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/Title ({NUMERICAL STUDY OF THE HYDRODYNAMICS AND MASS TRANSFER IN THE EXTERNAL LOOP AIRLIFT REACTOR: Scientific paper})
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/Subject (The objective of this study was to investigate the hydrodynamics and the gas-liquid mass transfer coefficient of an external-loop airlift reactor \(ELAR\). The ELAR was operated in three cases: different inlet velocities of fluids, different alcohols solutions \(water, 0.5% methanol, 0.5% ethanol, 0.5% propanol and 0.5% butanol\) and different concentration of methanol in solutions \(0%, 0.5%, 1%, 2% and 5%\). The influence of superficial gas velocity and various diluted alcohol solutions on hydrodynamics and the gas-liquid mass transfer coefficient of the ELAR was studied. Experimentally, the gas hold-up, liquid velocities and volumetric mass transfer coefficient values in the riser and the downcomer were obtained from the literature source. A computational fluid dynamics \(CFD\) model was developed, based on two-phase flow, investigating different liquids regarding surface tension, assuming the ideal gas flow, applying the finite volume method and Eulerian-Eulerian model. The volumetric mass transfer coefficient was determined using the CFD and artificial neural network model. The effects of liquid parameters and gas velocity on the characteristics of the gas-liquid mass transfer were simulated. These models were compared with the appropriate experimental results. The CFD model successfully simulates the influence of different alcohols regarding the number of C-atoms on hydrodynamics and mass transfer.)
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2022-05-25T16:58:00+02:00
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Artificial neural network model
Eulerian
Eulerian model
Hydrodynamics
Mass Transfer
2022-05
{NUMERICAL STUDY OF THE HYDRODYNAMICS AND MASS TRANSFER IN THE EXTERNAL LOOP AIRLIFT REACTOR: Scientific paper}
bibtex/number/3
bibtex/journal/Chemical Industry \& Chemical Engineering Quarterly
bibtex/pages/225--235
bibtex/file/:C\:/Users/User/AppData/Local/Mendeley Ltd./Mendeley Desktop/Downloaded/Koji{'{c}} et al. - 2022 - NUMERICAL STUDY OF THE HYDRODYNAMICS AND MASS TRANSFER IN THE EXTERNAL LOOP AIRLIFT REACTOR Scientific paper.pdf:pdf;:CICEQ_Vol28_ No3_p225-235_Jul-Sep_2022.pdf:PDF
bibtex/url/https://www.ache-pub.org.rs/index.php/CICEQ/article/view/947
bibtex/volume/28
bibtex/month/may
bibtex/issn/1451-9372
bibtex/bibtexkey/Kojic2022
Predrag Koji{\'{c}}
Jovana Koji{\'{c}}
Milada Pezo
Jelena Krulj
Lato Pezo
Nikola Mirkov
The objective of this study was to investigate the hydrodynamics and the gas-liquid mass transfer coefficient of an external-loop airlift reactor (ELAR). The ELAR was operated in three cases: different inlet velocities of fluids, different alcohols solutions (water, 0.5% methanol, 0.5% ethanol, 0.5% propanol and 0.5% butanol) and different concentration of methanol in solutions (0%, 0.5%, 1%, 2% and 5%). The influence of superficial gas velocity and various diluted alcohol solutions on hydrodynamics and the gas-liquid mass transfer coefficient of the ELAR was studied. Experimentally, the gas hold-up, liquid velocities and volumetric mass transfer coefficient values in the riser and the downcomer were obtained from the literature source. A computational fluid dynamics (CFD) model was developed, based on two-phase flow, investigating different liquids regarding surface tension, assuming the ideal gas flow, applying the finite volume method and Eulerian-Eulerian model. The volumetric mass transfer coefficient was determined using the CFD and artificial neural network model. The effects of liquid parameters and gas velocity on the characteristics of the gas-liquid mass transfer were simulated. These models were compared with the appropriate experimental results. The CFD model successfully simulates the influence of different alcohols regarding the number of C-atoms on hydrodynamics and mass transfer.
Association of Chemical Engineers of Serbia
10.2298/CICEQ210522034K
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