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Volumetric mass transfer coefficient in stirred reactors

✍ Scribed by Dr. Václav Linek; Dr. Václav Vacek

Publisher
John Wiley and Sons
Year
1988
Tongue
English
Weight
267 KB
Volume
11
Category
Article
ISSN
0930-7516

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✦ Synopsis

It is shown that the volumetric mass transfer coefficients, presented recently by Schmitz et al.

[ 11 for viscous solutions of carboxymethyl cellulose (CMC) in aqueous sodium sulphite, are considerably underestimated as a result of unjustified neglect of the oxygen back pressure during oxygen absorption. Schmitz et al. [ 11 found a decrease in the exponent n in the relationship between the oxygen mass transfer coefficient, k p , and the power dissipated per unit volume of the liquid phase, e ( k p m e " ) , and ascribed it to viscosity effects. However, no such decrease is observed, provided that the actual oxygen back pressure is taken into account.

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