In our previous papers, equations for the liquid-side and the gas-side mass transfer coefficients in towers packed with Raschig rings and Berl saddles had been obtained. In this paper, experiments with ceramic spheres were made in order to clarify the influence of the shape of packings.
By measuring the wetted surface area (
aw) in towers packed with 1/2″-, 1″-spheres, the relation was expressed by Eq.(2).
The liquid-side and the gas-side capacity coefficients (
kLa,
kGa) in towers packed with 1/2″-, 1″-, 4/3″-spheres, respectively, were measured by means of the absorption of pure carbon dioxide and/or ammonia by water, and their correlated equations with liquid and gas flow rates were obtained as shown in Table 2 and Table 3.
Assuming that the effective surface area (
a) is equal to the wetted surface area (
aw) as described in the authors' previous reports,
kL and
kG were obtained by dividing
kLa and
kGa by aw respectively.
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