in an airlift reactor is modeled using simple elementary models: the liquid flow in the riser and the downcomer is represented as plug flow with axial dispersion, while the gas-liquid separator and the bottom junction are considered as CSTRs for the liquid. The gas flow in the riser is represented as plug flow. The system of differential equations resulting from the mass balances applied to the different sections of the reactor are solved in the real-time domain using a commercial software (MODEST). The model parameters are evaluated by adjusting the variation with time of experimental and simulated oxygen concentration profiles in the reactor after change from deoxygenation to oxygenation of the recirculating liquid (dynamic method), at six different locations in the riser, gas-liquid separator and downcomer. The model is tested using experimental data obtained with advanced measuring techniques in a pilot airlift reactor. The data agree well with some correlations from literature.

Url:

https://api.istex.fr/document/8B0971C463C5E6EC0386C309B60AC4D7B6835530/fulltext/pdf

DOI: 10.1016/S0009-2509(97)00273-X

Affiliations:

Le document en format XML

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<author><name sortKey="Oinas, P" sort="Oinas, P" uniqKey="Oinas P" first="P." last="Oinas">P. Oinas</name>
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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Airlift</term>
<term>Airlift reactor</term>
<term>Analytical solution</term>
<term>Axial</term>
<term>Axial dispersion</term>
<term>Axial dispersion coefficient</term>
<term>Balance equations</term>
<term>Bottom junction</term>
<term>Coefficient</term>
<term>Column height</term>
<term>Dhaouadi</term>
<term>Different sections</term>
<term>Differential equations</term>
<term>Dispersion</term>
<term>Downcomer</term>
<term>Dynamic method</term>
<term>Elementary models</term>
<term>Elsevier science</term>
<term>Equation system</term>
<term>Experimental data</term>
<term>Experimental study</term>
<term>External loop airlift reactor</term>
<term>Fitting example</term>
<term>Gas liquid</term>
<term>Good agreement</term>
<term>Liquid phase</term>
<term>Liquid separator</term>
<term>Mass balances</term>
<term>Mass transfer</term>
<term>Mass transfer description</term>
<term>Multiphase systems</term>
<term>Numerical simulation</term>
<term>Numerical solution</term>
<term>Objective function</term>
<term>Oxygen concentration profiles</term>
<term>Oxygen concentrations</term>
<term>Oxygen probe response</term>
<term>Oxygen probes</term>
<term>Oxygen solubility</term>
<term>Parameter estimation</term>
<term>Parameter estimations</term>
<term>Plug flow</term>
<term>Pressure effect</term>
<term>Reactor</term>
<term>Recycle reactor</term>
<term>Residence time distribution</term>
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<term>Estimation paramètre</term>
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<term>Réacteur agitation pneumatique</term>
<term>Réacteur recirculation</term>
<term>Simulation numérique</term>
<term>Transfert masse</term>
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<term>Airlift reactor</term>
<term>Analytical solution</term>
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<term>Axial dispersion</term>
<term>Axial dispersion coefficient</term>
<term>Balance equations</term>
<term>Bottom junction</term>
<term>Coefficient</term>
<term>Column height</term>
<term>Dhaouadi</term>
<term>Different sections</term>
<term>Differential equations</term>
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<term>Dynamic method</term>
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<term>Equation system</term>
<term>Experimental data</term>
<term>External loop airlift reactor</term>
<term>Fitting example</term>
<term>Good agreement</term>
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<term>Liquid separator</term>
<term>Mass balances</term>
<term>Mass transfer</term>
<term>Mass transfer description</term>
<term>Multiphase systems</term>
<term>Numerical solution</term>
<term>Objective function</term>
<term>Oxygen concentration profiles</term>
<term>Oxygen concentrations</term>
<term>Oxygen probe response</term>
<term>Oxygen probes</term>
<term>Oxygen solubility</term>
<term>Parameter estimations</term>
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<term>Pressure effect</term>
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<front><div type="abstract" xml:lang="en">Abstract: The mass transfer in an airlift reactor is modeled using simple elementary models: the liquid flow in the riser and the downcomer is represented as plug flow with axial dispersion, while the gas-liquid separator and the bottom junction are considered as CSTRs for the liquid. The gas flow in the riser is represented as plug flow. The system of differential equations resulting from the mass balances applied to the different sections of the reactor are solved in the real-time domain using a commercial software (MODEST). The model parameters are evaluated by adjusting the variation with time of experimental and simulated oxygen concentration profiles in the reactor after change from deoxygenation to oxygenation of the recirculating liquid (dynamic method), at six different locations in the riser, gas-liquid separator and downcomer. The model is tested using experimental data obtained with advanced measuring techniques in a pilot airlift reactor. The data agree well with some correlations from literature.</div>
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Mass transfer in an external-loop airlift reactor: experiments and modeling

Mass transfer in an external-loop airlift reactor: experiments and modeling

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Descripteurs français

English descriptors

Abstract

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