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Particle liquid mass transfer in stirred tanks
Author(s) -
Sykes P.,
Gomezplata A.
Publication year - 1967
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450450402
Subject(s) - impeller , dimensionless quantity , mass transfer , propeller , rushton turbine , agitator , mechanics , paddle , mass transfer coefficient , particle (ecology) , materials science , schmidt number , turbine , correlation coefficient , analytical chemistry (journal) , thermodynamics , physics , chemistry , composite material , mathematics , chromatography , engineering , turbulence , reynolds number , marine engineering , oceanography , geology , statistics
Mass transfer coefficients were determined for 1/8 inch diameter spherical particles suspended in stirred aqueous iodine solutions. Particle density was adjusted to within 5% of the liquid density. For these particles, suspended in a covered and fully baffled vessel, the effect of impeller speed (200‐600 rpm), system Schmidt number (770‐11, 300) and impeller type (fan disk turbine, propeller and 45° paddle and turbine) on the mass transfer coefficient, was examined. A dimensionless group correlation using the impeller blade tip velocity represent the data with an average deviation of 8% and a maximum deviation of 27%. N sh = 2 + 0.109\documentclass{article}\pagestyle{empty}\begin{document}$$ N_{sh} = 2 + 0.109\left({N_{Rc} *} \right)^{0.38} \left({N_{Sc} } \right)^{0.50} $$\end{document}Because the particles used in the present study are considerably different from the tablets, beads and crystals that have been used previously, the coefficients of this study are a strict test of existing correlations. Partial agreement of coefficients and recent correlations was observed, but no single correlation can be recommended. Considerable discussion of the many aspects of Harriott's method of correlation also is presented.