Simulation of Oxygen Mass Transfer in an Internal Loop Airlift Reactor with Axial Dispersion Model

The effect of superficial gas velocity within the range 0.01-0.164 m/s on gas holdup (overall, riser and down comer), volumetric oxygen mass transfer coefficient, liquid circulation velocity was studied in an internal loop concentric tubes airlift reactor (working volume 45 liters). It was shown th...

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Autores principales:	Mohammed Abd Atiya Al-Saraj, Ameel Mohammed Rahman, Aseel Abd Al-Jabbar
Formato:	article
Lenguaje:	EN
Publicado:	Al-Khwarizmi College of Engineering – University of Baghdad 2011
Materias:	Keywords: Airlift bioreactor, reactor, dissolved oxygen; modeling, axial dispersion model, hydrodynamics, mixing, internal loop, liquid circulation velocity, gas holdup. Chemical engineering TP155-156 Engineering (General). Civil engineering (General) TA1-2040
Acceso en línea:	https://doaj.org/article/30df79f3966c46b7844b7271057b4204
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spelling	oai:doaj.org-article:30df79f3966c46b7844b7271057b42042021-12-02T04:16:23ZSimulation of Oxygen Mass Transfer in an Internal Loop Airlift Reactor with Axial Dispersion Model1818-11712312-0789https://doaj.org/article/30df79f3966c46b7844b7271057b42042011-12-01T00:00:00Zhttp://alkej.uobaghdad.edu.iq/index.php/alkej/article/view/81https://doaj.org/toc/1818-1171https://doaj.org/toc/2312-0789 The effect of superficial gas velocity within the range 0.01-0.164 m/s on gas holdup (overall, riser and down comer), volumetric oxygen mass transfer coefficient, liquid circulation velocity was studied in an internal loop concentric tubes airlift reactor (working volume 45 liters). It was shown that as the usg increases the gas holdup and also the liquid circulation velocity increase. Also it was found that increasing superficial gas velocity lead to increase the interfacial area that increases the overall oxygen mass transfer coefficient. The hydrodynamic experimental results were modeled with the available equations in the literature. The predicted data gave an acceptable accuracy with the empirical data. The final empirical and predicted data were adopted in a mathematical model for oxygen mass transfer to predict the oxygen profile along the reactor. The predicted results have been validated with the experimental results. The simulated results based on the dispersion model for the riser and down comer and the perfect mixed model for the gas-liquid separator, agreed well with the experimental results over the studied range of operating conditions. Mohammed Abd Atiya Al-SarajAmeel Mohammed RahmanAseel Abd Al-JabbarAl-Khwarizmi College of Engineering – University of BaghdadarticleKeywords: Airlift bioreactor, reactor, dissolved oxygen; modeling, axial dispersion model, hydrodynamics, mixing, internal loop, liquid circulation velocity, gas holdup.Chemical engineeringTP155-156Engineering (General). Civil engineering (General)TA1-2040ENAl-Khawarizmi Engineering Journal, Vol 7, Iss 4 (2011)
institution	DOAJ
collection	DOAJ
language	EN
topic	Keywords: Airlift bioreactor, reactor, dissolved oxygen; modeling, axial dispersion model, hydrodynamics, mixing, internal loop, liquid circulation velocity, gas holdup. Chemical engineering TP155-156 Engineering (General). Civil engineering (General) TA1-2040
spellingShingle	Keywords: Airlift bioreactor, reactor, dissolved oxygen; modeling, axial dispersion model, hydrodynamics, mixing, internal loop, liquid circulation velocity, gas holdup. Chemical engineering TP155-156 Engineering (General). Civil engineering (General) TA1-2040 Mohammed Abd Atiya Al-Saraj Ameel Mohammed Rahman Aseel Abd Al-Jabbar Simulation of Oxygen Mass Transfer in an Internal Loop Airlift Reactor with Axial Dispersion Model
description	The effect of superficial gas velocity within the range 0.01-0.164 m/s on gas holdup (overall, riser and down comer), volumetric oxygen mass transfer coefficient, liquid circulation velocity was studied in an internal loop concentric tubes airlift reactor (working volume 45 liters). It was shown that as the usg increases the gas holdup and also the liquid circulation velocity increase. Also it was found that increasing superficial gas velocity lead to increase the interfacial area that increases the overall oxygen mass transfer coefficient. The hydrodynamic experimental results were modeled with the available equations in the literature. The predicted data gave an acceptable accuracy with the empirical data. The final empirical and predicted data were adopted in a mathematical model for oxygen mass transfer to predict the oxygen profile along the reactor. The predicted results have been validated with the experimental results. The simulated results based on the dispersion model for the riser and down comer and the perfect mixed model for the gas-liquid separator, agreed well with the experimental results over the studied range of operating conditions.
format	article
author	Mohammed Abd Atiya Al-Saraj Ameel Mohammed Rahman Aseel Abd Al-Jabbar
author_facet	Mohammed Abd Atiya Al-Saraj Ameel Mohammed Rahman Aseel Abd Al-Jabbar
author_sort	Mohammed Abd Atiya Al-Saraj
title	Simulation of Oxygen Mass Transfer in an Internal Loop Airlift Reactor with Axial Dispersion Model
title_short	Simulation of Oxygen Mass Transfer in an Internal Loop Airlift Reactor with Axial Dispersion Model
title_full	Simulation of Oxygen Mass Transfer in an Internal Loop Airlift Reactor with Axial Dispersion Model
title_fullStr	Simulation of Oxygen Mass Transfer in an Internal Loop Airlift Reactor with Axial Dispersion Model
title_full_unstemmed	Simulation of Oxygen Mass Transfer in an Internal Loop Airlift Reactor with Axial Dispersion Model
title_sort	simulation of oxygen mass transfer in an internal loop airlift reactor with axial dispersion model
publisher	Al-Khwarizmi College of Engineering – University of Baghdad
publishDate	2011
url	https://doaj.org/article/30df79f3966c46b7844b7271057b4204
work_keys_str_mv	AT mohammedabdatiyaalsaraj simulationofoxygenmasstransferinaninternalloopairliftreactorwithaxialdispersionmodel AT ameelmohammedrahman simulationofoxygenmasstransferinaninternalloopairliftreactorwithaxialdispersionmodel AT aseelabdaljabbar simulationofoxygenmasstransferinaninternalloopairliftreactorwithaxialdispersionmodel
_version_	1718401358736916480

Simulation of Oxygen Mass Transfer in an Internal Loop Airlift Reactor with Axial Dispersion Model

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