This work was undertaken with a view to obtaining a general correlation for liquid phase mass transfer in wetted-wall columns. Studies were made on the absorption of pure solute gases by various solvents in columns of varied dimensions. The column dimensions, the systems employed and the ranges of the variables covered are given in Table 1.
It was observed that the gas rate had no effect on the values of HL when the ReG was below 7, 000 or so, as shown in Fig. 3, and the difference obscrved by Emmert and Pigford4) between the HL valucs for absorption and those for desorption could not be noticed.
The plots of HL vs. Re on logarithmic coordinates showed two distinctly different regions, A and B, as seen in Figs. 4-10. In region A, the values of HL varied with Re^1.0 Sc^0.5 and (μ/ρ)^2/3 but were independent of z and σ. In region B, the HL values were proportional to Re^0.5 Sc^0.38, (μ/ρ)^0.59, z^0.12and σ^0.15
The data we e correlated with Eqs. 12 and 14, for region A and region B. The agreements of the data with the equations were good, as seen in Figs. 13, 14 and 15.