10.8. ESTIMATION OF MASS-TRANSFER COEFFICIENTS FOR PACKED TOWERS
10.8A. Experimental Determination of Film Coefficients
The individual film mass-transfer coefficients 
and 
depend generally upon Schmidt number, gas and liquid mass velocities, and the size and shape of the packing. The interactions among these factors are quite complex. Hence, the correlations for mass-transfer coefficients are highly empirical. The reliability of these correlations is not too satisfactory. Deviations of up to 25% are not uncommon. A major difficulty arises because ...
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