Izvorni znanstveni članak
Theoretical Prediction of Mass Transfer Coefficients in a Slurry Bubble Column Operated in the Homogeneous Regime
S. Nedeltchev
A. Schumpe
Sažetak
The classical penetration theory was corrected and then applied for the semi-theo-retical prediction of mass transfer coefficients k L a in a slurry bubble column operated in the homogeneous regime. The gas-liquid contact time was expressed as a ratio of bubble surface to the rate of surface formation. These terms were defined for the case of oblate ellipsoidal bubbles formed under homogeneous flow conditions. Six different liquid/solid systems (water/activated carbon, water/aluminium oxide tetralin/aluminium oxide, 0.8 M sodium sulfate solution/kieselguhr (diatomaceous earth),ligroin (petroleum ether)/polyethylene and ligroin/polyvinylchloride)were considered. By means of the same correction factor (a single function of Eötvös number)as derived previously for gas-liquid bubble columns, 85 experimental kL a values were fitted with a mean error of 19 %.
Ključne riječi
Slurry bubble column; mass transfer; ellipsoidal bubbles; contact time; penetration theory; correction factor
Hrčak ID:
18322
URI
Datum izdavanja:
29.12.2007.
Posjeta: 1.182 *