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Volumetric mass transfer coefficient in stirred reactors
Author(s) -
Linek Václav,
Vacek Václav
Publication year - 1988
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.270110133
Subject(s) - mass transfer coefficient , thermodynamics , chemistry , mass transfer , viscosity , oxygen , volume (thermodynamics) , carboxymethyl cellulose , aqueous solution , analytical chemistry (journal) , sodium , chromatography , physics , organic chemistry
It is shown that the volumetric mass transfer coefficients, presented recently by Schmitz et al. [1] 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. [1] found a decrease in the exponent n in the relationship between the oxygen mass transfer coefficient, k l a , and the power dissipated per unit volume of the liquid phase, e ( k l a ∝ e n ), and ascribed it to viscosity effects. However, no such decrease is observed, provided that the actual oxygen back pressure is taken into account.