PARTICLE-LIQUID MASS TRANSFER IN MULTI-IMPELLER AGITATED THREE PHASE REACTORS
- 25 April 1996
- journal article
- research article
- Published by Taylor & Francis in Chemical Engineering Communications
- Vol. 146 (1) , 65-84
- https://doi.org/10.1080/00986449608936482
Abstract
The mass transfer coefficient between solid particle and liquid has been measured in high aspect ratio multiimpeller agitated three phase (gas-liquid-solid) reactors. Experiments were conducted in 0.15 and 0.30 m id acrylic columns of lm length each. Two types of impeller were used: disk turbine (DT) and pitched turbine downflow (PTD). Air used as the gas phase was introduced through a ring sparger of 0.8 D size located 0.1 T distance above the bottom. The interimpeller spacing was maintained at the tank diameter. The range of gas velocity used was 0-15 mm/s. A unique correlation between particle-liquid mass transfer coefficient and critical impeller speed for solid suspension has been presented.Keywords
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