Mass transfer in an external-loop airlift reactor: experiments and modeling
Identifieur interne : 000747 ( Istex/Corpus ); précédent : 000746; suivant : 000748Mass transfer in an external-loop airlift reactor: experiments and modeling
Auteurs : H. Dhaouadi ; S. Poncin ; J. M. Hornut ; G. Wild ; P. Oinas ; J. KorpijarviSource :
- Chemical Engineering Science [ 0009-2509 ] ; 1997.
English descriptors
- KwdEn :
- Airlift, Airlift reactor, Analytical solution, Axial, Axial dispersion, Axial dispersion coefficient, Balance equations, Bottom junction, Coefficient, Column height, Dhaouadi, Different sections, Differential equations, Dispersion, Downcomer, Dynamic method, Elementary models, Elsevier science, Equation system, Experimental data, External loop airlift reactor, Fitting example, Good agreement, Liquid phase, Liquid separator, Mass balances, Mass transfer, Mass transfer description, Multiphase systems, Numerical solution, Objective function, Oxygen concentration profiles, Oxygen concentrations, Oxygen probe response, Oxygen probes, Oxygen solubility, Parameter estimations, Plug flow, Pressure effect, Reactor, Riser, Separator, Simple model, Solubility.
- Teeft :
- Airlift, Airlift reactor, Analytical solution, Axial, Axial dispersion, Axial dispersion coefficient, Balance equations, Bottom junction, Coefficient, Column height, Dhaouadi, Different sections, Differential equations, Dispersion, Downcomer, Dynamic method, Elementary models, Elsevier science, Equation system, Experimental data, External loop airlift reactor, Fitting example, Good agreement, Liquid phase, Liquid separator, Mass balances, Mass transfer, Mass transfer description, Multiphase systems, Numerical solution, Objective function, Oxygen concentration profiles, Oxygen concentrations, Oxygen probe response, Oxygen probes, Oxygen solubility, Parameter estimations, Plug flow, Pressure effect, Reactor, Riser, Separator, Simple model, Solubility.
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:
DOI: 10.1016/S0009-2509(97)00273-X
Links to Exploration step
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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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<abstract xml:lang="en"><p>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.</p>
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<head><ce:title>Mass transfer in an external-loop airlift reactor: experiments and modeling</ce:title>
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<ce:surname>Dhaouadi</ce:surname>
<ce:cross-ref refid="AFF1"><ce:sup loc="post">∗</ce:sup>
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<ce:cross-ref refid="AFF2"><ce:sup loc="post">†</ce:sup>
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<ce:author><ce:given-name>S.</ce:given-name>
<ce:surname>Poncin</ce:surname>
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<ce:author><ce:given-name>J.M.</ce:given-name>
<ce:surname>Hornut</ce:surname>
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<ce:cross-ref refid="AFF2"><ce:sup loc="post">†</ce:sup>
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<ce:surname>Wild</ce:surname>
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<ce:surname>Oinas</ce:surname>
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<ce:textfn>Université Henri Poincaré de Nancy, IUT Le Montet, France</ce:textfn>
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<ce:textfn>Kemira Fine Chemicals Oy, Kokkola, Finland</ce:textfn>
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<ce:textfn>Kemira Chemicals Oy, Oulu Research Center, Oulu, Finland</ce:textfn>
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<ce:text>Corresponding author. Tel.: 33 383 175223; fax: 33 3833 229 75; e-mail:</ce:text>
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<ce:abstract class="author"><ce:section-title>Abstract</ce:section-title>
<ce:abstract-sec><ce:simple-para view="all" id="simple-para.0010">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.</ce:simple-para>
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<abstract 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.</abstract>
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