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INTERNATIONAL JOURNAL OF ENGINEERING, SCIENCE AND - Volume 6, Issue 8,, December 2017 (Special Issue)

Pages: 1147-1158

Date of Publication: 25-Dec-2017

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Wall-to-bulk mass transfer in bubble columns with string of cones

Author: M. Vijay1 K.V. Ramesh2

Category: Engineering, Science and Mathematics


In the present study electrochemical reactions are carried out in bubble columns for achieving enhanced mass transfer rates. The mass transfer coefficient was computed from measured limiting currents at the electrodes fixed flush with the inner surface of the perspex tube wall which acted as test section. A string of cones arranged concentrically on a rod was used as the turbulent promoter. Improvements in the mass transfer coefficient due to cone elements are 100% when compared with the bubble column without any promoter. In the present study the effect of pertinent dynamic variables such as superficial gas velocity and liquid velocity; and geometric variables such as cone diameter, pitch, half apex angle of cone and rod diameter on mass transfer coefficient have been analyzed graphically. Correlation equations that gave best fit were obtained from least squares regression analysis, which can be used for the prediction of mass transfer coefficient.

Keywords: Mass transfer coefficient; Bubble column; Augmentation; Turbulent promoter.