Role of sparger design in mechanically agitated gas-liquid reactors. Part II: Liquid phase mixing

Rewatkar, Vilas B. ; Joshi, Jyeshtharaj B. (1991) Role of sparger design in mechanically agitated gas-liquid reactors. Part II: Liquid phase mixing Chemical Engineering & Technology, 14 (6). pp. 386-393. ISSN 0930-7516

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Official URL: http://onlinelibrary.wiley.com/doi/10.1002/ceat.27...

Related URL: http://dx.doi.org/10.1002/ceat.270140605

Abstract

Liquid phase mixing time was measured in 0.57, 1.0 and 1.5 m i.d. mechanically agitated gas-liquid reactors. Transient conductivity technique was used for the mixing time measurement. Pitched blade downflow turbine was employed. The design details of PTD impellers such as diameter (0.22 T to 0.5 T) and blade width (0.25 D to 0.35 D) were studied. The influence of sparger types and their design on mixing time has been investigated. For this purpose, pipe, ring, conical, and concentric ring spargers were employed. The design details of the ring sparger, i.e. ring diameter, number of holes and hole size were also studied in depth. Sparger location with respect to the impeller was found to be the most important variable and, therefore, it was varied for practically all the spargers studied in this work. It was found that the liquid phase mixing time depends on the impeller design, sparger design, sparger location, impeller speed and superficial gas velocity. Correlations have been developed for the dimensionless mixing time.

Item Type:Article
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ID Code:61073
Deposited On:13 Sep 2011 10:54
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