Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9623754 | Chemical Engineering Journal | 2005 | 13 Pages |
Abstract
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 (ÉG) 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 sâ1, 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).
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Chemical Engineering (General)
Authors
Yogesh K. Doshi, Aniruddha B. Pandit,