Mass transfer in mechanically agitated gas-liquid contactors

Mehta, V. D. ; Sharma, M. M. (1971) Mass transfer in mechanically agitated gas-liquid contactors Chemical Engineering Science, 26 (3). pp. 461-479. ISSN 0009-2509

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The theory of absorption with pseudo mth order irreversible reaction was used to obtain effective interfacial area, a, in mechanically agitated vessels. The liquid-side mass transfer coefficient, kLa was found by using the theory of absorption with slow chemical reaction. Eleven different systems were used to obtain a and four different systems were used to obtain kLa. The diameter of the contactor was varied from 12.5 cm to 70 cm. The effect of the following variables on a and KLa was investigated: speed, type and diameter of the agitator; tank diameter, height of the agitator and height of the clear liquid from the base of the contactor; ionic strength, nature of ions, viscosity and surface tension of the liquid. It appears that values of a and kLa cannot be predicted a priori, as system properties have a profound effect on a and kLa. However, experiments can be done in a small agitated contactor (say, 20 cm dia. contactor) and scale-up can be done on the basis of equal tip speed divided by the square root of the contactor diameter, possibly with a fair degree of confidence.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
ID Code:46105
Deposited On:30 Jun 2011 13:41
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