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Correlation for k L a Prediction of Airlift Loop Reactors Including the Gas Phase Residence Time Effect
Author(s) -
Mießner Ulrich,
Kück Ulf D.,
Dujardin Viviane,
Heithoff Susanne,
Räbiger Norbert
Publication year - 2015
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.201500154
Subject(s) - airlift , mass transfer , loop (graph theory) , mass transfer coefficient , residence time (fluid dynamics) , mechanics , chemistry , transient (computer programming) , gas phase , phase (matter) , residence time distribution , thermodynamics , flow (mathematics) , physics , mathematics , engineering , bioreactor , geotechnical engineering , organic chemistry , combinatorics , computer science , operating system
Experimental mass transfer data and literature data of airlift loop reactors are analyzed concerning the effect of the gas phase residence time on the volumetric mass transfer coefficient k L a . It becomes evident that a neglect of the oxygen depletion can be regarded as a diminishment of the mass transfer driving force. The latter is found to be an important cause of the mass transfer dependency on the actual apparatus height of airlift loop reactors. Therefore, a new correlation is presented that describes the volumetric mass transfer coefficients of airlift loop reactors by including the effect of gas phase transient component concentration depletion.