A hydrodynamic study on the columns having MELLAPAC 750Y-type structured packing

New bench scale measurements of gas-side pressure drop have been carried ou t using absorption columns equipped with two different packings: convention al Raschig rings, and a structured packing of Mellapak 750Y type. The press ure drop per unit hight, at the same loading, was about twenty folds smalle r in the structured packing. The data have been further correlated on the b asis of a new fluid-dynamics model, valid far any type of packing. It has b een found that the "packing constant" (K-p) was not dependent only on the t exture of the packing. It linearly increased with the liquid load.