Effect of internals and sparger design on mixing behavior in sectionalized bubble column

Doshi, Yogesh K. ; Pandit, Aniruddha B. (2005) Effect of internals and sparger design on mixing behavior in sectionalized bubble column Chemical Engineering Journal, 112 (1-3). pp. 117-129. ISSN 1385-8947

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Official URL: http://linkinghub.elsevier.com/retrieve/pii/S13858...

Related URL: http://dx.doi.org/10.1016/j.cej.2005.07.004


An experimental study has been carried out to investigate the effect of internals and sparger design on mixing time (θmix) and fractional gas hold-up (εG) in a batch mode sectionalized bubble column. Air and water were used as the gas-liquid phases, respectively. In the present work, sparger with the percent free area (% FA) of 0.136 and 0.6% has been used and the superficial gas velocity (VG), liquid height to column diameter (Hc/D), percent free area of the sectionalizing plate was varied from 0.06 to 0.295 m s−1, 3 to 4 and 4 to 23%, respectively. It was found that there is no significant effect of the sparger design on the mixing time but it does strongly depend on VG, Hc/D and % FA of the sectionalizing plate. The one-dimensional dispersion model successfully predicts the tracer concentration profile and the longitudinal dispersion coefficient. Also, the effect of the presence of the electrolyte too has been studied by adding a known volume of the tracer solution (NaCl). Correlations have been developed for the estimation of the fractional gas hold-up, mixing time, longitudinal dispersion coefficient (DL) and the intercell exchange velocity (uB).

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
Keywords:Sectionalized Bubble Column; Sparger Plate; Mixing Time; Intercell Exchange Velocity; Longitudinal Dispersion Coefficient; Compartment Model
ID Code:39606
Deposited On:14 May 2011 09:14
Last Modified:14 May 2011 09:14

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